Faculty Profiles - GOKON Nobuyuki

Papers - GOKON Nobuyuki

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Ferrite/zirconia-coated foam device prepared by spin coating for solar demonstration of thermochemical water-splitting Reviewed

Nobuyuki Gokon, Tatsuya Kodama, Nobuki Imaizumi, Jun Umeda, Taebeom Seo

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 36 ( 3 ) 2014 - 2028 2011.2

Kinetics of methane reforming over Ru/gamma-Al2O3-catalyzed metallic foam at 650-900 degrees C for solar receiver-absorbers Reviewed

Nobuyuki Gokon, Yuhei Yamawaki, Daisuke Nakazawa, Tatsuya Kodama

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 36 ( 1 ) 203 - 215 2011.1

Water-Splitting Foam Device Reactor for Solar Thermochemical Hydrogen Production Reviewed

Naoki Sato, Nobuki Imaizumi, Masanori Sugisaki, Tsuyoshi Hatamachi, Seo Taebeom, Nobuyuki Gokon, Tatsuya Kodama

International Symposium on Fusion Tech 2011 at Dalian, Dalian, China, December 15-17, 2011. 2011

HIGH-TEMPERATURE SOLAR THERMOCHEMICAL HYDROGEN PRODUCTION Reviewed

Tatsuya Kodama, Tetsuro Mataga, Kei Oomori, Tsuyoshi Hatamachi, Nobuyuki Gokon

International Symposium on Fusion Tech 2011 at Dalian, Dalian, China, December 15-17, 2011. 2011

3kWth Internally circulating fluidized bed reactor for solar gasification of coal cokes Reviewed

Nobuyuki Gokon, Ryuta Ono, Tsuyoshi Hatamachi, Li Liuyun, Hee Joon Kim, Atsushi Sakurai, Koji Matsubara, Tatsuya Kodama

SolarPACES 2011, Granada, Spain, 20-23 September, 2011. 2011

Continuous hydrogen production by an internally-curcurating fluidized particle bed reactor for thermochemical water splitting Reviewed

Tatsuya Kodama, Tetsuro Mataga, Nobuki Imaizumi, Tsuyoshi Hatamachi, Nobuyuki Gokon

SolarPACES 2011, Granada, Spain, 20-23 September, 2011. 2011

Activity test of a ferrite foam device reactor for solar thermochemical two-step water-splitting Reviewed

Nobuki Imaizumi, Naoki Sato, Tsuyoshi Hatamachi, Taebeom Seo, Nobuyuki Gokon, Tatsuya Kodama

SolarPACES 2011, Granada, Spain, 20-23 September, 2011. 2011

FUNDAMENTAL STUDY OF RADIATIVE TRANSFER ANALYSIS OF INTERNALLY CIRCULATING FLUIDIZED BED SOLAR REACTOR Reviewed

Atsushi Sakurai, So Sakuma, Nobuyuki Gokon, Koji Matsubara, Tatsuya Kodama

SolarPACES 2011, Granada, Spain, 20-23 September, 2011. 2011

Solar Thermochemical Two Step Water-Splitting by Beam Down Solar Concentrating System Reviewed

Kei Omori, Tetsuro Mataga, Megumi Saito, Tsuyoshi Hatamachi, Nobuyuki Gokon, Tatsuya Kodama

International Symposium on Fusion Tech 2011 at Dalian, Dalian, China, December 15-17, 2011. 2011

4-2-2 Two-Step Thermochemical Water-Splitting cycle using cerium oxide

AOYAGI Daiki, KAKENO Ayaka, IMAIZUMI Nobuki, HATAMACHI Tsuyoshi, GOKON Nobuyuki, KODAMA Tatsuya

Proceedings of the Annual Conference of The Japan Institute of Energy 20 216 - 217 2011

Language：Japanese Publisher：The Japan Institute of Energy

Cerium oxide was examined as a redox material on cyclic reactivity for converting high-temperature heat into chemical fuels via solar two-step thermochemical water-splitting. The thermal reduction of the cerium particles was conducted at 1300-1550℃, and the subsequent water-decomposition step was performed at 1000℃. The oxygen and hydrogen productivity were measured at each step, and the stoichiometry was evaluated.

