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Life Cycle Assessment-Directed Optimization of Hydrogen Sulfide Removal During Biomass-Derived Hydrogen Production

  • Shohei Kuroda
  • Tomoyuki Ishiyama
  • Shota Kondo
  • Mitsuo Kameyama
  • Yuna Seo
  • Kiyoshi Dowaki
Chapter

Abstract

Biomass-derived hydrogen (Bio-H2), which is produced through a gasification process, can be used as the fuel in fuel cells. However, impurities such as H2S and HCl produced as by-products during the gasification process can reduce the voltage output and shorten the lifespan of Bio-H2-based fuel cells. Therefore, efficient means of removing H2S produced during the production of Bio-H2 are needed. Generally, the removal of unwanted by-products requires large amounts of metal oxide as an adsorbent, which has a large environmental impact. Here, we examined how to reduce the amount of adsorbent needed for the removal of H2S during the production of Bio-H2. A life cycle assessment approach was then used to assess the environmental impact of removing H2S. For the production of Bio-H2 at low temperatures, adsorption of H2S with Fe2O3 and ZnO was found to be promising. We also found that the Bio-H2 could be further purified by replacing the conventional pressure swing adsorption process with a two-step process. In our novel Bio-H2 production process, the H2S removal performance of the entire process was comparable with that of a conventional process. Moreover, our novel process had 91% less impact on the life cycle assessment index abiotic depletion.

Keywords

H2S removal Fe2O3 ZnO HAS-Clay Zeolite A-5 Bio-H2 PSA LCA 

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Copyright information

© Springer Nature Singapore Pte Ltd. 2019

Authors and Affiliations

  • Shohei Kuroda
    • 1
  • Tomoyuki Ishiyama
    • 1
  • Shota Kondo
    • 1
  • Mitsuo Kameyama
    • 2
  • Yuna Seo
    • 1
  • Kiyoshi Dowaki
    • 1
  1. 1.Department of Industrial Administration, Graduate School of Science and TechnologyTokyo University of ScienceTokyoJapan
  2. 2.Japan Blue Energy Co., Ltd.TokyoJapan

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