2021/06/24 更新

写真a

リ リユウウン
李 留云
LI LIUYUN
所属
教育研究院 自然科学系 生産デザイン工学系列 助教
自然科学研究科 材料生産システム専攻 助教
工学部 工学科 助教
職名
助教
外部リンク

学位

  • 博士(工学) ( 2007年3月   群馬大学 )

研究キーワード

  • エネルギー回収

  • 接触改質分解

  • 燃料ガス製造

  • 畜産廃棄物

  • 低温ガス化

  • 石炭

  • バイオマス

研究分野

  • ものづくり技術(機械・電気電子・化学工学) / 反応工学、プロセスシステム工学

  • ものづくり技術(機械・電気電子・化学工学) / 触媒プロセス、資源化学プロセス

  • ものづくり技術(機械・電気電子・化学工学) / 移動現象、単位操作

経歴(researchmap)

  • 群馬県産業支援機構 地域結集型研究開発プログラム 研究員

    2006年4月 - 現在

      詳細を見る

経歴

  • 新潟大学   工学部 工学科   助教

    2017年4月 - 現在

  • 新潟大学   自然科学研究科 材料生産システム専攻   助教

    2010年4月 - 現在

  • 新潟大学   自然科学研究科 材料生産システム専攻   助教

    2010年4月 - 現在

  • 新潟大学   物質生物工学   助教

    2010年4月 - 2017年3月

 

論文

  • Fast pyrolysis and combustion characteristic of three different brown coals 査読

    Jun Han, Li Zhang, Hee Joon Kim, Yuichi Kasadani, Liuyun Li, Tadaaki Shimizu

    Fuel Processing Technology176   15 - 20   2018年7月

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Elsevier B.V.  

    In this study, brown coals fast pyrolysis/combustion was carried out in a moving furnace coupled with a balance, and the mass change of sample and emission of hydrocarbon components were online recorded. On the basis of the experimental results, the pyrolysis/combustion kinetic parameters were calculated. In the fast pyrolysis process, the apparent activation energy of Loy Yang brown coal, Wara brown coal and Usibelli brown coal was 36.9, 33.1 and 28.1 kJ/mol respectively, which was far lower than that obtained under the slow pyrolysis process. The main light hydrocarbon gases evolved from brow coal fast pyrolysis were CH4, C2H6 and C3H8. At the same time, it was found that the reaction rate of brown coal fast pyrolysis was strongly influenced by the oxygen content of the raw coal. The high oxygen content of the raw coal was beneficial to pyrolytic reaction. The combustion process of the brown coal could be divided two stages: in the first stage, the evolution and combustion of volatile matter occurred simultaneously. In the secondary stage, only char combustion occurred. The apparent activation energy of char combustion was 2.3–20.8 kJ/mol.

    DOI: 10.1016/j.fuproc.2018.03.010

    Web of Science

    Scopus

    researchmap

  • Performance of active nickel loaded lignite char catalyst on conversion of coffee residue into rich-synthesis gas by gasification 査読

    Suparin Chaiklangmuang, Liuyun Li, Naokatsu Kannari, Takayuki Takarada

    Journal of the Energy Institute91 ( 2 ) 222 - 232   2018年4月

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Elsevier B.V.  

    Performance of nickel-loaded lignite char catalyst on conversion of coffee residue into synthesis gas by catalytic steam gasification was carried out at low reaction temperatures ranging from 500 °C to 650 °C in the two-stage quartz fixed bed reactor. The effects of steam pressures (30, 36 and 50 kPa corresponding to S/B = 2.23, 2.92 5.16, respectively) and catalyst to biomass ratios (C/B ratio = 0, 1, 3) were considered. Nickel-loaded lignite char was prepared as a catalyst with a low nickel loading amount of 12.9 wt%. The gas yields in the catalytic steam gasification process strongly depended on the reaction temperature and C/B ratio. The total gas yields obtained in catalytic steam gasification was higher than that of catalytic pyrolysis, steam gasification and non-catalytic pyrolysis with steam absence by factors of 3.0, 3.8 and 7.7, respectively. To produce the high synthesis gas, it could be taken at 600 °C with total gas yields of 67.13 and 127.18 mmol/g biomass-d.a.f. for C/B ratios of 1.0 and 3.0, respectively. However, the maximum H2/CO ratio was 3.57 at a reaction temperature of 600 °C, S/B of 2.23 and C/B of 1.0. Considering the conversion of coffee residue by catalytic steam gasification using the nickel-loaded lignite char catalyst, it is possible to covert the coffee residue volatiles into rich synthesis gas.

    DOI: 10.1016/j.joei.2016.12.002

    Web of Science

    Scopus

    researchmap

  • N2O reduction and NOx adsorption in carbonator of calcium looping CO2 capture process 査読

    Tadaaki Shimizu, Takuya Shimoda, Ryou Houshito, Heizo Kato, Osamu Hara, Liuyun Li

    Nihon Enerugi Gakkaishi/Journal of the Japan Institute of Energy96 ( 7 ) 228 - 238   2017年7月

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Japan Institute of Energy  

    A dual-fluidized bed solid circulating system that comprised a bubbling bed carbonator and a fast fluidized bed regenerator was operated under a condition of Calcium Looping (CaL) CO2 capture process. Calcined limestone (CaO) was employed as bed material. Gas mixture simulating flue gas from air-blown combustor consisted of CO2, N2O, NO, O2, and N2 was fed to the carbonator. Most part of the fed CO2 was captured by the calcined limestone particles, then the partially carbonated particles were transported to the regenerator, in which thermal decomposition of CaCO3 was carried out in air stream. The carbonator of CaL process was found to be effective for N2O reduction when the sorbent particles had activity to capture CO2. A part of NO in the feed gas was also adsorbed by CaO particles, then the adsorbed NO was transported to the regenerator, and released to the gas phase there, though the net decomposition of NOx was not observed. CaL process was revealed to be a multifunctional process of CO2 capture, N2O decomposition, and removal of a part of NO in the flue gas fed to the carbonator.

    DOI: 10.3775/jie.96.228

    Web of Science

    Scopus

    researchmap

  • Formation of CO and CO2 in Carbonator and NOx in Regenerator under Calcium Looping Process Conditions 査読

    Tadaaki Shimizu, Ayato Yoshizawa, Heejoon Kim, Liuyun Li

    JOURNAL OF CHEMICAL ENGINEERING OF JAPAN49 ( 3 ) 280 - 286   2016年3月

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:SOC CHEMICAL ENG JAPAN  

    A dual-fluidized bed experimental apparatus was operated to study coal combustion behavior under the Calcium Looping (CaL) process temperature conditions. This apparatus consisted of a fast fluidized bed regenerator and a bubbling fluidized bed carbonator. High-volatile bituminous coal and semi-anthracite were burned in oxygen-enriched air in the regenerator. The formation of CO and CO2 in the carbonator caused by oxidation of char, which was transported from the regenerator with circulating bed material, was measured. Inert silica sand was employed as the bed material so that the produced CO2 could be measured without being captured by the bed material. The effect of the O-2 concentration in the fluidizing gas of the carbonator on the formation of CO and CO2 was evaluated. The formation rate of CO and CO2 in the carbonator was governed by different controlling factors depending on coal rank. NOx formation in the regenerator was also measured. The oxygen concentration in the carbonator fluidizing gas had only a minor influence on NOx emissions from the regenerator irrespective of char consumption in the carbonator.

    DOI: 10.1252/jcej.14we261

    Web of Science

    researchmap

  • Biomass Volatile Decomposition with a Novel Ni Loaded Brown Coal Char at Extremely Low Temperature 査読

    Keiichi Kaneko, Liuyun Li, Aya Matsushima, Hoshito Sato, Tadaaki Shimizu, Heejoon Kim, Takayuki Takarada

    JOURNAL OF CHEMICAL ENGINEERING OF JAPAN49 ( 3 ) 294 - 299   2016年3月

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:SOC CHEMICAL ENG JAPAN  

    Decomposition of Japanese cypress volatiles has been found to proceed efficiently under a prepared Ni loaded brown coal (LY-Ni) char at extremely low temperatures around 400-450 degrees C. This temperature range is much lower than conventional gasification methods (600-800 degrees C for catalytic and 800-950 degrees C for non-catalytic). For the low temperature decomposition of biomass volatiles, the LY-Ni coal with about 20 wt% Ni loading content by ion-exchange and impregnation methods showed a higher activity when compared with the lower LY-Ni coal by ion-exchange only and the higher Ni content of 27 wt%. Nickel particles in the 20 wt% LY-Ni coal dispersed well in the brown coal, with a mean particle size of 5 nm after devolatilization treatment at temperatures of 400-500 degrees C. In the presence of 20 wt% LY-Ni char, tarry materials converted fairly significantly into gases so that the carbon amount in tarry materials was less than 2% (based on carbon). Compared with the cases of sand, the LY-Ni char increased the total gases, mainly including H-2, CO, CO2 and CH4, by 3.5-4.5 times, and hydrogen practically by 5.4-6.9 times at decomposition temperatures of 450 to 600 degrees C. Steam addition advanced the tarry materials gasification and carbon conversion into gas products greatly.