DOI： 10.20550/jietaikaiyoushi.20.0_216

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4-2-3 Single-step systemization of thermochemical two-step water splitting cycle using an internally-circulating fluidized bed reactor

MATAGA Tetsuro, ITO Hiroto, HOSHINO Manami, IMAIZUMI Nobuki, HATAMACHI Tsuyoshi, GOKON Nobuyuki, KODAMA Tatsuya

Proceedings of the Annual Conference of The Japan Institute of Energy 20 218 - 219 2011

Language：Japanese Publisher：The Japan Institute of Energy

A windowed solar chemical reactor with an internally-circulating fluidized bed of metal oxides particles has been developed for realizing hydrogen production from water via the thermochemical two-step water-splitting cycle. In this research, the authors tried to systemize the two-step water-splitting processes into single-step in an internally-circulating fluidized bed reactor. The single-step systemized reactor using the internally-circulating fluidized bed of reacting particles was tested by solar-simulated Xe light irradiation and evaluated on hydrogen productivity.

DOI： 10.20550/jietaikaiyoushi.20.0_218

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4-2-1 Rietveld analysis of reactive ceramics for two-step thermochemical water-splitting

KONDO Ken, TANAKA Yoshiki, SATO Yusuke, HATAMACHI Tsuyoshi, GOKON Nobuyuki, KODAMA Tatsuya

Proceedings of the Annual Conference of The Japan Institute of Energy 20 214 - 215 2011

Language：Japanese Publisher：The Japan Institute of Energy

Reactive ceramics of m-ZrO_2-supported NiFe_2O_4 and unsupported NiFe_2O_4 were analyzed by Rietveld method for enhancing hydrogen productivity for solar thermochemical two-step water-splitting. In this paper, the reduced phase (wustite phase) and the remaining ferrite phase obtained after that their reactive ceramics were thermally reduced at 1300-1400℃ was examined, and the composition and the existence ratio of them were determined. The relation between the reduction temperature and the reaction activity was discussed.

DOI： 10.20550/jietaikaiyoushi.20.0_214

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2D axisymmetrical radiative transfer simulation of dispersed particles by spherical harmonics method

Sakurai Atsushi, Sakuma So, Matsubara Koji, Gokon Nobuyuki, Kodama Tatsuya

Proceedings of National Heat Transfer Symposium 2011 343 - 343 2011

Coal Coke Gasification in a Windowed Solar Chemical Reactor for Beam-Down Optics Reviewed

Tatsuya Kodama, Nobuyuki Gokon, Shu-ich Enomoto, Shouta Itoh, Tsuyoshi Hatamachi

JOURNAL OF SOLAR ENERGY ENGINEERING-TRANSACTIONS OF THE ASME 132 ( 4 ) 041004-6 - 041004-6 2010.11

Comparative study of the activity of nickel ferrites for solar hydrogen production by two-step thermochemical cycles Reviewed

Fernando Fresno, Tomoaki Yoshida, Nobuyuki Gokon, Rocio Fernandez-Saavedra, Tatsuya Kodama

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 35 ( 16 ) 8503 - 8510 2010.8

Ni/MgO-Al2O3 and Ni-Mg-O catalyzed SiC foam absorbers for high temperature solar reforming of methane Reviewed

Nobuyuki Gokon, Yuhei Yamawaki, Daisuke Nakazawa, Tatsuya Kodama

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 35 ( 14 ) 7441 - 7453 2010.7

Internally Circulating Fluidized Bed Reactor Using m-ZrO2 Supported NiFe2O4 Particles for Thermochemical Two-Step Water Splitting Reviewed

Nobuyuki Gokon, Hiroki Yamamoto, Nobuyuki Kondo, Tatsuya Kodama

JOURNAL OF SOLAR ENERGY ENGINEERING-TRANSACTIONS OF THE ASME 132 ( 2 ) 021102-1 - 021102-10 2010.5

Two-Step Thermochemical Cycles for High-Temperature Solar Hydrogen Production Reviewed

Tatsuya Kodama, Nobuyuki Gokon

Advances in Science and Technology 72 119 - 128 2010

5kWth-solar demonstration of a ferrite foam device reactor for thermochemical two-step water-splitting Reviewed

Tatsuya Kodama, Taebeom Seo, Nobuyuki Gokon, Ju Han Lee, Sang Joon Oh, Koichi Sakai, Nobuki Imaizumi

SolarPACES2010, Perpinan, France, September 21-25 2010. 2010

MOLTEN-SALT TUBULAR ABSORBER/REFORMER (MoSTAR) PROJECT: REFORMING PERFORMANCE OF REACTOR TUBES DURING INTERMITTENT HEATING Reviewed

Nobuyuki Gokon, Tatsuya Kodama, Shingo Yamashita, Tsuyoshi Hatamachi, Taebeom Seo

ES2010: PROCEEDINGS OF ASME 4TH INTERNATIONAL CONFERENCE ON ENERGY SUSTAINABILITY, VOL 2 105 - 113 2010

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Papers - GOKON Nobuyuki