2022/12/05 更新

写真a

コマツ ヒロユキ
小松 博幸
KOMATSU Hiroyuki
所属
教育研究院 自然科学系 生産デザイン工学系列 助教
工学部 工学科 助教
職名
助教
外部リンク

学位

  • 博士(環境科学) ( 2014年3月   東北大学 )

  • 修士(環境科学) ( 2011年3月   東北大学 )

  • 学士(工学) ( 2009年3月   東北大学 )

研究分野

  • 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)

  • 新潟大学   工学部 工学科   助教

    2017年4月 - 現在

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  • 東北大学   流体研究所   共同研究員

    2015年4月 - 現在

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  • 新潟大学   工学部 化学システム工学科 生産化学工学   助教

    2014年4月 - 2017年3月

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  • 東北大学大学院環境科学研究科   Graduate School of Environmental Studies   日本学術振興会特別研究員 (DC1)

    2011年4月 - 2014年3月

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経歴

  • 新潟大学   工学部 工学科   助教

    2017年4月 - 現在

  • 新潟大学   生産化学工学   助教

    2014年4月 - 2017年3月

学歴

  • 東北大学   環境科学研究科   環境科学専攻 環境化学・生態学コース 博士課程後期

    2011年4月 - 2014年3月

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    国名: 日本国

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  • 東北大学大学院   環境科学研究科   環境科学専攻 環境化学・生態学コース 博士課程前期

    2009年4月 - 2011年3月

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  • 東北大学   工学部   化学・バイオ工学科

    2005年4月 - 2009年3月

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所属学協会

 

論文

  • Feasibility of additive winterization of biodiesel fuel derived from various eatable oils and fat

    Hideo Tajima, Masahiro Abe, Hiroyuki Komatsu, Kazuaki Yamagiwa

    Fuel   305   121479 - 121479   2021年12月

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    掲載種別:研究論文(学術雑誌)   出版者・発行元:Elsevier BV  

    DOI: 10.1016/j.fuel.2021.121479

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  • Flow characteristics of hydrofluorocarbon gas hydrate slurries under various conditions in a loop tube

    Ryosuke Ezure, Tomoya Sagawa, Tatsuya Horiguchi, Yuma Arai, Hiroyuki Komatsu, Kazuaki Yamagiwa, Hideo Tajima

    Chemical Engineering Science   246   116974 - 116974   2021年12月

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    掲載種別:研究論文(学術雑誌)   出版者・発行元:Elsevier BV  

    DOI: 10.1016/j.ces.2021.116974

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  • Effect of additive structure on the performance of biodiesel fuel winterization

    Masahiro Abe, Ryosuke Nakamura, Hiroyuki Komatsu, Kazuaki Yamagiwa, Hideo Tajima

    Fuel   289   119747 - 119747   2021年4月

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    掲載種別:研究論文(学術雑誌)   出版者・発行元:Elsevier BV  

    DOI: 10.1016/j.fuel.2020.119747

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  • Evaluation of rate-determining step of methane hydrate decomposition by measurement of transient heat and mass transfer near solid–gas interface 査読

    Yuki Kanda, Hiroyuki Komatsu, Junnosuke Okajima, Shigenao Maruyama, Atsuki Komiya

    International Journal of Heat and Mass Transfer   149   2020年3月

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    掲載種別:研究論文(学術雑誌)  

    © 2019 The transient heat and mass transfer near a methane hydrate decomposition interface were quantitatively measured to evaluate the rate-determining factors of dissociation with high spatiotemporal resolution. In this study, we proposed a measurement system for the dissociation phenomenon near the hydrate interface, and the rate-determining step of the dissociation phenomenon was discussed in terms of the experimental results and numerical simulation using a dissociation model. The hydrate was generated around a water-like film under temperature of 274 K and pressure of 4.8 MPa of mixed gas comprising methane and helium in a temperature and pressure controlled system. A high-speed phase-shifting interferometer was used to measure the interfacial transient heat and mass transfer. In the present study, transient variations in the optical path length difference caused by the variation in the density field near the hydrate interface were visualized with temporal and spatial resolutions of 1 ms and 3.88 μm/pixel, respectively. The measured values were compared with the results of numerical simulations, assuming that the mass flux of methane was a function of the activation energy of dissociation. The comparison showed that the experimentally measured values exhibited similar tendency as the values estimated using the activation energy of approximately 60,000 J/mol. This result was also confirmed from the interface shape variation of the hydrate. Finally, the dissociation phenomenon of the hydrate was estimated as the rate-determining step of the reaction by using our special interferometer system.

    DOI: 10.1016/j.ijheatmasstransfer.2019.119191

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  • A precise deconvolution method to derive methane hydrate cage occupancy ratios using Raman spectroscopy 査読

    Hiraga, Y., Sasagawa, T., Yamamoto, S., Komatsu, H., Ota, M., Tsukada, T., Smith, R.L.

    Chemical Engineering Science   214   115361 - 115361   2020年

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    掲載種別:研究論文(学術雑誌)   出版者・発行元:Elsevier BV  

    DOI: 10.1016/j.ces.2019.115361

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  • Evaluation of the gas absorption performance of a flow-type hydrate-based gas uptake system 査読

    Ezure, R., Matsumoto, Y., Takano, S., Shimizu, M., Komatsu, H., Yamagiwa, K., Tajima, H.

    Chemical Engineering Research and Design   156   2020年

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    掲載種別:研究論文(学術雑誌)  

    DOI: 10.1016/j.cherd.2020.01.031

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  • Separation processes for carbon dioxide capture with semi-clathrate hydrate slurry based on phase equilibria of CO2 + N-2 + tetra-n-butylammonium bromide plus water systems 査読

    Komatsu H, Maruyama K, Yamagiwa K, Tajima H

    Chemical Engineering Research and Design   150   289 - 298   2019年

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    掲載種別:研究論文(学術雑誌)  

    DOI: 10.1016/j.cherd.2019.08.007

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  • Methane clathrate hydrate dissociation analyzed with Raman spectroscopy and a thermodynamic mass transfer model considering cage occupancy 査読

    Komatsu H, Sasagawa T, Yamamoto S, Hiraga Y, Ota M, Tsukada T, Smith R.L

    Fluid Phase Equilibria   489   41 - 47   2019年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1016/j.fluid.2019.02.004

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    その他リンク: http://orcid.org/0000-0002-8836-1294