    DOI: 10.1252/jcej.14we278

    Web of Science

    researchmap

  • Thermal degradation behavior of coffee residue in comparison with biomasses and its product yields from gasification 査読

    Suparin Chaiklangmuang, Keisuke Kurosawa, Liuyun Li, Kayoko Morishita, Takayuki Takarada

    JOURNAL OF THE ENERGY INSTITUTE88 ( 3 ) 323 - 331   2015年8月

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ELSEVIER SCI LTD  

    The thermal degradation behavior of coffee residue in comparison with that of several biomass samples and coffee residue steam catalytic gasification were investigated. Devolatilization was carried out using the thermogravimetric method, at temperatures ranging from 30 degrees C to 1000 degrees C. By and large, coffee residue decomposition was easier than that of other biomasses, but it was less than that of chicken feces; also, the devolatilization behaviors of the biomasses depended predominantly on the type of biomass. Steam catalytic gasification was carried out in the two-stage quartz-fixed bed that used Ni-loaded brown coal catalyst to produce fuel gases at low reaction temperatures, ranging from 500 degrees C to 650 degrees C, and at a steam pressure of 30 kPa. Particularly noteworthy was the fact that the total gas yield increased significantly with increase in temperature. According to Total Organic Carbon results, at temperatures above 550 degrees C, the light tar materials were almost constant. As evident from the results of the LY-Ni coal pyrolysis, at a catalytic bed temperature of 600 degrees C, there is a slight interfere of the LY-Ni catalyst in the biomass gasification yield, and it would be possible to take the advantage of brown coal to produce the gas products, H-2, CO, CO2 and CH4, from the coffee residue steam catalytic gasification. (C) 2014 Energy Institute. Published by Elsevier Ltd. All rights reserved.

    DOI: 10.1016/j.joei.2014.08.001

    Web of Science

    researchmap

  • A novel method for nickel recovery and phosphorus removal from spent electroless nickel-plating solution 査読

    Liuyun Li, Naoki Takahashi, Keiichi Kaneko, Tadaaki Shimizu, Takayuki Takarada

    SEPARATION AND PURIFICATION TECHNOLOGY147   237 - 244   2015年6月

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ELSEVIER SCIENCE BV  

    A new approach to nickel recovery from spent electroless nickel-plating (ENP) solution was investigated using ion-exchange method with brown coal. Nickel ion-exchange was influenced by the solution pH, with the optimum values of pH 9.0-10.0, and was hindered by the anion species existing in the spent solution, especially for the high concentrations of phosphorus compounds. Calcium hydroxide precipitated most of the phosphorus from spent ENP solution, with the highest phosphorus removal efficiency of 98.2%. At the same time, pH control is required to prevent the co-precipitation of nickel hydroxide. Phosphorus removal with CaCO3 and CaCl2 showed strong pH dependence. The solution pH dropped with CaCl2 addition. As a result, the formation of calcium sulphate occurred prior to that of P-Ca compounds. In contrast, CO32- anions from CaCO3 dissolution reacted with the H+ ions to neutralize the solution and decrease CaCO3 solubility at last, the phosphorus removal reached its maximum of 51%. Combined use of calcium carbonate and calcium chloride improved phosphorus removal, maximizing the phosphorus removal efficiency at 94.8%, and enabling 62% of nickel in the ENP solution to be ion-exchanged into brown coal. (C) 2015 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.seppur.2015.04.029

    Web of Science

    researchmap

  • Fuel Gas Production and Plant Nutrient Recovery from Digested Poultry Manure 査読

    Keiichi Kaneko, Liuyun Li, Tadaaki Shimizu, Hideyuki Matsumura, Takayuki Takarada

    JOURNAL OF POULTRY SCIENCE51 ( 4 ) 444 - 450   2014年10月

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:JAPAN POULTRY SCIENCE ASSOC  

    A pyrolysis/ashing process for poultry manure with the aim of recovering both the potential energy and the plant nutrients is proposed. Volatile compounds derived from the pyrolysis process were subsequently decomposed using a catalyst to produce light fuel gases, while the solid residues (char or ash) were applied to plant cultivation to examine their usefulness as fertilizers. During the poultry manure pyrolysis, the evolution of volatiles was found to occur at temperatures below 500 degrees C and the volatiles thus derived were effectively converted into light fuel gases by employing a commercial Ni/Al2O3 catalyst. Steam addition promoted the water-gas-shift reaction and resulted in high yields of hydrogen. The plant nutrients nitrogen, phosphorus, and potassium were concentrated in the poultry manure char. Komatsuna cultivation tests demonstrated that this char represented a source of highly available nutrients and produced higher crop yields than conventional fertilizers. The porous structure of the poultry manure char was considered to be an important factor in terms of its function as a fertilizer.

    DOI: 10.2141/jpsa.0130184

    Web of Science

    researchmap

  • Coal combustion under Calcium Looping Process conditions 査読

    Caiyun Gao, Takayuki Takahashi, Hiroko Narisawa, Ayato Yoshizawa, Tadaaki Shimizu, Heejoon Kim, Liuyun Li

    FUEL127   38 - 46   2014年7月

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ELSEVIER SCI LTD  

    Coal of three kinds was burned in an oxygen-enriched atmosphere using a twin-fluidized bed solid circulation system under conditions of the Calcium Looping Process. This twin-fluidized bed system comprised a fast bed regenerator (calciner), into which fuel and oxygen-enriched gas were fed, and a bubbling bed absorber (carbonator), into which air was fed. Inert quartz sand was used as the bed material to evaluate the coal combustion behavior, including char transportation from regenerator to absorber and formation of CO and CO2 there. First, the circulation rate and the residence time of solids in the regenerator (calciner) were measured to determine the suitable operation conditions. The effect of gas feed staging to the regenerator on the solid residence time was evaluated. By reducing the ratio of the primary gas feed rate to total gas feed rate to 0.5, average solid residence time of about 40 s was attained. Under this gas-feed condition, coal combustion experiments were conducted. Effects of volatile matter content of coal on CO and CO2 formation in the absorber and NOx emissions from the regenerator were investigated. High-volatile matter coal was found to be favorable to reduce CO and CO2 formation in the absorber, but conversion of the fuel-N to NOx of high-volatile matter coal was higher than that from low-volatile coal. (C) 2013 Elsevier Ltd. All rights reserved.

    DOI: 10.1016/j.fuel.2013.06.017

    Web of Science

    researchmap

  • Role of char in NOx formation during coal combustion at a regenerator temperature of calcium looping process 査読

    Caiyun Gao, Takanori Higuchi, Ayato Yoshizawa, Tadaaki Shimizu, Heejoon Kim, Liuyun Li

    FUEL121   319 - 326   2014年4月

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ELSEVIER SCI LTD  

    Coal of three kinds was burned in an oxygen-enriched atmosphere using two types of reactor both of which had the same fast fluidized bed for coal combustion. One was a dual-fluidized bed system (dual-FB), simulating Calcium Looping process comprised a fast fluidized bed regenerator and a bubbling bed carbonator. The other was a conventional single circulating fluidized bed combustor (single-CFBC). In both systems, coal combustion in oxygen-enriched atmosphere was carried out under regenerator temperature condition of Calcium Looping process. Inert quartz sand was used as the bed material to evaluate carbon consumption in the carbonator of dual-FB. Formation of NOx in the fast fluidized beds was measured for both reactors. For dual-FB, formation of CO and CO2 in the carbonator was also measured. High-volatile matter coal was found to be favorable to reduce CO and CO2 formation in the carbonator, but conversion of the fuel-N to NOx of high-volatile matter coal was higher than that from low-volatile coal. The emissions of NOx from single-CFBC were less than those from the regenerator of dual-FB under the same combustion condition. From the emissions of CO and CO2 from the carbonator, the decrease in char combustion in the regenerator of dual-FB was calculated. An empirical relationship between the conversion of fuel-N to NOx in the fast fluidized bed and the ratio of fixed carbon to volatile matter of the fuel was obtained. (C) 2014 Elsevier Ltd. All rights reserved.

