Advanced direct use of geothermal energy for hydrogen production and material conversion

Noriyoshi Tsuchiya; Noriaki Watanabe

Advanced direct use of geothermal energy for hydrogen production and material conversion

ENV - Environmental Studies for Advanced Society

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

Production of hydrogen by using geothermal energy was investigated. Georeactor is one of advanced direct use for chemical reactions to produce hydrogen and material conversion. Hydrogen sulfide (H ₂S, HS ^- and S ^2-) has great potential to produce hydrogen under hydrothermal condition, however, oxidized sulfur species such as SO ₄ ^2- and S ₂O ₃ ^2- were produced as by-product of generation of hydrogen. Some of organic compounds and urea had possibilities to reduce oxidized sulfur species into reduced sulfur species to reproduce hydrogen. We carried out hydrothermal experiments involving two reaction steps which were production of hydrogen and reduction of sulfur oxidized species. We can obtain over 40% conversion rate to produce hydrogen under hydrothermal condition by using the lab-scale georeactor.

Original language	English
Title of host publication	Geothermal Resources Council Annual Meeting 2011, Geothermal 2011
Pages	143-146
Number of pages	4
Volume	35 1
Publication status	Published - 2011 Dec 1
Event	Geothermal Resources Council Annual Meeting 2011, Geothermal 2011 - San Diego, CA, United States Duration: 2011 Oct 23 → 2011 Oct 26

Other

Other	Geothermal Resources Council Annual Meeting 2011, Geothermal 2011
Country	United States
City	San Diego, CA
Period	11/10/23 → 11/10/26

Keywords

Direct use
Geothermal
Hydrogen
Hydrothermal reaction
Material conversion

ASJC Scopus subject areas

Renewable Energy, Sustainability and the Environment
Energy Engineering and Power Technology
Geophysics

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Tsuchiya, N., & Watanabe, N. (2011). Advanced direct use of geothermal energy for hydrogen production and material conversion. In Geothermal Resources Council Annual Meeting 2011, Geothermal 2011 (Vol. 35 1, pp. 143-146)

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title = "Advanced direct use of geothermal energy for hydrogen production and material conversion",

abstract = "Production of hydrogen by using geothermal energy was investigated. Georeactor is one of advanced direct use for chemical reactions to produce hydrogen and material conversion. Hydrogen sulfide (H 2S, HS - and S 2-) has great potential to produce hydrogen under hydrothermal condition, however, oxidized sulfur species such as SO 4 2- and S 2O 3 2- were produced as by-product of generation of hydrogen. Some of organic compounds and urea had possibilities to reduce oxidized sulfur species into reduced sulfur species to reproduce hydrogen. We carried out hydrothermal experiments involving two reaction steps which were production of hydrogen and reduction of sulfur oxidized species. We can obtain over 40% conversion rate to produce hydrogen under hydrothermal condition by using the lab-scale georeactor.",

keywords = "Direct use, Geothermal, Hydrogen, Hydrothermal reaction, Material conversion",

author = "Noriyoshi Tsuchiya and Noriaki Watanabe",

year = "2011",

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language = "English",

isbn = "9781618394828",

volume = "35 1",

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T1 - Advanced direct use of geothermal energy for hydrogen production and material conversion

AU - Tsuchiya, Noriyoshi

AU - Watanabe, Noriaki

PY - 2011/12/1

Y1 - 2011/12/1

N2 - Production of hydrogen by using geothermal energy was investigated. Georeactor is one of advanced direct use for chemical reactions to produce hydrogen and material conversion. Hydrogen sulfide (H 2S, HS - and S 2-) has great potential to produce hydrogen under hydrothermal condition, however, oxidized sulfur species such as SO 4 2- and S 2O 3 2- were produced as by-product of generation of hydrogen. Some of organic compounds and urea had possibilities to reduce oxidized sulfur species into reduced sulfur species to reproduce hydrogen. We carried out hydrothermal experiments involving two reaction steps which were production of hydrogen and reduction of sulfur oxidized species. We can obtain over 40% conversion rate to produce hydrogen under hydrothermal condition by using the lab-scale georeactor.

AB - Production of hydrogen by using geothermal energy was investigated. Georeactor is one of advanced direct use for chemical reactions to produce hydrogen and material conversion. Hydrogen sulfide (H 2S, HS - and S 2-) has great potential to produce hydrogen under hydrothermal condition, however, oxidized sulfur species such as SO 4 2- and S 2O 3 2- were produced as by-product of generation of hydrogen. Some of organic compounds and urea had possibilities to reduce oxidized sulfur species into reduced sulfur species to reproduce hydrogen. We carried out hydrothermal experiments involving two reaction steps which were production of hydrogen and reduction of sulfur oxidized species. We can obtain over 40% conversion rate to produce hydrogen under hydrothermal condition by using the lab-scale georeactor.

KW - Direct use

KW - Geothermal

KW - Hydrogen

KW - Hydrothermal reaction

KW - Material conversion

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M3 - Conference contribution

AN - SCOPUS:84860857020

SN - 9781618394828

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BT - Geothermal Resources Council Annual Meeting 2011, Geothermal 2011

T2 - Geothermal Resources Council Annual Meeting 2011, Geothermal 2011

Y2 - 23 October 2011 through 26 October 2011

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