  • Effects of hydrate-slurry decomposition conditions on gas generation and recovery performance 査読

    Hideo Tajima, Miki Hattori, Hikaru Akagami, Hiroyuki Komatsu, Kazuaki Yamagiwa

    Chemical Engineering Research and Design   134   497 - 506   2018年6月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Institution of Chemical Engineers  

    Many studies have been conducted on the application of hydrate-based gas separation to recover or reduce greenhouse-gas emissions. We evaluated the effects of hydrate-slurry decomposition conditions, specifically depressurization and heating, on gas recovery and separation, by using mixtures of refrigerants R22 or R134a with N2 as models of a greenhouse gas and a low-pressure gas, respectively. The recoveries of R22 and R134a were assessed and N2 was released preferentially during the earlier stage of decomposition, such that the highest N2 recovery rate was obtained during that time span. In contrast, the recovery rates of the target gases increased gradually with time up to maximum values. Pressure and temperature had a minimal effect on the N2 recovery rate, whereas the target gas-recovery rates were highly dependent on decomposition pressure and temperature values. The maximum separation factors were approximately 50 for R22 and 20 for R134a. A mechanism for the variation in separation factor is proposed, based on an analysis of gas generation as a function of decomposition time and fluid temperature.

    DOI: 10.1016/j.cherd.2018.04.030

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    その他リンク: http://orcid.org/0000-0002-8836-1294

  • Evaluation of the separation of saturated fatty acid methyl esters obtained from additive winterization using a nonionic surfactant 査読

    Masahiro Abe, Hiroyuki Komatsu, Kazuaki Yamagiwa, Hideo Tajima

    FUEL   214   607 - 613   2018年2月

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    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  

    Winterization is one means of improving the low temperature flow properties of biodiesel fuel, by the separation of saturated FAMEs. Additives are also employed to improve separation in the winterization process by modifying the crystallization behavior. This process is referred to as additive winterization. In a previous study, we investigated a novel additive winterization method in which FAMEs are separated without agitation during cooling, allowing improved separation of saturated FAME and unsaturated FAME mixtures. This method is both facile and energy-efficient because vacuum filtration is not required. In this study, we examined the effects of additives (sorbitan mono fatty acids) and agitation on the separation of saturated FAMEs from saturated and unsaturated FAME mixtures via winterization. The additive winterization process resulted in significant improvements in the cloud points of the FAME mixtures following a single separation run, with the cloud point being decreased by 8 K under optimum conditions. In contrast, winterization based on agitation required at least two cycles of sequential cooling, agitation and filtration to obtain similar results. This study therefore highlights the potential of additive winterization using sorbitan mono fatty acid esters to enhance the low-temperature flow properties of biodiesel fuels based on a simple process with reduced energy expenditures.

    DOI: 10.1016/j.fuel.2017.11.066

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    その他リンク: http://orcid.org/0000-0002-8836-1294

  • Effect of nonionic surfactants on the low temperature winterization separation of fatty acid methyl ester mixtures 査読

    Masahiro Abe, Hiroyuki Komatsu, Kazuaki Yamagiwa, Hideo Tajima

    FUEL   190   351 - 358   2017年2月

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    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 work investigated the removal of saturated fatty acid methyl esters (FAMEs) from FAME mixtures by winterization, employing additives as solid-liquid phase separation improvers during the cooling process. Model mixtures were prepared by blending saturated FAMEs (methyl palmitate and methyl stearate) and an unsaturated FAME (methyl oleate). Sorbitan monopalmitate (Span40) and Sorbitan monostearate (Span60) were selected as separation improvers because their molecular structures were close to those of the saturated FAME in the model mixture. These additives were found to improve the solid-liquid phase separation of FAME mixtures. Four different solid phases were observed during winterization, depending on the additive concentration: a solid wax, a solid incorporating small amounts of liquid, a large crystal agglomeration, and a slurry of fine particles. The formation of the large crystal agglomeration made it easier to perform solid-liquid separation via decantation, such that the saturated FAME was readily removed from the liquid phase when employing the optimum additive concentration. When the additive had an equal or longer carbon chain length compared with the saturated FAME, a greater extent of low temperature separation was obtained. These results will be helpful to the future development of the additive winterization process. (C) 2016 Elsevier Ltd. All rights reserved.

    DOI: 10.1016/j.fuel.2016.10.124

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    その他リンク: http://orcid.org/0000-0002-8836-1294

  • Thermodynamic selection of effective additives to improve the cloud point of biodiesel fuels 査読

    Masahiro Abe, Shiori Hirata, Hiroyuki Komatsu, Kazuaki Yamagiwa, Hideo Tajima

    FUEL   171   94 - 100   2016年5月

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    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  

    We assessed a simple thermodynamic model, with the aim of identifying biodiesel fuel cloud point (CP) improving additives, by predicting the CP values of fatty acid methyl esters with additives. The results showed that the molar mass of the additive has a significant effect in terms of improving the CP; the melting point and fusion enthalpy of the additive, however, produce lesser effects. On the basis of these results, we selected the additives tert-butyl alcohol, 2-butanol, cineol, 2-decanol, 2-decanone and oleyl alcohol, and examined their effects on the CP of a model biodiesel fuel (a methyl oleate and methyl palmitate mixture). The same trials were carried out using fatty acid methyl ester mixtures derived from commercial cooking oils. As predicted, the selected test additives decreased the sample CP values, with the optimum reduction obtained when using 10 wt.% of the additive. The results demonstrate that additives capable of improving the CP can be readily screened using a simple thermodynamic model. (C) 2015 Elsevier Ltd. All rights reserved.