    DOI: 10.1016/j.fuel.2013.12.060

    Web of Science

    researchmap

  • Conversion of nitrogen compounds and tars obtained from pre-composted pig manure pyrolysis, over nickel loaded brown coal char 査読

    Liuyun Li, Takayuki Takarada

    Biomass and Bioenergy56   456 - 463   2013年9月

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    Fuel gas production and nitrogen transformation during pig manure pyrolysis from room temperature to 900°C are investigated. The catalytic decomposition of the derived volatiles is also studied. Ammonia, HCN and N2 were obtained as the main N-containing gases. Ammonia was mainly emitted below 700°C, which corresponds to 24.8wt% of the nitrogen in the manure. Hydrogen cyanide and N2 gases obviously formed at temperatures above 700°C, while the HCN concentration was as low as one ninth that of NH3 and one fifth of the concentration of nitrogen even at 900°C. Thermal cracking of the pyrolysis volatiles produced little NH3, but noticeably increased HCN formation.When the prepared nickel-loaded brown coal char (LY-Ni) was added to the second part of the reactor (second stage) as a catalyst, most of the N-containing species in the volatiles converted into N2 gas. It suggests that LY-Ni has high catalytic activity for the conversion of N-containing compounds. Significant quantities of light fuel gases (H2, CO and CH4) were also generated. Compared with sand, 5.8 times (H2 and CO) the amount of gases was produced with the LY-Ni char at 650°C. Decomposition of the manure volatiles depends on the catalyst temperature. Total product gases approximately doubled in yield when the catalyst temperature increased from 450 to 550°C, and the volatiles conversion (based on carbon balance of the manure volatiles) increased from 72.4wt% to 92.0wt%. At 600-700°C, the volatiles conversions stabilized at high levels of 96.7-98.2wt%. © 2013 Elsevier Ltd.

    DOI: 10.1016/j.biombioe.2013.05.028

    Web of Science

    Scopus

    researchmap

  • Synthesis gas production from catalytic gasification of waste biomass using nickel-loaded brown coal char 査読

    Xianbin Xiao, Jingpei Cao, Xianliang Meng, Duc Dung Le, Liuyun Li, Yukiko Ogawa, Kazuyoshi Sato, Takayuki Takarada

    FUEL103   135 - 140   2013年1月

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ELSEVIER SCI LTD  

    This paper presents an experimental research concerning the catalytic gasification of waste biomass to synthesis gas using Ni-loaded brown coal char (Ni/BCC). The attention is focused on the catalytic conditions for enhancing the synthesis gas production, improving its composition and extending the catalyst lifetime. The aim is achieved by means of the characterization of Ni/BCC and the product gas analysis, through gasification experiments of a woody biomass and an animal-waste-derived biomass both in a fixed bed reactor and a fluidized bed reactor at various catalytic temperatures and steam/biomass-carbon (S/C) ratios. Effects of the pyrolysis temperature and the steam treatment on the nickel crystallite size are analyzed and used as the reference of choosing optimum gasification conditions. With brown coal char as support material, Ni/BCC is found as an excellent catalyst even at low temperature of about 650 degrees C and shows a good resistance ability of coke formation, compared to non-catalyst and Ni/Al2O3. More than 25 h continuous operation is also performed in a 1 kg/h Internally Circulating Fluidized-bed Gasifier (ICFG) to assess the lifetime of Ni/BCC. Smaller S/C ratio at the appropriate temperature is suggested to lower the coal char gasification, thereby reducing the degradation of the support material. (C) 2011 Elsevier Ltd. All rights reserved.

    DOI: 10.1016/j.fuel.2011.06.077

    Web of Science

    researchmap

  • Steam Gasification for Biomass Tar with Natural Ores of Limonite and Dolomite 査読

    Liuyun Li, Hiroo Kunii, Masamitsu Yamauchi, Hee-Joon Kim, Tadaaki Shimizu

    PROGRESS IN RENEWABLE AND SUSTAINABLE ENERGY, PTS 1 AND 2608-609   201 - 205   2013年

     詳細を見る

    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:TRANS TECH PUBLICATIONS LTD  

    Light gases were produced from biomass tar gasification using limonite and dolomite as catalysts. Experiments were performed in a fixed bed reactor with the gasification temperatures of 600-800 degrees C. Limonite gave the obvious effect on the tar gasification, and the light gases of hydrogen and carbon oxides were mainly obtained. Also, the gas yields depended on the catalytic temperature. Hydrogen yields tend to increasing with temperatures from 650 to 800 degrees C. The reaction equilibrium was changed by dolomite addition in the reactor system; hydrogen gas was doubled with the limonite and dolomite mixture compared to limonite only.

    DOI: 10.4028/www.scientific.net/AMR.608-609.201

    Web of Science

    researchmap

  • CO2 gasification of coal cokes using internally circulating fluidized bed reactor by concentrated Xe-light irradiation for solar gasification 査読

    Nobuyuki Gokon, Ryuta Ono, Tsuyoshi Hatamachi, Li Liuyun, Hee-Joon Kim, Tatsuya Kodama

    INTERNATIONAL JOURNAL OF HYDROGEN ENERGY37 ( 17 ) 12128 - 12137   2012年9月

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:PERGAMON-ELSEVIER SCIENCE LTD  

    For the solar thermochemical gasification of coal coke to produce CO + H-2 synthetic gas using concentrated solar radiation, a windowed reactor prototype is tested and demonstrated at laboratory scale for CO2 gasification of coal coke using concentrated Xe light from a 3-kW(th) sun simulator. The reactor was designed to be combined with a solar reflective tower or beam-down optics. The results for gasification performance (CO production rate, carbon conversion, and light-to-chemical efficiency) are shown for various CO2 flow rates and ratios. A kinetics analysis based on homogeneous and shrinking core models and the temperature distributions of the prototype particle bed are compared with those for a conventional fluidized bed reactor tested under the same Xe light irradiation and CO2 flow-rate conditions. The effectiveness and potential impacts of internally circulating fluidized bed reactors for enhancing gasification performance levels and inducing consistently higher bed temperatures are discussed in this paper. Copyright (C) 2012, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.

    DOI: 10.1016/j.ijhydene.2012.05.133

    Web of Science

    researchmap

  • Catalytic steam gasification of biomass in fluidized bed at low temperature: Conversion from livestock manure compost to hydrogen-rich syngas 査読

    Xianbin Xiao, Duc Dung Le, Liuyun Li, Xianliang Meng, Jingpei Cao, Kayoko Morishita, Takayuki Takarada

    BIOMASS & BIOENERGY34 ( 10 ) 1505 - 1512   2010年10月

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:PERGAMON-ELSEVIER SCIENCE LTD  

    Utilizing large amounts of animal waste as a source of renewable energy has the potential to reduce its disposal problems and associated pollution issues. Gasification characteristics of the manure compost make it possible for low temperature gasification. In this paper, an energy efficient approach to hydrogen-rich syngas from manure compost is represented at relatively low temperature, around 600 degrees C, in a continuous-feeding fluidized bed reactor. The effects of catalyst performance, reactor temperature, steam, and reaction type on gas yield, gas composition, and carbon conversion efficiency are discussed. The Ni-Al(2)O(3) catalyst simultaneously promotes tar cracking and steam reforming. Higher temperature contributes to higher gas yield and carbon conversion. The steam introduction increases hydrogen yield, by steam reforming and water gas shift reaction. Two-stage gasification is also tried, showing the advantage of better catalyst utilization and enhancing the catalytic reactions to some extent. (C) 2010 Elsevier Ltd. All rights reserved.

    DOI: 10.1016/j.biombioe.2010.05.001

    Web of Science

    researchmap

  • Multi-stage biomass gasification in Internally Circulating Fluidized-bed Gasifier (ICFG): Test operation of animal-waste-derived biomass and parametric investigation at low temperature 査読

    Xianbin Xiao, Duc Dung Le, Kayoko Morishita, Shouyu Zhang, Liuyun Li, Takayuki Takarada

    FUEL PROCESSING TECHNOLOGY91 ( 8 ) 895 - 902   2010年8月

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ELSEVIER SCIENCE BV  

    In this study, the design, construction and operation of an Internally Circulating Fluidized-bed Gasifier (ICFG) are introduced in detail. ICFG design provides a multi-stage gasification process, with bed material acting as the medium for char combustion and heat exchange by its internal circulation. And it is used for the steam gasification of animal waste at low temperature in view of producing fuel gas. The effects of pressure balance, pyrolysis temperature, catalytic temperature and steam/feedstock ratio on the gasifier performance (e.g. product gas yield, gas composition, tar content) are also discussed. Hydrogen-rich and low-tar product gas can be produced from the low-calorific feedstock, in the properly designed process together with high-performance catalyst. (C) 2009 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.fuproc.2009.08.009

    Web of Science

    researchmap

  • Low-temperature gasification of a woody biomass under a nickel-loaded brown coal char 査読

    Liuyun Li, Kayoko Morishita, Haruto Mogi, Kunihiko Yamasaki, Takayuki Takarada

    FUEL PROCESSING TECHNOLOGY91 ( 8 ) 889 - 894   2010年8月

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ELSEVIER SCIENCE BV  

    Catalytic gasification of a woody biomass, Japanese cypress, was investigated under a prepared nickel-loaded brown coal (LY-Ni) char in a two-stage fixed-bed reactor. The nickel-loaded brown coal was prepared by ion-exchange method with a nickel loading rate of 8.3 wt.%. Nickel species dispersed well in the brown coal, and the LY-Ni char via devolatilization at 600 degrees C showed a great porous property with a specific surface area of 382 m(2) g(-1).
    The LY-Ni char was confirmed to be quite active for the Japanese cypress volatiles gasification at a relatively low-temperature range from 450 to 650 degrees C. For example, at 550 degrees C, 16.6 times hydrogen gas and 6.3 times total gases were yielded from the catalytic steam gasification of Japanese cypress volatiles under the LY-Ni char, compared with the case of non-catalyst. The biomass tar decomposition showed a dependence on catalyst temperatures. When the catalyst temperature was higher than 500 degrees C, Japanese cypress tar converted much efficiently, high gas yields and high carbon balances were obtained. (C) 2009 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.fuproc.2009.08.003

