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

Research output: Chapter in Book/Report/Conference proceedingConference 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 languageEnglish
Title of host publicationGeothermal Resources Council Annual Meeting 2011, Geothermal 2011
Pages143-146
Number of pages4
Volume35 1
Publication statusPublished - 2011 Dec 1
EventGeothermal Resources Council Annual Meeting 2011, Geothermal 2011 - San Diego, CA, United States
Duration: 2011 Oct 232011 Oct 26

Other

OtherGeothermal Resources Council Annual Meeting 2011, Geothermal 2011
CountryUnited States
CitySan Diego, CA
Period11/10/2311/10/26

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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  • Cite this

    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)