    DOI: 10.1016/j.fuel.2015.12.053

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    その他リンク: http://orcid.org/0000-0002-8836-1294

  • Hydrogen and carbon dioxide adsorption with tetra‐<i>n</i>‐butyl ammonium semi‐clathrate hydrates for gas separations 査読

    Hiroyuki Komatsu, Masaki Ota, Yoshiyuki Sato, Masaru Watanabe, Richard, L. Smith J

    AICHE JOURNAL   61 ( 3 )   992 - 1003   2015年3月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    Gas adsorption rates of H&lt;sub&gt;2&lt;/sub&gt;, CO&lt;sub&gt;2&lt;/sub&gt;, and H&lt;sub&gt;2&lt;/sub&gt;-CO&lt;sub&gt;2&lt;/sub&gt; gas mixture (H&lt;sub&gt;2&lt;/sub&gt;/CO&lt;sub&gt;2&lt;/sub&gt;=3.4) with tetra-n-butyl ammonium salt (bromide, chloride, and fluoride) semi-clathrate hydrate particles were measured at 269 K to assess their properties for gas separation. Equilibrium gas occupancies in the S-cages of the particles were in order of (high to low) for hexagonal structure-I, tetragonal structure-I, and superlattice of cubic structure-I structures with the maximum fractional occupancy by CO&lt;sub&gt;2&lt;/sub&gt; being about 40%. The CO&lt;sub&gt;2&lt;/sub&gt; diffusion rate depended on the anion size of the salt, which is attributed to distortion of the S-cage that is close to the molecular size of CO&lt;sub&gt;2&lt;/sub&gt;. Simulations of semi-clathrate hydrate particles with theory showed that H&lt;sub&gt;2&lt;/sub&gt;/CO&lt;sub&gt;2&lt;/sub&gt; selectivities could be as high as 36 (3.0 mol% TBAF) and that selectivities for an ideal membrane (3.3 mol% TBAF) could be &gt;100 (269 K, 0.3-4.5 MPa). Semi-clathrate hydrates have wide application as separation media for gas mixtures.

    DOI: 10.1002/aic.14689

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    その他リンク: http://orcid.org/0000-0002-8836-1294

  • Multiple adsorption resistance model for constituent molecular effects in hydrogen clathration kinetics in clathrate hydrate particles 査読

    Hiroyuki Komatsu, Masaki Ota, Yoshiyuki Sato, Masaru Watanabe, Richard L. Smith

    CHEMICAL ENGINEERING SCIENCE   108   270 - 282   2014年4月

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    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  

    Adsorption rates are reported for H-2-tetrahydroluran (THE), H-2-THF (D2O), H-2-THF-d8, H-2-furan, H-2-cyclopentane (CP) and H-2-tetrahydrothiophene (THT) binary clathrate hydrates at temperatures of 265273 K and pressures of 4-10 MPa. Adsorption rates of H-2-furan and H-2-6.8 mol% THE binary clathrate hydrates were the fastest among these binary clathrate hydrates. The lattice constant of hydrates were determined to analyze the adsorption data with a newly proposed multiple adsorption resistance (MAR) model. The effect of the non-included additive guest molecule on hydrogen adsorption rate was important because they promoted formation of pores and grain boundaries when hydrate particles formed. Activation energies, Delta E-Da, for H-2 diffusion into clathrate hydrates calculated from the Arrhenius plots depended on the hydrate guest additive and were determined to be: 18.0 kJ/mol (6.2 mol% THF), 30.7 kJ/mol (5.6 mol% THF), and 100 kJ/mol (cyclopentane). Based on the Delta E-Da) values, H-2 diffusion pathway in hydrate particles depends on the clathrate hydrate formation process and the interactions between guest additive molecule and the host molecule. (C) 2014 Elsevier Ltd. All rights reserved,

    DOI: 10.1016/j.ces.2014.01.001

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    その他リンク: http://orcid.org/0000-0002-8836-1294

  • ガス分離プロセス開発に向けたクラスレートハイドレートに おけるH<sub>2</sub>とCO<sub>2</sub>の平衡吸着および拡散特性に関する研究

    小松 博幸

    2014年3月

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    記述言語:英語  

    水素精製時におけるガス分離プロセス構築を対象とし,添加第四級アンモニウム塩のアニオンがH&lt;sub&gt;2&lt;/sub&gt;およびCO&lt;sub&gt;2&lt;/sub&gt;存在下におけるセミクラスレートハイドレートの相平衡およびガス吸着・拡散特性に与える影響について検討するとともに,分離媒体としての有用性を評価した.

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  • 2-2-4 ガス分離プロセス構築に向けたセミクラスレートハイドレートのガス吸着および拡散特性(Session 2-2 ハイドレート 1)

    小松 博幸, 大田 昌樹, 渡邉 賢, Richard Lee Smith

    日本エネルギー学会大会講演要旨集   23   44 - 45   2014年

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    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 work, an effect of anion (Br^-, CI^- and F^-) of tetra-n-butyl ammonium (TBA) salts on the H_2 and CO_2 adsorption and diffusional characteristics of semi-clathrate hydrate was investigated with multiple adsorption resistance (MAR) model for the purpose of gas separation. The equilibrium H_2 occupancy in the S-cage depended on the semi-clathrate hydrate structure. The equilibrium CO_2 occupancy in S-cage depended not only on that but also on the TBA salt for TS-I strucure. The apparent diffusion coefficients for H_2 systems were larger than those for CO_2 systems. The H_2/CO_2 selectivities for 3.0 mol% TBAF semi-clathrate hydrate was the highest among TBA salt semi-clathrate hydrate.

    DOI: 10.20550/jietaikaiyoushi.23.0_44

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  • 2-2-2 セミクラスレートハイドレートの相平衡に与える添加物の影響(Session 2-2 ハイドレート 1)

    後藤 武蔵, 大田 昌樹, 渡邉 賢, Richard Lee Smith Jr., 小松 博幸

    日本エネルギー学会大会講演要旨集   23   40 - 41   2014年

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    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 work, the phase behavior of CO_2 + tetra-n-butyl ammonium fluoride(TBAF) semi-clathrate hydrates with added Na_2CO_3 or NaCl was measured and correlated with a modified van der Waals and Platteeuw model and Pizer model for the purpose of developing a CO_2-H_2 gas separation process. When Na_2CO_3 (0.66 mol/L) was added, the pressure-temperature solid-liquid-vapor (PT-SLV) equilibrium curve shifted to lower temperatures by around 4 K compared with that of CO_2-TBAF. When NaCl(0.24 mol/L) was added, the PT-SLV curve has not shifted little. The data could be correlated by the model to within 10.4% in pressure. The model allows the estimation of the stability of the semi-clathrate hydrates in presence of electrolytes.