    Web of Science

    researchmap

  • Development of a Ni-Loaded Brown Coal Char Catalyst for Fluidized Bed Biomass Gasification at Low Reaction Temperatures 査読

    Dung Duc Le, Xianbin Xiao, Kayoko Morishita, Liuyun Li, Takayuki Takarada

    JOURNAL OF CHEMICAL ENGINEERING OF JAPAN43 ( 5 ) 443 - 450   2010年

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:SOC CHEMICAL ENG JAPAN  

    The use of nickel-loaded brown coal char (Ni/BCC) as a catalyst for tar reforming has been studied under mild conditions in a laboratory-scale fluidized bed gasifier using steam as the gasifying agent and nitrogen as the product gas carriers. Characterization of the catalyst was performed in a fixed-bed reactor under various conditions such as Ni/BCC particle size in the range of 0.5 to 2 mm and pyrolysis temperature in the range of 823 to 1023 K in order to investigate the effect of both catalyst particle size and pyrolysis temperature on crystallite size of Ni/BCC. The Ni/BCC catalyst was consumed at various steam feed rate so as to determine the effect of steam feed rate on the size of the catalyst. The XRD pattern of the catalyst showed that the size of the Ni particles increases as the particle size of the catalyst decreases, pyrolysis temperature increases, and steam feed rate increases. SEM images and BET surface area were used to characterize the surface structure and surface area of the Ni/BCC catalyst, respectively. The space velocity and catalytic tar reforming temperature as a function of gas yields were investigated. The catalyst showed high and stable catalytic activity and produced a high-quality product gas with space velocities of 10000 and 4000 h(-1) at 923 and 873 K, respectively.

    DOI: 10.1252/jcej.09We195

    Web of Science

    researchmap

  • Catalytic Activity of Coal Char on Water-Gas Shift Reaction 査読

    Dahlia Diniyati, Kayoko Morishita, Liuyun Li, Takayuki Takarada

    JOURNAL OF CHEMICAL ENGINEERING OF JAPAN42 ( 3 ) 153 - 159   2009年

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:SOC CHEMICAL ENG JAPAN  

    Catalytic activity of coal chars on the water-gas shift (WGS) reaction has been investigated in a fixed bed reactor at various temperatures in the range of 700-900 degrees C. Two coal chars employed in this study (char A and char B) are signed with relatively high ash contents. The results show that WGS reaction occurred over both chars. Under the experimental conditions studied, the reaction rate towards hydrogen formation may be described as: r(H2) = 2.17 x 10(9) exp(124,800/RT)(p(CO) p(H2O) - p(CO2) p(H2)/K) for char A and r(H2) = 8.0 x 10(8) exp(127,900/RT)(p(CO) p(H2O) - p(CO2) pH(2)/K) for char B. The two chars showed different catalytic behaviors. Gas yield obtained from WGS reaction over char A was higher than that from char B. The higher catalytic activity of char A in WGS reaction was due to the combination of higher specific surface area, the presence of very fine and well-dispersed particles of mineral matters on the char surface, and also the high content of iron oxide fixed for each experiment. Demineralized char A still showed a catalytic activity due to the abundant amount of mesopores, whereas it was lower than char A, which indicates the importance of the mineral matters on the progress of WGS reaction.

    DOI: 10.1252/jcej.08we186

    Web of Science

    researchmap

▶ 全件表示

MISC

  • 6-1-3 カルシウムルーピングCO<sub>2</sub>分離プロセス内の窒素酸化物の反応経路

    清水 忠明, 原 理, 加藤 平蔵, 阿久津 淳, 小嵐 年, 和田 清楓, 金 煕濬, 李 留云

    日本エネルギー学会大会講演要旨集27 ( 0 ) 200 - 201   2018年

     詳細を見る

    記述言語:日本語   出版者・発行元:一般社団法人 日本エネルギー学会  

    &lt;p&gt;Reaction pathways of NOx and N2O in Calcium-Looping CO&lt;sub&gt;2&lt;/sub&gt; capture process were investigated by use of a two-stage fluidized bed system. Calcined limestone particles were employed as the bed material. Simulated flue gas containing CO&lt;sub&gt;2&lt;/sub&gt;, NO, and N&lt;sub&gt;2&lt;/sub&gt;O was fed to the carbonator,. During CO&lt;sub&gt;2&lt;/sub&gt; capture in the carbonator by CaO particles, a part of N&lt;sub&gt;2&lt;/sub&gt;O was decomposed in the carbonator. In addition, a part of NO fed to the carbonator was adsorbed by CaO particles, then the adsorbed NO was transported to the regenerator and released to the gas phase at high temperatures.&lt;/p&gt;

    CiNii Article

    researchmap

  • P-23 泥炭とキノコ廃菌床の熱分解特性

    児玉 拓生, 近藤 謙一, 水野 勇樹, 清水 忠明, 李 留云, 金 煕濬

    バイオマス科学会議発表論文集12 ( 0 ) 95 - 96   2017年

     詳細を見る

    記述言語:日本語   出版者・発行元:一般社団法人 日本エネルギー学会  

    &lt;p&gt;In this study, pyrolysis characterization of peat and mushroom culture waste were investigated. The composite of the pyrolysis gas (volatile material) and char for each reaction temperature were investigated by using fixed bed reactor. As a result, in the case of peat, generation rate of volatile material was increased with increasing temperature and the ratios of monoxide and dioxide are higher than other components. Also, the ratio of hydrogen was increased with increasing reaction temperature. Biomass shows the similar behavior such as peat, however total generation amount was slightly more than peat. In the case of peat-char, C ratio was increased and H ratio was decrease with increasing the temperature. These result showed that dehydrogenation and carbonization had a relationship and progressed with increasing pyrolysis temperature. In the case of biomass, similar result was shown.&lt;/p&gt;

    DOI: 10.20550/jiebiomassronbun.12.0_95

    CiNii Article

    researchmap

  • P-07 流動層によるえのき廃菌床と褐炭のガス化特性(熱分解・ガス化,ポスター発表)

    水野 勇樹, 大嶋 亮介, 近藤 謙一, 清水 忠明, 李 留云, 金 煕濬

    バイオマス科学会議発表論文集11 ( 0 ) 63 - 64   2016年

     詳細を見る

    記述言語:日本語   出版者・発行元:一般社団法人 日本エネルギー学会  

    For Studying Gasification characteristic of the mushroom culture waste and Brown coal, We investigated pyrolysis behavior of the mushroom culture waste and Brown coal. As a result, in all samples CO_2 ratio of gas generation decreased with increasing temperature. H_2 generation of Brown coal is little (less than 1%) from 400℃ to 500℃. And then, it increased rapidly from 600℃ to 800℃. However, H_2 generation of mushroom culture waste is increased from 400℃ to 800℃. About the mixture of the mushroom culture waste (5%) and Brown coal, H_2 generation is increased with temperature. The ratio is 41% at 800℃.

    DOI: 10.20550/jiebiomassronbun.11.0_63

    CiNii Article

    researchmap

  • P-06 泥炭とバイオマス混合灰の溶融特性(熱分解・ガス化,ポスター発表)

    小林 隼, 清水 忠明, 李 留云, 金 熙濬, YAO Hong

    バイオマス科学会議発表論文集11 ( 0 ) 61 - 62   2016年

     詳細を見る

    記述言語:日本語   出版者・発行元:一般社団法人 日本エネルギー学会  

    Price of high grade coal is rising with increasing the consumption of low grade coal. Furthermore, biomass use has become important because of depletion of fossil fuel and global warming issues. Biomass have problems such as low melting points of ash. In boiler, performance of heat transfer tube is decreased and surface of metal tube is corroded. In this study, we examined the melting characteristics of the peat ash and mushroom agriculture waste ash. As a results, weight of ash was decreased with increasing temperature. The melting points of peat ash is 1200℃ and biomass ash is 1300 ℃.

