Hydrogen recovery from hydrogen sulfide by oxidation and by decomposition

Barry L. Yang, Harold H Kung

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Selective oxidation of hydrogen sulfide to hydrogen and sulfur oxides in a two-step process and the catalytic decomposition of hydrogen sulfide were studied for the recovery of hydrogen from hydrogen sulfide. Platinum, when adequately dispersed on a silica support, was found to be effective in reacting with hydrogen sulfide to produce hydrogen and platinum sulfide at 500°C. The platinum sulfide could then be treated with oxygen at 400°C to release sulfur oxides and regenerate the platinum. However, oxidation of sulfur dioxide to trioxide, retention of oxygen by platinum, and adsorption of hydrogen sulfide by the silica support also occurred, which resulted in a minor loss in hydrogen yield. In the decomposition of hydrogen sulfide, platinum sulfide was found to be catalytically active. The equilibrium hydrogen yields were measured experimentally over the range 350-650°C and compared with the values calculated on the basis of a model that included the Sn allotropes, the H2Sn sulfanes, and HS. The values agreed well at low temperatures but deviated from each other up to 20% at high temperatures.

Original languageEnglish
Pages (from-to)1090-1097
Number of pages8
JournalIndustrial and Engineering Chemistry Research
Volume33
Issue number5
Publication statusPublished - 1994

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Hydrogen Sulfide
Hydrogen sulfide
hydrogen sulfide
Platinum
platinum
Hydrogen
hydrogen
decomposition
Decomposition
oxidation
Recovery
Oxidation
Sulfur Oxides
Sulfides
sulfide
Silicon Dioxide
silica
Silica
Oxygen
Sulfur Dioxide

ASJC Scopus subject areas

  • Polymers and Plastics
  • Environmental Science(all)
  • Chemical Engineering (miscellaneous)

Cite this

Hydrogen recovery from hydrogen sulfide by oxidation and by decomposition. / Yang, Barry L.; Kung, Harold H.

In: Industrial and Engineering Chemistry Research, Vol. 33, No. 5, 1994, p. 1090-1097.

Research output: Contribution to journalArticle

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