    DOI: 10.20550/jietaikaiyoushi.23.0_40

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  • Measurement of pure hydrogen and pure carbon dioxide adsorption equilibria for THF clathrate hydrate and tetra-n-butyl ammonium bromide semi-clathrate hydrate 査読

    Hiroyuki Komatsu, Atsushi Hayasaka, Masaki Ota, Yoshiyuki Sato, Masaru Watanabe, Richard L. Smith

    Fluid Phase Equilibria   357   80 - 85   2013年11月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    In this work, gas adsorption equilibria for H2 and for CO2 with THF clathrate hydrate particles and with tetra-n-butyl ammonium bromide (TBAB) semi-clathrate hydrate particles (250-355μm) were measured. The structures of the TBAB semi-clathrate hydrates were confirmed with Raman spectroscopy and with differential scanning calorimetry. The THF clathrate hydrate particles had the largest adsorption (ca. 13.7mmol-H2/mol-host) at 269K among all of the hydrates studied. H2 adsorption at 269K for 2.6mol% TBAB semi-clathrate hydrate (type-B rich) was ca. 6.9mmol-H2/mol-host and that for 3.7mol% TBAB semi-clathrate hydrate (type-A rich) was ca. 3.4mmol-H2/mol-host. For CO2, THF clathrate hydrate had higher adsorption capacity (ca. 68.5 mmol-CO2/mol-host) than type-A (ca. 16.3 mmol-CO2/mol-host) or type-B (ca. 29.0 mmol-CO2/mol-host) semi-clathrate hydrate. Type-B TBAB semi-clathrate hydrate had a larger Langmuir constant ratio (CCO2/CH2) than that of THF hydrate. The selectivity of type-B TBAB semi-clathrate hydrate implied by the Langmuir constant ratio can be expected to be large, however the results need to be confirmed with gas mixtures and other conditions including effect of semi-clathrate hydrate particle size. © 2013 .

    DOI: 10.1016/j.fluid.2013.05.027

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  • Review of CO<sub>2</sub>-CH<sub>4</sub> clathrate hydrate replacement reaction laboratory studies – Properties and kinetics 査読

    Hiroyuki Komatsu, Masaki Ota, Richard, L. Smith Jr, Hiroshi Inomata

    JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS   44 ( 4 )   517 - 537   2013年7月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    Replacement reactions in clathrate hydrates, for which CO&lt;sub&gt;2&lt;/sub&gt; is used to replace methane gas trapped in inclusion compounds in the deep sea or permafrost areas, have gained growing attention as a possible method to sequester CO&lt;sub&gt;2&lt;/sub&gt; and recover natural gas. This review examines research progress in the replacement reactions and analytical methods with special focus on laboratory studies. Methane hydrate dissociation enthalpies, carbon dioxide hydrate dissociation enthalpies, methane hydrate thermal conductivities and thermal diffusivities are tabulated. Methods used to study the CH&lt;sub&gt;4&lt;/sub&gt;-CO&lt;sub&gt;2&lt;/sub&gt; replacement reaction include material balance (MB), MB with particle size analyzer, MB and Raman, NMR, and magnetic resonance imaging. New analytical methods such as thermo-Raman should be explored in the future to develop a localized picture of the microscopic replacement mechanism including water molecule movement. Combination of these data with molecular simulations will allow new macroscopic models to be developed for use with practical processes for unconventional natural gas.

    DOI: 10.1016/j.jtice.2013.03.010

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  • Phase Equilibrium Measurements of Hydrogen-Tetrahydrofuran and Hydrogen-Cyclopentane Binary Clathrate Hydrate Systems 査読

    Hiroyuki Komatsu, Hiroki Yoshioka, Masaki Ota, Yoshiyuki Sato, Masaru Watanabe, Richard L. Smith, Cor J. Peters

    JOURNAL OF CHEMICAL AND ENGINEERING DATA   55 ( 6 )   2214 - 2218   2010年6月

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER CHEMICAL SOC  

    Phase equilibrium data for H-2 + tetrahydrofuran (THF) and H-2 + cyclopentane (CP) binary clathrate hydrate systems were determined from temperature and pressure measurements with a newly designed semimicro (approximate to 0.78 cm(3)) cell. The range of conditions studied for the two systems was at pressures from (2 to 14) MPa and at temperatures from (278 to 285) K. Inclusion characteristics of the hydrogen molecules for both systems were similar according to their Raman spectra. The measured data for the H2 THF binary clathrate hydrate system were in agreement with some of the data in the literature. New phase equilibrium data and Raman spectroscopy analyses for the H-2 + CP binary clathrate hydrate system are reported. The dissociation enthalpies determined from data in the pressure range from (8 to 14) MPa were (212 and 220) kJ.mol(-1) for the H-2 + THF and H-2 + CP binary clathrate hydrate systems, respectively.

    DOI: 10.1021/je900767h

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  • 水素混合ハイドレートにおける水素の拡散挙動の解析

    小松 博幸, 大田 昌樹, 渡邉 賢, 佐藤 善之, Smith Jr. R. L.

    化学工学会 研究発表講演要旨集   2010   150 - 150   2010年

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    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.2010f.0.150.0

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MISC

  • Carbon Dioxide Separation Evaluated Based on Phase Equilibria of CO<sub>2</sub> + N<sub>2</sub> + tetra-<i>n</i>-butylammonium bromide semi-clathrate hydrates

    Hiroyuki Komatsu, Kenta Maruyama, Kazuaki Yamagiwa, Hideo Tajima

    Proceedings of 8th International Symposium on Molecular Thermodynamics and Molecular Simulation   2018年9月

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    記述言語:英語  

    The objective of this work was to investigate CO&lt;sub&gt;2&lt;/sub&gt; separation performance obtained with semi-clathrate hydrates using experimental data and a phase equilibrium model. In the experiments, phase equilibria were determined for CO&lt;sub&gt;2&lt;/sub&gt; + tetra-&lt;i&gt;n&lt;/i&gt;-butyl ammonium bromide (TBAB), N&lt;sub&gt;2&lt;/sub&gt; + TBAB and CO&lt;sub&gt;2&lt;/sub&gt; + N&lt;sub&gt;2&lt;/sub&gt; + TBAB semi-clathrate hydrates. The phase equilibrium model employed was the Gibbs energy type based on the van der Waals-Platteeuw model. The parameters in the Langmuir constants of the estimation model were determined from the &lt;i&gt;P&lt;/i&gt;-&lt;i&gt;T&lt;/i&gt; diagram of CO&lt;sub&gt;2&lt;/sub&gt; + TBAB and N&lt;sub&gt;2&lt;/sub&gt; + TBAB semi-clathrate hydrates. The model showed good correlation of the &lt;i&gt;P&lt;/i&gt;-&lt;i&gt;T&lt;/i&gt; diagram of CO&lt;sub&gt;2&lt;/sub&gt; + N&lt;sub&gt;2&lt;/sub&gt; + TBAB semi-clathrate hydrates. The model was able to provide reliable correlation of the &lt;i&gt;P&lt;/i&gt;-&lt;i&gt;x&lt;/i&gt; diagram. The separation factors obtained from experimental data were 5 – 10. In simulation results, CO&lt;sub&gt;2&lt;/sub&gt; composition was concentrated to more than 70% from 20% in a two stage gas separation process at 277K. The separation performance of semi-clathrate hydrates was ranked highest among th