    DOI: 10.20550/jiebiomassronbun.11.0_61

    CiNii Article

    researchmap

  • P-01 擬集光太陽熱加熱式流動層を用いたバイオマス・褐炭の熱分解挙動(熱分解・ガス化,ポスター発表)

    近藤 謙一, 大島 亮介, 水野 勇樹, 清水 忠明, 李 留云, 金 熙濬

    バイオマス科学会議発表論文集11 ( 0 ) 51 - 52   2016年

     詳細を見る

    記述言語:日本語   出版者・発行元:一般社団法人 日本エネルギー学会  

    In this study, the pyrolysis of biomass and brown-coal have been studied in artificial sunlight heat fluidized bed. The property of the heated treated biomass and brown-coal were investigated. As a result, in the case of biomass, C ratio was increased with treating temperature increasing. The HHV has been taken the maximum value,5500kcal/kg, at 500℃.In the case of brown-coal, C ratio was increased with treating temperature increasing. The HHV has been taken about 7000 kcal/kg between 500℃ to 700℃. However, the C ratio and HHV are decreased between 700℃ to 800℃.

    DOI: 10.20550/jiebiomassronbun.11.0_51

    CiNii Article

    researchmap

  • O-23 発酵乾燥きのこ廃菌床の燃焼(燃焼・熱分解,口頭セッション)

    清水 忠明, 菅原 聴, 金 熙濬, 李 留云, 小浦方 格, 滝沢 和彦, 眞島 以都男

    バイオマス科学会議発表論文集11 ( 0 ) 45 - 46   2016年

     詳細を見る

    記述言語:日本語   出版者・発行元:一般社団法人 日本エネルギー学会  

    Enokitake (Flammulina velutipes) is one of the most popular cultivated mushrooms in Japan. A huge amount of waste culture is disposed thus its utilization as biomass fuel is needed. In addition, the ash can be used as fertilizer because the waste culture contains plant nutrients (P, K, Mg and Si). Due to high moisture content of waste mushroom culture, however, drying is necessary prior to use. As an approach for drying, compositing was conducted. The waste culture after drying was burned in a semi-pilot scale combustor with a combustor volume of 535 L. Reduction of NOx emissions by urea solution injection and SO_2 capture by Ca(OH)_2 powder injection were attempted. The ash was analyzed to determine contents of plant nutrients. Though the content of silica was high, the contents of water-soluble and citric-acid-soluble components were low. The treatment at high temperatures is considered to decrease the solubility of silica. Heavy metal contents were sufficiently lower than the acceptable level for the case of sludge fertilizer.

    DOI: 10.20550/jiebiomassronbun.11.0_45

    CiNii Article

    researchmap

  • 7-2-3 カルシウムルーピングプロセス吸収器条件でのCaO による亜酸化窒素分解

    清水 忠明, 静野 翔梧, 伊東 絢斗, 金 煕濬, 李 留云

    日本エネルギー学会大会講演要旨集25 ( 0 ) 180 - 181   2016年

     詳細を見る

    記述言語:日本語   出版者・発行元:一般社団法人 日本エネルギー学会  

    &lt;p&gt;Decomposition of nitrous oxide (N&lt;sub&gt;2&lt;/sub&gt;O) was conducted under a condition of carbonator of Calcium-Looping process for CO&lt;sub&gt;2&lt;/sub&gt; separation. Absorbent (CaO) catalyzed decomposition of N&lt;sub&gt;2&lt;/sub&gt;O at 873 K and its rate was as fast as the rate of CO&lt;sub&gt;2&lt;/sub&gt; capture. With the presence of CO&lt;sub&gt;2&lt;/sub&gt;, CaO gradually lost activities for CO&lt;sub&gt;2&lt;/sub&gt; capture and N&lt;sub&gt;2&lt;/sub&gt;O decomposition, thus CaCO&lt;sub&gt;3&lt;/sub&gt; was found to be ineffective for N&lt;sub&gt;2&lt;/sub&gt;O decomposition. The present results imply that Calcium-Looping process is effective for mitigation of greenhouse gas emissions not only by CO&lt;sub&gt;2&lt;/sub&gt; capture but also N&lt;sub&gt;2&lt;/sub&gt;O reduction.&lt;/p&gt;

    DOI: 10.20550/jietaikaiyoushi.25.0_180

    CiNii Article

    researchmap

  • P-09 バイオマスタールの水蒸気改質における鉄系触媒の長寿命化(熱分解・ガス化,ポスター発表)

    李 留云, 松村 秀之, 清水 忠明, 金 煕濬, 里見 知香, 宝田 恭之

    バイオマス科学会議発表論文集11 ( 0 ) 67 - 68   2016年

     詳細を見る

    記述言語:英語   出版者・発行元:一般社団法人 日本エネルギー学会  

    A natural limonite ore is used as catalyst for tar reforming at 650 ℃. Researches on the catalytic role of the limonite ore, deactivation mechanism, influence of steam addition were conducted. The characteristics of the catalyst were analysed by X-ray diffraction (XRD) and scanning electron microscope (SEM). Effects of steam addition and the steam/carbon ratio on catalyst activity and lifetime were discussed.

    DOI: 10.20550/jiebiomassronbun.11.0_67

    CiNii Article

    researchmap

  • G1700104 北海道産泥炭の圧搾及び熱乾燥特性

    金 熙濬, 木村 宗平, 李 留云, 清水 忠明, 吉田 雅典

    年次大会2015 ( 0 ) _G1700104 - -_G1700104-   2015年

     詳細を見る

    記述言語:日本語   出版者・発行元:一般社団法人 日本機械学会  

    Recently, the consumptions of the fossil fuel are rapidly increased because of increasing population and economic growth in developing country. As the results, the Global warming by increasing in carbon dioxide and lack of the fossil fuel are concerned. We must do developing the new fossil fuel such as peat or brown coal. However, the peat or brown-coal had a problem with very high water content. Therefore we developed the economic drying processes for using peat as energy source. We studied the comparing a squeeze method (compression-dewatering method) and thermal drying method. From the results, we found that the squeeze method is economic process better than thermal drying method.

    CiNii Article

    researchmap

  • 1E04 学生の質問力向上に向けた取り組み((10)工学教育・システムの個性化・活性化-I,口頭発表)

    山際 和明, 田口 佳成, 多島 秀男, 三上 貴司, 李 留云, 小松 博幸

    工学教育研究講演会講演論文集2015 ( 0 ) 90 - 91   2015年

     詳細を見る

    記述言語:日本語   出版者・発行元:公益社団法人 日本工学教育協会  

    CiNii Article

    researchmap

  • No.4 石炭灰および石炭チャーの溶融挙動に対する残存炭素の影響(灰・微量元素(1)、重質油・バイオマス・コプロセッシング(1))

    神成 尚克, 三浦 裕貴, 宝田 恭之, 李 留云, 鈴木 伸行

    石炭科学会議発表論文集52 ( 0 ) 8 - 9   2015年

     詳細を見る

    記述言語:日本語   出版者・発行元:一般社団法人 日本エネルギー学会  

    In this study, we investigated the influences of carbon residue content in coal ash and coal char on the melting behaviors. The coal ashes and coal chars with different carbon content were prepared by the air oxidations of a coal char with different oxidation time. The melting behaviors of the prepared samples were evaluated by the shape changes during heat-treatment up to 1550℃ in a N_2 stream based on JIS M 8801. The results indicated the melting behavior strongly depended on the amount of residual carbon content; melting points increased with increasing the residual carbon content.

    CiNii Article

    researchmap

  • P-21 Limoniteを用いた木質系バイオマスタールの低温ガス化の検討(ガス化,Poster Session 1)

    坂井 裕美, 山内 理光, 清水 忠明, 金 煕濬, 李 留云

    バイオマス科学会議発表論文集10 ( 0 ) 89 - 90   2015年

     詳細を見る

    記述言語:日本語   出版者・発行元:一般社団法人 日本エネルギー学会  

    In a biomass gasification process, the separation of tar is brought into question to cause piping obstruction. Various catalysts are reported in tar reforming, but most of them are expensive, and difficult to be used in practice. Limonite is a cheap, natural mineral, which is reported to have high tar resolution performance. Basing on this, the low temperature operation for tar reforming could contribute to improvement of cold gas efficiency and the cost reduction. The biomass gasification was carried out in a fixed bed reactor at 400-700 ℃. As results, limonite improved the biomass tar gasification, and the gas yields increased notably with the temperature increasing. The hydrocarbons gasification was confirmed even at the low temperature of 400℃, there the hydrogen formation was observed.

    CiNii Article

    researchmap

  • 3-13-1 キノコ廃菌床の発酵乾燥(Session 3-13 発酵、乾燥等)

    清水 忠明, 小林 亮輝, 金 煕濬, 李 留云, 小浦方 格, 瀧澤 和彦, 眞島 以都男, 今井 明夫

    日本エネルギー学会大会講演要旨集23 ( 0 ) 158 - 159   2014年

     詳細を見る

    記述言語:日本語   出版者・発行元:一般社団法人 日本エネルギー学会  

    Enokitake (Flammulina velutipes) is one of the most popular cultivated mushrooms in Japan. A huge amount of waste culture is disposed thus its utilization as biomass fuel is needed. Due to high moisture content of waste mushroom culture, drying is necessary prior to use. As an approach for drying, compositing is proposed. Composters of various scale, from laboratory scale composter to semi-pilot scale composter (3 m^3 by volume) were operated. Temperature was measured during composting. A mathematical model is also proposed to predict the change in temperature.

