Effective Hydrogen Generation from H2S by Utilizing the Sulfur Cycle (1)-Recovery of Poly Sulfide Ion from Basic Solution Produced by Carbon Cluster-

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Other Title
  • イオウを利用する素材プロセッシング（ＩＩ）硫黄循環による硫化水素からの水素エネルギー製造（１）―炭素クラスターによる塩基性水溶液からのポリ硫化物イオン回収―
  • 硫黄循環による硫化水素からの水素エネルギー製造(1)炭素クラスターによる塩基性水溶液からのポリ硫化物イオン回収
  • イオウ ジュンカン ニ ヨル リュウカ スイソ カラ ノ スイソ エネルギー セイゾウ 1 タンソ クラスター ニ ヨル エンキセイ スイヨウエキ カラ ノ ポリ リュウカブツ イオン カイシュウ
  • Recovery of Poly Sulfide Ion from Basic Solution Produced by Carbon Cluster
  • 炭素クラスターによる塩基性水溶液からのポリ硫化物イオン回収

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Description

Hydrogen gas can be effectively synthesized from the electrochemical and/or photochemical decomposition process of H2S because of its low electrochemical potential. However, decomposition rate was gradually decreased with increasing the amount of poly sulfide ion, such as S22-, which simultaneously synthesized as the by-product during the reaction. Thus, poly sulfide ion should be removed from the solution, nevertheless it could not be removed from the solution by without loss of basic solution and/or dissipation of metal ion.<BR>In this study, the idea based on the interaction between fullerenes and sulfur was introduced into the development of collection method for poly sulfide ions from basic solution. Fullerenes was dissolved into toluene, and mixed with aqueous solution contained S22- ion. After 6 hours agitation, the color of the aqueous phase was changed from yellow to transparent in the case of fullerene/toluene solution treatment. Additionally, during every treatment, elemental sulfur was produced in the aqueous phase, and fullerene-sulfur compounds, such as C60S16 and C70S16, were formed in the toluene phase after 4th treatment. Thus, extracting and separating of poly sulfide ion from aqueous solution was succeeded.

Journal

  • Journal of MMIJ

    Journal of MMIJ 126 (7), 460-463, 2010

    The Mining and Materials Processing Institute of Japan

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