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  • Decomposition of Methane Hydrates Analyzed with Raman Spectroscopy and a Mass Transfer model Considering Cage Occupancy

    Hiroyuki Komatsu, Takuya Sasagawa, Shinichiro Yamamoto, Yuya Hiraga, Masaki Ota, Takao Tsukada, Richard, L. Smith J

    Proceedings of 8th International Symposium on Molecular Thermodynamics and Molecular Simulation   2018年9月

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    記述言語:英語  

    The objective of this work was to investigate diffusion phenomena in methane hydrate (MH) during depressurization conditions that lead to decomposition. A mass transfer model is proposed that consideres cage occupancy and the diffusion of methane from both S-cages and M-cages.phenomena since cage occupancy should affect transport of methane from the MH. The dissociation kinetics of methane in the interface of MH are strongly related to the diffusion phenomenon. Methane occupancies in cages during decomposition were measured in situ with Raman spectroscopy with a newly-constructed optical system and data were estimated with Langmuir constants calculated by assuming a spherically symmetric cell potential and were found to give reliable estimations. The change of average occupancy with time in the experimental data was agreement with that of the simulation results. Thus, the decomposition kinetics of MH can be reliably simulated for hydrate phase dissociation-limited mechanisms. The developed model will be applied to larger-scale geological systems to estimate gas production rates.

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  • Heat transfer behavior and separation factor profiles during hydrate slurry decomposition for improving a hydrate-based gas separation

    Hideo Tajima, Hikaru Akagami, Hiroyuki Komatsu, Kazuaki Yamagiwa

    Proceedings of 9th International Conference on Gas Hydrate   2017年6月

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    記述言語:英語  

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  • Analysis of Transport Phenomena at Methane Hydrate Particle-Fluid Interface with a Multiple Dissociation Model

    Hiroyuki Komatsu, Yutaro Ono, Masaki Ota, Takao Tsukada, Richard, L. Smith Jr, Yuki Kanda, Junnosuke Okajima, Atsuki Komiya, Shigenao Maruyama

    Proceedings of the 9th International Conference on Gas Hydrates   2017年6月

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    記述言語:英語  

    A multiple dissociation model is proposed that considers transport phenomenon in the interface of MH at practical dissociation conditions. Two methane dissociative reaction are assumed as follows: (i) dissociation reaction of methane molecules without destroying the host cage of MH as a concentration driving force difference between MH and bulk phase, and (ii) decomposition reaction of the host cage of MH as a chemical potential driving force difference between hydrate and liquid phase. These reactions depend on dissociation conditions.

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  • Relationship between Gas Uptake Behavior and Solid fraction in Semi-Clathrate Hydrate Slurry under CO<sub>2</sub> Atmosphere

    Hiroyuki Komatsu, Shintaro Kan, Syunsuke Watanabe, Hideo Tajima, Kazuaki Yamagiwa

    Proceedings of the 9th International Conference on Gas Hydrates   2017年6月

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    記述言語:英語  

    A method for measuring the solid fraction of tetra-n-butyl ammonium bromide (TBAB) semi-clathrate hydrates slurries based on electrical conductivity was developed. The method was used to study CO&lt;sub&gt;2&lt;/sub&gt; absorption by TBAB hydrate slurries. The solid fraction of the hydrate slurries increased through CO&lt;sub&gt;2&lt;/sub&gt; absorption. The CO&lt;sub&gt;2&lt;/sub&gt; absorption in the hydrate slurries increased by 71% relative to that in the TBAB solution. This change in ratio was higher for a bubble column reactor than that for a stirred-tank batch reactor. Fluctuations at the interface of the hydrate slurries through flow mixing were found to be especially important for improving gas-hydrate contact.

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  • Aggregation and Flow Characteristics of Semi-Clathrate Hydrate Slurries with Dispersants

    Hiroyuki Komatsu, Tomohiro Abe, Takeshi Kobayashi, Hideo Tajima, Kazuaki Yamagiwa

    Proceedings of the 9th International Conference on Gas Hydrates   2017年6月

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    記述言語:英語  

    Rheological properties of tetra-n-butyl ammonium bromide (TBAB) semi-clathrate hydrate slurries with polyvinyl alcohol (PVA) were measured with a single-cylinder rotational viscometer for the purpose of evaluating the effect of polymer dispersants. Concentration and degree of polymerization (DP) of PVA dispersants on aggregation of hydrate slurries were investigated. Dispersibility and dispersion stability of hydrate slurries with 0.86 wt% PVA (DP of 2000) were the highest among the PVA concentrations examined. Long-chain length PVA readily causes cross-linking aggregation but improves hydrate slurry dispersion stability.

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  • Effect of additives on low-temperature separation property of fatty acid methyl ester mixture

    Masahiro Abe, Ryosuke Nakamura, Hiroyuki Komatsu, Kazuaki Yamagiwa, Hideo Tajima

    Proceedings of ASCON-IEEChE 2016   540 - 545   2016年11月

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    記述言語:英語  

    Additive winterization processes using sorbitan monopalmitate and sorbitan monostearate were compared with a conventional agitation winterization for the separation of saturated FAMEs from a mixture of saturated and unsaturated FAMEs. The additive winterization process led to greater improvements in the low-temperature flow properties of the FAME mixtures by a single stage. Furthermore, the agitation winterization required at least three cycles of sequential cooling, agitation and filtration to obtain similar results. This study therefore highlights the potential of additive winterization for improving the low-temperature flow properties of biodiesel fuels containing sorbitan mono fatty acid esters as a simple, energy-saving process.