    CiNii Article

    researchmap

  • No.45 カ焼ドロマイトとNi系触媒を併用したバイオマスタールの低温ガス化転換(重質油・バイオマス・コプロセッシング(4))

    大竹 洋平, Nur Hanani, A. RAHMAN, 李 留云

    石炭科学会議発表論文集51 ( 0 ) 90 - 91   2014年

     詳細を見る

    記述言語:日本語   出版者・発行元:一般社団法人 日本エネルギー学会  

    Nickel-based catalyst is known to be active on biomass tar reforming. However, nickel-based catalyst was found to be deactivated by coke fouling on the catalyst surface. Calcined dolomite is a low price natural mineral. It was found to be effective on coking resistance during tar steam reforming. In this study, light fuel gases were produced from biomass tar gasification using calcined dolomite and nickel-based catalyst. Catalytic gasification was performed in a fixed bed reactor at 650℃. Calcined dolomite was filled over nickel-based catalyst. As a result, coke deposits decreased compared to the case with nickel catalyst only.

    CiNii Article

    researchmap

  • 3-8-3 バイオマスの水蒸気半炭化に関する基礎研究(3-08(2) 乾燥・炭化,Session 3 バイオマス等)

    鈴木 伶緒馬, 安野 晴貴, 李 留云, 清水 忠明, 金 煕濬

    日本エネルギー学会大会講演要旨集22 ( 0 ) 114 - 115   2013年

     詳細を見る

    記述言語:日本語   出版者・発行元:一般社団法人 日本エネルギー学会  

    In this study, the effect of temperature is investigated in the vapor carbonization. When vapor is added, the amount of volatile material is increased comparing with only nitrogen.

    CiNii Article

    researchmap

  • 1-3-3 石炭及びバイオマス燃焼灰の溶融・蒸発特性(1-3 構造・物性等,Session 1 石炭・重質油等)

    佐藤 素子, 李 留云, 清水 忠明, 金 熙濬, Yao Hong

    日本エネルギー学会大会講演要旨集22 ( 0 ) 18 - 19   2013年

     詳細を見る

    記述言語:日本語   出版者・発行元:一般社団法人 日本エネルギー学会  

    In this study, the melting and evaporating characteristics of the brown-coal and biomass ash were invested. With increasing temperature, evaporating amount of ash was decreased to the all sample. The melting points of brown-coal and biomass ash are 1300℃ and subbituminous coal ash is 1600 ℃.

    CiNii Article

    researchmap

  • 5-1-3 低品位炭の流動層燃焼(5-1 燃焼・熱利用1,Session 5 燃焼・熱利用)

    丹羽 将基, 笠谷 裕一, 李 留云, 清水 忠明, 金 煕濬

    日本エネルギー学会大会講演要旨集22 ( 0 ) 218 - 219   2013年

     詳細を見る

    記述言語:日本語   出版者・発行元:一般社団法人 日本エネルギー学会  

    In this study, we controlled the emission concentration of the exhaust gas when brown-coal is burned in a fluidized bed. We compared the case of supplying the secondary air or not based on the primary air. As the results, we got that emission concentration of NOx and CO is decreased when secondary air is injected.

    CiNii Article

    researchmap

  • 3-4-1 鉄系触媒によるバイオマスタールの水蒸気ガス化(3-04 ガス精製2,Session 3 バイオマス等)

    山内 理光, 李 留云, 國井 洋雄, 金 煕濬, 清水 忠明

    日本エネルギー学会大会講演要旨集21 ( 0 ) 88 - 89   2012年

     詳細を見る

    記述言語:日本語   出版者・発行元:一般社団法人 日本エネルギー学会  

    In this study, light gases were produced from biomass tar gasification by using iron-based catalysts. Catalytic gasification was performed in a fixed bed reactor at 550 to 800℃. Hydrogen yield increased with temperature increasing from 550 to 600℃, but it decreased over 600℃. The tar decomposition was further improved with K_2CO_3 addition, which however gave little effect on the coke deposition at the present conditions.

    CiNii Article

    researchmap

  • No.45 キノコ廃菌床の燃料化(バイオマス(1))

    清水 忠明, 飯田 翔一, 佐藤 浩之, 佐藤 勇太, 金 煕濬, 李 留云, 小浦方 格, 滝沢 和彦, 今井 明夫

    石炭科学会議発表論文集49 ( 0 ) 88 - 89   2012年

     詳細を見る

    記述言語:日本語   出版者・発行元:一般社団法人 日本エネルギー学会  

    Enokitake (Flammulina velutipes) is one of the most popular cultivated mushrooms in Japan. A huge amount of waste culture is disposed thus its utilization as biomass fuel is needed. Due to high moisture content of waste mushroom culture, drying is necessary prior to use. As an approach for drying, compositing is proposed. A laboratory scale composter is operated. Change in temperature, CO_2 formation, and water evaporation with time was measured during composting. A mathematical model is also proposed to predict the change in temperature and moisture evaporation.

    CiNii Article

    researchmap

  • No.19 褐炭の燃焼特性に関する基礎研究(ガス化・燃焼・液化(2))

    齋藤 芳紀, 清野 聡平, 笠谷 裕一, 金 煕濬, 清水 忠明, 李 留云

    石炭科学会議発表論文集49 ( 0 ) 38 - 39   2012年

     詳細を見る

    記述言語:日本語   出版者・発行元:一般社団法人 日本エネルギー学会  

    In this study, the combustion and pyrolysis of brown coal have been done. Combustion/pyrolysis rate had been investigated. As the result, the pyrolytic mass change varies according to the temperature in the furnace. The pyrolytic activation energy is divided into two stages. The activation energy is for 300〜400and 400〜800℃ are 5.2 and 39.8kJ/mol , respectively.

    CiNii Article

    researchmap

  • 5-1-1 褐炭及びバイオマス灰の溶融挙動に関する基礎研究(5-1 燃焼・熱利用1,Session 5 燃焼・熱利用)

    安野 晴貴, 小檜山 成一郎, 李 留云, 清水 忠明, 金 煕濬

    日本エネルギー学会大会講演要旨集21 ( 0 ) 260 - 261   2012年

     詳細を見る

    記述言語:日本語   出版者・発行元:一般社団法人 日本エネルギー学会  

    In this study, melting behavior of the brown-coal ash and biomass ash were studied. Mass change of ash with increasing temperature was measured and melting characteristics were observed. As the results, we obtained evaporation rate of ash and melting points. The melting point of biomass ash is 1200℃ and subbituminous coal ash is 1600℃.

    CiNii Article

    researchmap

  • 圧搾および熱によるキノコ廃菌床の乾燥特性

    山田 健太, 李 留云, 清水 忠明, 金 熙濬

    廃棄物資源循環学会研究発表会講演集23 ( 0 )   2012年

     詳細を見る

    出版者・発行元:一般社団法人 廃棄物資源循環学会  

    現在、キノコ廃菌床は農林系廃棄物として廃棄されている。廃棄物として扱われているこのキノコ廃菌床をバイオエネルギー資源として利用可能であれば、キノコ産業にとっては廃棄処理費用の節約と工場内エネルギー使用量の削減を同時に達成できる。廃菌床を経済性あるエネルギー源にするためには、低コストで含水率を下げる必要がある。キノコ廃菌床の脱水特性を明らかにすることができれば、エネルギーとして利用する際の費用削減や装置の設計に貢献できると考えられる。廃菌床の含水率を下げる方法として、一般的に自然乾燥法、機械的脱水法、熱乾燥法がある。しかし、自然乾燥法は最も低コストに乾燥できる方法であるが、乾燥時間が長いこと、周辺への悪臭問題、季節依存性等の問題点がある。そこで、本研究では、低コスト乾燥方法として機械的脱水法と熱乾燥法を組み合わせることに着目し、圧搾による脱水特性と熱乾燥による乾燥特性に関する実験を行った。

    CiNii Article

    researchmap

  • 7-4-4 汚泥の圧搾及び乾燥特性(7-4 リサイクル3,Session7 環境対策・リサイクル,研究発表)

    五十嵐 吉幾, 李 留云, 清水 忠明, 金 熙濬

    日本エネルギー学会大会講演要旨集20 ( 0 ) 324 - 325   2011年

     詳細を見る

    記述言語:日本語   出版者・発行元:一般社団法人 日本エネルギー学会  

    In this study, the drying of sewage sludge has been done by the mechanical compressing method and the thermal drying method. The mechanical compressing method has a higher efficiency than thermal method from 100% to 50% in the water content. However the thermal drying has higher efficiency than the mechanical method in below 50%. In thermal drying, drying mechanism had been changed at 373K. The activation energy is 27kJ/mol in the range 323-373 K and 16kJ/mol in the range 373-574K.