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  • 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

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    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  

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  • Measurement of the adsorption equilibria of hydrogen and of carbon dioxide in clathrate and semi-clathrate hydrates

    Hiroyuki Komatsu, Atsushi Hayasaka, Masaki Ota, Yoshiyuki Sato, Masaru Watanabe, Richard Lee Smith Jr

    Proceedings of 6th International Symposium on Molecular Thermodynamics and Molecular Simulation   2012年9月

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    記述言語:英語  

    Characteristic structural changes that occur in hydrates and semi-clathrate hydrates are important for understanding hydrate properties for gas separation applications. In this work, gas adsorption equilibria for H&lt;sub&gt;2&lt;/sub&gt; and for CO&lt;sub&gt;2&lt;/sub&gt; with THF clathrate hydrate particles and with tetra-n-butyl ammonium bromide (TBAB) semi-clathrate hydrate particles were measured. The THF clathrate hydrate particles had the largest adsorption (ca. 15.0 mmol-H&lt;sub&gt;2&lt;/sub&gt;/mol-H&lt;sub&gt;2&lt;/sub&gt;O) among all of the hydrates studied. The TBAB semi-clathrate hydrates had two types of structures, type A and type B, as confirmed by differential scanning calorimetry. It was found that H&lt;sub&gt;2&lt;/sub&gt; adsorption for 2.6 mol% TBAB semi-clathrate hydrate (type B-rich) was larger than that for 3.7 mol% TBAB semi-clathrate hydrate (type A-rich) at the beginning of the isothermal isobaric conditions for H&lt;sub&gt;2&lt;/sub&gt; gas. The capture cavity structure for H&lt;sub&gt;2&lt;/sub&gt; or CO&lt;sub&gt;2&lt;/sub&gt; is demonstrated experimentally to be different between type A and type B TBAB semi-clathrate hydrates by material balance.

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  • 混合セミクラスレートハイドレート形成機構に与えるイオン液体アニオン種の影響

    小松博幸, 大田昌樹, 渡邉賢, 佐藤善之, 猪股宏, SMITH Richard Lee., Jr.

    高圧討論会講演要旨集   53rd   2012年

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  • CONSTITUENT MOLECULAR EFFECTS ON PHASE EQUILIBRIA AND HYDROGEN ADSORPTION KINETICS IN CLATHRATE HYDRATES

    Hiroyuki Komatsu, Masaki Ota, Masaru Watanabe, Yoshiyuki Sato, Richard, L. Smith J

    Proceedings of the 7th International Conference on Gas Hydrates   2011年7月

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    記述言語:英語  

    Formation rates are reported for H&lt;sub&gt;2&lt;/sub&gt;-THF, H&lt;sub&gt;2&lt;/sub&gt;-THF (D&lt;sub&gt;2&lt;/sub&gt;O), H&lt;sub&gt;2&lt;/sub&gt;-THF-d8, H&lt;sub&gt;2&lt;/sub&gt;-furan, H&lt;sub&gt;2&lt;/sub&gt;-CP and H&lt;sub&gt;2&lt;/sub&gt;-tetrahydrothiophene (THT) binary clathrate hydrates at 269 K, at 8.2 MPa. Formation rates of<br />
    H&lt;sub&gt;2&lt;/sub&gt;-furan binary clathrate hydrate was fastest among these binary clathrate hydrates. The lattice constant of hydrates were determined and used to analyze the data with a newly proposed two stage model. Hydrogen formation rate differences between the binary clathrate hydrates can be described by the model.

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  • Analysis of hydrogen-tetrahydrofuran and hydrogen-cyclopentane binary clathrate hydrate phase equilibria

    Hiroyuki Komatsu, Hiroki Yoshioka, Masaki Ota, Yoshiyuki Sato, Hiroshi Inomata, Richard, L. Smith J

    Proceedings of 5th International Symposium on Molecular Thermodynamics and Molecular Simulation   2009年10月

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    記述言語:英語  

    The phase equilibrium of the H&lt;sub&gt;2&lt;/sub&gt; + cyclopentane binary clathrate hydrate is important because cyclopentane (CP) has been shown to reduce the equilibrium storage pressures similar to that of tetrahydrofuran (THF). In this work, we apply correlations for the H&lt;sub&gt;2&lt;/sub&gt; + CP binary clathrate hydrate system based on the Gibbs free energy and the Kihara potential. The correlation is also applied to the H2 + THF binary clathrate hydrate system and compared with literature results. It was found that the models could correlate both H&lt;sub&gt;2&lt;/sub&gt; + CP and H&lt;sub&gt;2&lt;/sub&gt; + THF sufficiently. From the calculated hydrogen occupancies and the Langmuir constants of CP and THF, the relationship between hydrate dissociation enthalpy and hydrogen occupancy was studied. The hydrate dissociation enthalpy varied according to phase equilibrium conditions at low pressure. The Langmuir constant of CP was lower than that of THF which implies that the formation of CP clathrate hydrate is more difficult to form than THF clathrate hydrate. As hydrogen occupancies became higher, the hydrate dissociation enthalpies of H&lt;sub&gt;2&lt;/sub&gt; + hydrocarbon binary clathrate hydrate approached a constant value.

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講演・口頭発表等

  • 2-3-4 ハイドレート化ガス分離装置連続操作のための見かけ上の総括伝熱係数の検討

    江連 涼友, 小松 博幸, 山際 和明, 多島 秀男

    日本エネルギー学会大会講演要旨集  2018年 

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    記述言語:日本語  

    <p>Hydrate-based gas separation is often investigated with using batch or semi-batch operations. In order to increase the throughput of gas mixture without increasing the apparatus volume, it is necessary to perform a continuous operation of hydrate-based gas separation. In this study, we combined a hydrate-decomposition with a hydrate-formation apparatus or continuous operation. By trial and error approach, an apparent overall heat transfer coefficient of the combined system with using water as a fluid was estimated in the presence of bubbles and under pressure. In addition, the apparent heat transfer coefficient involving hydrate formation was also estimated under SDS solution condition.</p>

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  • 2-4-4 TBABセミクラスレートハイドレートスラリーにおける凝集に及ぼす影響因子の検討

    坂本 宜之, 阿部 智大, 山際 和明, 多島 秀男, 小松 博幸

    日本エネルギー学会大会講演要旨集  2018年 

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    記述言語:日本語  

    <p>The viscosities of TBAB SCH slurry were measured using rotational viscometer to investigate agglomeration. These results were analysed with Herschel-Bulkley's model. The diameter of primary particle and behavior index decreased with decreasing temperature. This indicates that the agglomeration of primary particles is promoted at lower temperature.</p>

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  • 2-5-4 ケージ占有率を考慮した物質移動モデルによるメタンハイドレート解離現象の解析