    CiNii Article

    researchmap

  • 3-1-4 バイオマスタールの接触ガス化による軽質ガスの生成(3-1 液体燃料・評価,Session3 バイオマス等,研究発表)

    國井 洋雄, 李 留云, 清水 忠明, 金 熙濬

    日本エネルギー学会大会講演要旨集20 ( 0 ) 66 - 67   2011年

     詳細を見る

    記述言語:日本語   出版者・発行元:一般社団法人 日本エネルギー学会  

    In this study, light gases were produced from biomass tar gasification by using limonite and dolomite, as catalysts. Catalytic gasification was performed in a fixed bed reactor at 600-800℃. Hydrogen yield was increased with temperature increasing among 650-800℃, because the water shift reaction was promoted by catalyst. Hydrogen gas doubled its yield under the limonite and dolomite mixture compared to limonite only.

    CiNii Article

    researchmap

  • 1-1-3 褐炭の燃焼特性に関する基礎研究(1-1 微量元素・燃焼,Session1 石炭・重質油等,研究発表)

    笠谷 裕一, 李 留云, 清水 忠明, 金 熙濬

    日本エネルギー学会大会講演要旨集20 ( 0 ) 6 - 7   2011年

     詳細を見る

    記述言語:日本語   出版者・発行元:一般社団法人 日本エネルギー学会  

    In this study, the combustion and pyrolosis of brown coals and mushroom waste have been done. Combustion/ pyrolysis rate and emission of hydrocarbon component had been investigated. As the results, activation energy is 900 in char combustion step and in volatile combustion step. The emission amount of hydrocarbon components were increased with decreasing oxygen concentration and increasing furnace temperature.

    CiNii Article

    researchmap

  • 11-111 プラント模型作りを組み込んだ化学設計製図((12)エンジニアリング・デザイン-II,口頭発表論文)

    吉田 雅典, 多島 秀男, 田口 佳成, 李 留云, 山際 和明

    工学教育研究講演会講演論文集2011 ( 0 ) 236 - 237   2011年

     詳細を見る

    記述言語:日本語   出版者・発行元:公益社団法人 日本工学教育協会  

    CiNii Article

    researchmap

  • 3-2-3 Ni-Mg/Al2O3を用いた豚糞のガス化と炭素析出挙動(3-2 ガス化2,Session 3 バイオマス等,研究発表)

    高橋 望, 高草木 啓太, 李 留云, 宝田 恭之, 松井 雅義, 尾崎 純一

    日本エネルギー学会大会講演要旨集19 ( 0 ) 86 - 87   2010年

     詳細を見る

    記述言語:日本語   出版者・発行元:一般社団法人 日本エネルギー学会  

    Carbon deposition behavior and gasification activity of a Ni-Mg/Al_2O_3 catalyst was investigated. The onset of carbon deposition was shifted to higher temperature compared to a conventional Ni/Al_2O_3 catalyst, which meant no deposition occurred in the targeted temperature region. The gasification activity of swine excrement compost was almost the same as the conventional catalyst.

    CiNii Article

    researchmap

  • Fast pyrolysis of sewage sludge: Nitrogen-containing species in products

    曹 景沛, 李 留云, 肖 顕斌, 森下 佳代子, 宝田 恭之

    化学工学会 研究発表講演要旨集2009 ( 0 ) 896 - 896   2009年

     詳細を見る

    出版者・発行元:公益社団法人 化学工学会  

    CiNii Article

    researchmap

  • Catalytic Behavior of a Novel Nickel-Loaded Brown Coal Char on Decomposition of Swine Compost Volatiles at Comparatively Low Temperature

    李 留云, Xiao Xianbin, 曹 景沛, 森下 佳代子, 宝田 恭之

    化学工学会 研究発表講演要旨集2009 ( 0 ) 897 - 897   2009年

     詳細を見る

    出版者・発行元:公益社団法人 化学工学会  

    CiNii Article

    researchmap

  • Investigation on Deactivation and Regeneration of a Commercial Ni/Al2O3 Catalyst in Coal Volatile Decomposition

    Liuyun Li, Jun-ichi Ozaki, Kayoko Morishita, Chiemi Ida, Masaaki Takei, Takayuki Takarada

    JOURNAL OF CHEMICAL ENGINEERING OF JAPAN41 ( 9 ) 915 - 922   2008年9月

     詳細を見る

    記述言語:英語   出版者・発行元:SOC CHEMICAL ENG JAPAN  

    The deactivation mechanism of a commercial Ni/Al2O3 catalyst used during coal volatile decomposition was investigated by transmission electron microscopy-energy dispersive X-ray spectroscopy (TEMEDS), X-ray diffraction (XRD) and nitrogen adsorption. The existence of carbonous species in the reaction system promoted nickel particle growth during coal volatile decomposition, and subsequent coking from volatile cracking. Throughout the catalyst deactivation tests, coke deposits were observed as encapsulating carbon in the spent catalyst, and nickel particles doubled in size from around 10 to 20 urn. The spent catalyst was regenerated in oxygen at relatively moderate conditions by removing the coke deposits. As a result, the catalyst activity was restored remarkably; 1.7 times the surface area and double pore volume were present in the regenerated catalyst compared to the spent catalyst. Also, the regenerated catalyst showed high activity for coal volatile decomposition. Under catalysis of the regenerated Ni/Al2O3 the tarry material in coal volatile matter could transform much more completely, gaining both high gas yields and high carbon balance.
    We also found that methanation is structure sensitive to nickel particles. Under the action of the regenerated catalyst, CO formed during coal volatile decomposition could not be further converted into methane, and the product gases provided a higher CO concentration. Noticeably, tar decomposition was confirmed to be less structure sensitive to the nickel particles than CO-methanation.

    DOI: 10.1252/jcej.08we047

    Web of Science

    CiNii Article

    researchmap

  • 25 バイオマス低温ガス化触媒Ni-MgO/Al_2O_3の炭素析出による失活挙動に関する研究(ガス化・燃焼(1))

    高草木 啓太, 武井 雅朗, 李 留云, 森下 佳代子, 宝田 恭之, 尾崎 純一

    石炭科学会議発表論文集45 ( 0 ) 50 - 51   2008年

     詳細を見る

    記述言語:日本語   出版者・発行元:一般社団法人 日本エネルギー学会  

    In the present study, suppression of carbon deposition onto Ni/Al_2O_3 catalysts were investigated by means of addition of co-catalyst Mg. Particularly, the order of the addition of catalytic constituents, Ni and Mg, were studied.

    CiNii Article

    researchmap

  • P-105 豚糞コンポストタールの低温接触分解におけるニッケル担持褐炭チャーの触媒効果(ポスター発表)

    李 留云, 森下 佳代子, 宝田 恭之

    バイオマス科学会議発表論文集3 ( 0 ) 52 - 53   2008年

     詳細を見る

    記述言語:英語   出版者・発行元:一般社団法人 日本エネルギー学会  

    Low-temperature catalytic gasification for swine compost is developed. The catalytic gasification was conducted in a two-stage quartz fixed bed. Ni loading brown coal (Ni-LY) was prepared and employed as a catalyst for livestock compost tar gasification. The results show that the Ni-LY performed high activity on the swine compost tar decomposition. Light product gases were gained at catalytic temperatures of 450, 550 and 650℃. Steam gasification of the tar was catalyzed resulting in hydrogen gas yield increase by approximately 2 times.

    CiNii Article

    researchmap

  • 35 バイオマスタールモデル物質を用いた褐炭担持Ni触媒の炭素析出劣化に対する検討(ガス化・燃焼(4))

    武井 雅朗, 李 留云, 森下 佳代子, 宝田 恭之, 尾崎 純一

    石炭科学会議発表論文集45 ( 0 ) 70 - 71   2008年

     詳細を見る

    記述言語:日本語   出版者・発行元:一般社団法人 日本エネルギー学会  

    In the low-temperature biomass gasification, deactivation of the catalyst by carbon deposition is a serious problem due to the cost. In this study, we conducted a study on the carbon deposition onto Ni-supported coal catalyst from several model organic compounds to observe the difference in the carbon deposition behavior from that of a commercial Ni/Al_2O_3 catalyst.

    CiNii Article

    researchmap

  • Light fuel gas production from nascent coal volatiles using a natural limonite ore

    Liuyun Li, Kayoko Morishita, Takayuki Takarada

    Fuel86 ( 10-11 ) 1570 - 1576   2007年7月

     詳細を見る

    記述言語:英語  

    Basic research on fuel gas production from nascent coal volatiles was conducted in a two-stage fixed-bed reactor. The volatiles from coal carbonization decomposed in the reactor. Indonesian natural limonite ore dramatically promoted coal volatile decomposition at 873-1023 K in ambient pressure and the carbon yields, except in tar, were above 97.8%. We compared these results to experiments without a catalyst. Subsequently, coal tar converted more completely and more than twice the amount of methane-rich product gases were obtained using the limonite catalyst. In addition, catalyst sulphur poisoning was scarcely observed in the H2S-H2-N2 (H2S/H2: 0.002-0.004) system at 923 K. © 2006 Elsevier Ltd. All rights reserved.