    小松 博幸, 小野 優太郎, 大田 昌樹, Smith Richard Lee

    日本エネルギー学会大会講演要旨集  2018年 

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    記述言語:日本語  

    <p>In this work, the objective was to investigate the decomposition phenomena in methane hydrate (MH) under depressurization condition. A two stages decomposition model is proposed that considers the diffusion phenomena and the cage occupancy, which was applied to analyze the mass transport at the interface of methane hydrate (MH). A heat balance during a decomposition of MH was analyzed with a lumped capacitance model. The temperature of MH was decreased to freezing point during a decomposition of MH even at 2 MPa. Namely, the heat transfer in two stages decomposition model is very important to evaluate the methane gas production rate from MH.</p>

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  • 2-3-3 セミクラスレートハイドレートスラリーにおけるガス吸収挙動

    大越 英紀, 渡邉 隼輔, 多島 秀男, 山際 和明, 小松 博幸

    日本エネルギー学会大会講演要旨集  2018年 

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    記述言語:日本語  

    <p>In this study, gas absorption behavior of TBAB semi-clathrate hydrate slurry was investigated in bubble column reactor. The absorption rate of CO<sub>2</sub> into hydrate slurry increased rapidly as soon as the slurry and gas contacted. It was found that CO<sub>2</sub> absorption behavior does not change even with CO<sub>2</sub>/N<sub>2</sub> mixed gas. The separation efficiency did not depend on the flow rate in the bubble tower column reactor because the contact time was equivalent.</p>

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  • 2-5-2 ラマン分光法を用いたメタンハイドレートの占有挙動の解析

    山本 慎一郎, 笹川 拓也, 平賀 佑也, 大田 昌樹, 塚田 隆夫, Smith Richard L, 小松 博幸

    日本エネルギー学会大会講演要旨集  2018年 

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    記述言語:日本語  

    <p>Maruyama et al. have proposed an innovative low CO<sub>2</sub> emission power generation system based on recovery of methane hydrates <sup>1)</sup>. During the hydrate dissociation process, occupancy (<i>θ</i>) in each cage (<i>θ</i><sub>M</sub> or <i>θ</i><sub>S</sub>) changes based on degree of progress for dissociation of methane hydrates. For analyzing relative cage occupancies (<i>θ</i><sub>M</sub>/<i>θ</i><sub>S</sub>), Raman spectroscopy is being used as an <i>in-situ</i> technique to determine methane hydrate dissociation characteristics. In this work, the changes in the relative cage occupancy ratio (3<i>θ</i><sub>M</sub>/<i>θ</i><sub>S</sub>) in the methane hydrates were monitored experimentally at an equilibrium conditions. Model calculations agreed well with the experimental data. The cage occupancy ratio in the methane hydrates decreased as increasing pressure due to increase in the amount of methane stored in the S-cage. Measuring the 3<i>θ</i><sub>M</sub>/<i>θ</i><sub>S</sub> values under the dissociation process can be important knowledge to develop a kinetic model considering mass transfer of methane from the solid structures.</p>

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  • 2-2-3 メタンハイドレートに関する複合解離反応モデルの構築

    小野 優太朗, 大田 昌樹, 渡邉 賢, 塚田 隆夫, Smith Richard Lee Jr, 小松 博幸

    日本エネルギー学会大会講演要旨集  2016年 

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    記述言語:日本語  

    <p>In this work, a model that can be used in large-scale simulations was developed for studying the dissociation of methane hydrate. In the model, two mechanisms were assumed: (i) dissociation of methane hydrate as as a concentration driving force difference and (ii) decomposition of hydrate host cage of the methane hydrate according to a chemical potential driving force ignoring heat effects of the endothermic reaction. Experimental data of decomposition rates at 278 K, 4.39 MPa were correlated by the model assuming that (i) and (ii) occur in parallel using an effective rate constant of decomposition K as a fitting parameter. As a result, the rate constant of decomposition <i>K</i> was estimated to be 1.73 × 10<sup>-9</sup> at 278 K.</p>

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  • 2-4-4 セミクラスレートハイドレートスラリーの流動特性およびCO<sub>2</sub> 収着量に与える分散剤の影響

    小松 博幸, 小林 健志, 渡邉 隼輔

    日本エネルギー学会大会講演要旨集  2016年 

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    記述言語:日本語  

    <p>In this work, CO<sub>2</sub> sorption by tetra-n-butyl ammonium bromide (TBAB) semi-clathrate hydrate (SCH) slurries in the absence and in the presence of polyvinyl alcohol (PVA) and sodium dodecyl sulfate (SDS) dispersants was investigated. CO<sub>2</sub> sorption was measured with a newly-developed bubble column reactor. CO<sub>2</sub> sorption amount for SCH slurry was about 3.2 mmol-CO<sub>2</sub>/mol-water at 0.8 MPa (He/CO<sub>2</sub> = 4) in the absence of dispersants. Rheological behavior of the SCH slurries was studied. SDS caused a reduction in the SCH slurry viscosity, whereas PVA caused an increase in slurry viscosity. The SCH slurries with the dispersants were determined to be Bingham plastic.</p>

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  • 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年 

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    記述言語:日本語  

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  • 2-2-4 ガス分離プロセス構築に向けたセミクラスレートハイドレートのガス吸着および拡散特性(Session 2-2 ハイドレート 1)

    小松 博幸, 大田 昌樹, 渡邉 賢, Richard Lee Smith

    日本エネルギー学会大会講演要旨集  2014年 

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    記述言語:日本語  

    In this work, an effect of anion (Br^-, CI^- and F^-) of tetra-n-butyl ammonium (TBA) salts on the H_2 and CO_2 adsorption and diffusional characteristics of semi-clathrate hydrate was investigated with multiple adsorption resistance (MAR) model for the purpose of gas separation. The equilibrium H_2 occupancy in the S-cage depended on the semi-clathrate hydrate structure. The equilibrium CO_2 occupancy in S-cage depended not only on that but also on the TBA salt for TS-I strucure. The apparent diffusion coefficients for H_2 systems were larger than those for CO_2 systems. The H_2/CO_2 selectivities for 3.0 mol% TBAF semi-clathrate hydrate was the highest among TBA salt semi-clathrate hydrate.