    DOI: 10.1016/j.fuel.2006.10.024

    Scopus

    CiNii Article

    researchmap

  • 畜産廃棄物コンポストの低温接触改質のための安価な触媒開発

    森下 佳代子, 岩田 融, 李 留云, 宝田 恭之

    化学工学会 研究発表講演要旨集2007 ( 0 ) 155 - 155   2007年

     詳細を見る

    記述言語:日本語   出版者・発行元:公益社団法人 化学工学会  

    DOI: 10.11491/scej.2007.0.155.0

    CiNii Article

    researchmap

  • 3-23 畜産廃棄物コンポスト低温水蒸気ガス化のための安価な触媒開発((7)ガス化6,Session 3 バイオマス等,研究発表(口頭発表))

    森下 佳代子, 岩田 融, 李 留云, 宝田 恭之

    日本エネルギー学会大会講演要旨集16 ( 0 ) 148 - 149   2007年

     詳細を見る

    記述言語:日本語   出版者・発行元:一般社団法人 日本エネルギー学会  

    CiNii Article

    researchmap

  • 17 褐炭-畜産汚水-無電解めっき廃液によるニッケルイオン交換担持褐炭の調製(褐炭利用,熱分解ガス,鉱物構造)

    高橋 直紀, 森下 佳代子, 宝田 恭之, 李 留云

    石炭科学会議発表論文集44 ( 0 ) 34 - 35   2007年

     詳細を見る

    記述言語:日本語   出版者・発行元:一般社団法人 日本エネルギー学会  

    Brown coal has many oxygen-containing functional groups such as carboxyl groups and it is ion-exchangeable with metal. We prepared Ni ion-exchanged brown coal with mixture of swine wastewater and waste liquid from electroless nickel plating, and examined the activity for tar decomposition.

    CiNii Article

    researchmap

  • 48 バイオマスガス化触媒の炭素析出劣化に関する研究(バイオマス)

    武井 雅朗, 李 留云, 森下 佳代子, 宝田 恭之, 尾崎 純一

    石炭科学会議発表論文集44 ( 0 ) 94 - 95   2007年

     詳細を見る

    記述言語:日本語   出版者・発行元:一般社団法人 日本エネルギー学会  

    In the low-temperature biomass gasification, deactivation of the catalyst by carbon deposition is a serious problem due to the cost. In this study, we conducted a study on the carbon deposition onto Ni/Al_2O_3 catalyst from C_6-hydrocarbon as model compound to observe the differences in the carbon deposition behavior and in the forms of the deposits.

    CiNii Article

    researchmap

  • Conversion of hot coke oven gas into light fuel gas over Ni/Al2O3 catalyst

    Liuyun Li, Kayoko Morishita, Takayuki Takarada

    JOURNAL OF CHEMICAL ENGINEERING OF JAPAN39 ( 4 ) 461 - 468   2006年4月

     詳細を見る

    記述言語:英語   出版者・発行元:SOC CHEMICAL ENG JAPAN  

    Conversion of hot coke oven gas (COG, containing tarry material) into light fuel gas over a Ni/Al2O3 catalyst was studied. Laboratory scale tests were carried out in a two-stage fixed-bed reactor at ambient pressure. The nickel catalyst promoted the hydropyrolysis reaction of tarry materials. High yields of total product gas and methane were obtained at high hydrogen concentrations. If the hydrogen supply was adequate for hydropyrolysis of the tarry material, conversion of coal volatiles was high, at more than 95% on carbon balance, even with a gas residence time as short as 0.15 s in the catalyst bed. The product gas yield depended on catalytic temperature. At 923 K, the maximum conversion of coal volatiles into the light gas was achieved at 95.0% on carbon balance, with methane 86.7 vol% of the carbonaceous gas product. Although carbon deposits deactivated the catalyst after a long period of use, the catalyst could be regenerated by treatment with oxygen at 800 K, providing high activity in subsequent decomposition of tarry material. The influence of sulphide on the tarry material decomposition reaction was small even in a 2000 ppm H2S atmosphere.

    DOI: 10.1252/jcej.39.461

    Web of Science

    CiNii Article

    researchmap

  • 33. Ni担持褐炭を利用したバイオマスタールの低温接触水蒸気改質

    李 留云, 森下 佳代子, 宝田 恭之

    石炭科学会議発表論文集43 ( 0 ) 67 - 68   2006年

     詳細を見る

    記述言語:日本語   出版者・発行元:一般社団法人 日本エネルギー学会  

    Two kinds of biomass samples, chicken feces compost and cypress, were employed for pyrolysis in our study. Experiments were carried out in a two-stage fixed-bed reactor. The biomass sample was pyrolyzed in the first stage, and the biomass tar from biomass pyrolysis flowed into another stage with the feed gas for catalytic decomposition and steam-reforming. A Ni-loading brown coal and a commercial catalyst Ni/Al_2O_3 were used as catalysts. Both of the catalysts promoted the biomass tar complete conversion into gas products even at a low reaction temperature of 500℃. Comparing with the case of pyrolysis, yields of hydrogen and carbon monoxide gases showed a remarkable increase in the steam-reforming reactions.

    CiNii Article

    researchmap

  • 45.石炭タールの水素化分解反応におよぼす鉄系触媒添加効果

    李 留云, 森下 佳代子, 宝田 恭之

    石炭科学会議発表論文集42 ( 0 ) 93 - 94   2005年

     詳細を見る

    記述言語:英語   出版者・発行元:一般社団法人 日本エネルギー学会  

    Catalytic behaviour of iron-based catalysts on hydropyrolysis of nascent coal tar was studied using a two-stage fixed-bed reactor in ambient pressure. An Indonesian natural limonite ore was mainly employed as a representative iron catalyst at a temperature from 873K to 1023K and in 50 vol. % hydrogen atmosphere. The limonite catalyst exhibited a great activity on coal volatile methanation that methane concentration in carbonaceous gas product was achieved higher than 60% in volume and tarry material was converted almost completely. Comparing with two other iron-containing catalysts, Fe/Al_2O_3 and bof dust, limonite with a high specific surface area showed a high catalytic activity on tarry material hydropyrolysis. The influence of sulphur poisoning on the limonite catalyst was small. Carbonaceous gas products obtained in a 2000ppm H_2S atmosphere with limonite were still up to twice the total gas yield and twice methane yield (in moles) of those without catalyst at 923K.

    CiNii Article

    researchmap

  • 57.Ni担持褐炭を用いたバイオマスの低温接触混合ガス化

    森下 佳代子, 佐藤 美歩, 齋藤 美季, 李 留云, 宝田 恭之

    石炭科学会議発表論文集41 ( 0 ) 119 - 120   2004年

     詳細を見る

    記述言語:日本語   出版者・発行元:一般社団法人 日本エネルギー学会  

    In this study, it was investigated to use of Ni ion-exchanged brown coal as a catalyst for efficient biomass gasification. Using Ni ion-exchanged brown coal, tarry material produced by pyrolysis of biomass was easily decomposed at relatively lower temperature like as 550 and 650C, and the product gas yields were increased.

    CiNii Article

    researchmap

  • 52.各種触媒を用いたCOG中タールの分解

    李 留云, 森下 佳代子, 宝田 恭之

    石炭科学会議発表論文集41 ( 0 ) 109 - 110   2004年

     詳細を見る

    記述言語:日本語   出版者・発行元:一般社団法人 日本エネルギー学会  

    The decomposition of tarry material included in COG to produce light gas was studied in this study. Ni/Al_2O_3, Fe (limonite) particle catalysts and Ni/Al_2O_3 honeycomb catalyst were employed. Catalyst bed temperature was controlled between 600℃ to 900℃. Although the activity of Fe catalyst was slightly weaker than that of Ni catalyst, tarry material completely converted into gaseous production under Fe catalyst. Both Ni and Fe catalyst had great activities on tarry material decomposition. Ni/Al_2O_3 honeycomb catalyst was as active as Ni/Al_2O_3 particle catalyst.

    CiNii Article

    researchmap

  • 1-23.COG中タールの接触改質におよぼす水蒸気添加効果((6)重質油ガス化等,Session 1 石炭・重質油等)

    李 留云, 森下 佳代子, 宝田 恭之

    日本エネルギー学会大会講演要旨集12 ( 0 ) 68 - 69   2003年

     詳細を見る

    記述言語:日本語   出版者・発行元:一般社団法人 日本エネルギー学会  

    CiNii Article

    researchmap

▶ 全件表示

共同研究・競争的資金等の研究

  • 石炭、バイオマス、畜産廃棄物、低温ガス化、接触改質分解、燃料ガス製造、エネルギー回収

      詳細を見る

    資金種別:競争的資金

    researchmap

  • -

      詳細を見る

    資金種別:競争的資金

    researchmap