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  • 2-2-2 セミクラスレートハイドレートの相平衡に与える添加物の影響(Session 2-2 ハイドレート 1)

    後藤 武蔵, 大田 昌樹, 渡邉 賢, Richard Lee, Smith Jr, 小松 博幸

    日本エネルギー学会大会講演要旨集  2014年 

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    記述言語:日本語  

    In this work, the phase behavior of CO_2 + tetra-n-butyl ammonium fluoride(TBAF) semi-clathrate hydrates with added Na_2CO_3 or NaCl was measured and correlated with a modified van der Waals and Platteeuw model and Pizer model for the purpose of developing a CO_2-H_2 gas separation process. When Na_2CO_3 (0.66 mol/L) was added, the pressure-temperature solid-liquid-vapor (PT-SLV) equilibrium curve shifted to lower temperatures by around 4 K compared with that of CO_2-TBAF. When NaCl(0.24 mol/L) was added, the PT-SLV curve has not shifted little. The data could be correlated by the model to within 10.4% in pressure. The model allows the estimation of the stability of the semi-clathrate hydrates in presence of electrolytes.

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  • 水素混合ハイドレートにおける水素の拡散挙動の解析

    小松 博幸, 大田 昌樹, 渡邉 賢, 佐藤 善之, Smith Jr. R. L

    化学工学会 研究発表講演要旨集  2010年 

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    記述言語:日本語  

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受賞

  • 奨励賞(第27回年次大会発表)

    2018年8月   日本エネルギー学会   ケージ占有率を考慮した物質移動モデルによるメタンハイドレート解離現象の解析

    小松 博幸

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  • 2010 Symposium on Methane Hydrate Recovery and CO<sub>2</sub> Sequestration Best Student Paper Award

    2010年3月   Institute of Applied Mechanics, National Taiwan University   Phase equilibrium measurements and fundamental models for clathrate hydrates

    Hiroyuki Komatsu, Masaki Ota, Richard Lee Smith Jr

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    受賞区分:国際学会・会議・シンポジウム等の賞  受賞国:台湾

    We have studied the phase equilibia of hydrogen-tetrahydrofuran and hydrogen -cyclopentne binary clathrate hydrates. In this presentation, a phase equilibrium measurement technique was developed and the phase equilibria of hydrogen-tetrahydrofuran (at temperature ranging from 278.3 to 282.0 K) and hydrogen-cyclopentane (at temperature ranging from 280.7 to 284.3 K) binary clathrate hydrates were measured at pressures ranging from 2 to 14 MPa. Two models are compared for these systems and conclusions are drawn on their applicability.

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共同研究・競争的資金等の研究

  • セミクラスレートハイドレートスラリーの固形分率制御による高効率ガス分離システムの開発

    2018年9月 - 2019年3月

    民間財団等  試験研究費 

    小松博幸

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    担当区分:研究代表者  資金種別:競争的資金

    配分額:650000円 ( 直接経費:650000円 )

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  • 地産地消型バイオガス利用に向けたハイドレートスラリー流動型ガス分離プロセスの構築

    2016年4月 - 2018年3月

    日本学術振興会  科学研究費助成事業  若手研究(B)

    小松博幸

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    担当区分:研究代表者  資金種別:競争的資金

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  • CO<sub>2</sub>存在下におけるセミクラスレートハイドレートスラリーの流動性変化に関するメカニズム解明

    2015年9月 - 2016年3月

    民間財団等  試験研究費 

    小松博幸

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    担当区分:研究代表者  資金種別:競争的資金

    配分額:320000円 ( 直接経費:320000円 )

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  • 向流接触型ガス分離プロセス開発に向けたセミクラスレートハイドレートスラリーの流動特性

    2014年9月 - 2015年3月

    民間財団等  試験研究費 

    小松博幸

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    担当区分:研究代表者  資金種別:競争的資金

    配分額:400000円 ( 直接経費:400000円 )

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  • セミクラスレートハイドレートスラリーを用いた向流接触型のガス分離法に関する基礎研究

    2014年9月 - 2015年3月

    民間財団等  試験研究費 

    小松博幸

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    担当区分:研究代表者  資金種別:競争的資金

    配分額:500000円 ( 直接経費:500000円 )

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  • ハイドレート利用の高含有率・高速貯蔵可能な水素貯蔵マテリアルの開発

    2011年4月 - 2014年3月

    日本学術振興会  科学研究費助成事業  特別研究員奨励費

    小松博幸

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    担当区分:研究代表者  資金種別:競争的資金

    配分額:4160000円 ( 直接経費:3200000円 、 間接経費:960000円 )

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担当経験のある授業科目(researchmap)

  • 化学工学計算演習

    機関名:新潟大学

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  • 化学工学実験

    機関名:新潟大学

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  • 化学工学実験

    機関名:新潟大学

     詳細を見る

  • 化学工学計算演習

    機関名:新潟大学

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  • 設計製図

    機関名:新潟大学

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  • 化学実験

    機関名:新潟大学

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  • 化学工学実験

    機関名:新潟大学

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  • 化学実験

    機関名:新潟大学

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  • 設計製図

    機関名:新潟大学

     詳細を見る

  • 化学工学実験

    機関名:新潟大学

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  • 工学リテラシー入門(化学材料分野)

    機関名:新潟大学

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担当経験のある授業科目

  • リメディアル演習

    2022年
    -
    現在
    機関名:新潟大学

  • 異文化と技術

    2021年
    -
    現在
    機関名:新潟大学

  • 技術文献リサーチA

    2020年
    -
    現在
    機関名:新潟大学

  • 技術文献リサーチC

    2020年
    -
    現在
    機関名:新潟大学

  • 技術文献リサーチB

    2020年
    -
    現在
    機関名:新潟大学

  • 卒業研究

    2020年
    -
    現在
    機関名:新潟大学

  • 技術文献リサーチD

    2020年
    -
    現在
    機関名:新潟大学

  • 化学実験2

    2019年
    -
    現在
    機関名:新潟大学

  • 卒業研修

    2019年
    -
    現在
    機関名:新潟大学

  • リメディアル演習

    2019年
    機関名:新潟大学

  • 化学実験1

    2018年
    -
    現在
    機関名:新潟大学

  • 工学リテラシー入門(化学材料分野)

    2017年
    -
    現在
    機関名:新潟大学

  • 化学工学実験

    2015年
    -
    現在
    機関名:新潟大学

  • 化学工学計算演習

    2015年
    -
    現在
    機関名:新潟大学

  • 化学実験

    2015年
    -
    2017年
    機関名:新潟大学

  • 設計製図

    2015年
    -
    2016年
    機関名:新潟大学

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