Kinetics of sulfur transfer from H2S to digenite (Cu2-xS) at 500°C

V. K. Pareek, T. A. Ramanarayanan, J. D. Mumford, A. Ozeckcin

Research output: Contribution to journalArticle

4 Scopus citations

Abstract

The kinetics of sulfur transfer from H2S to cuprous sulfide (digenite) at 500°C has been established by the resistance relaxation technique. The resistance measurements have been carried out by the van der Pauw method, which uses a four probe configuration. The rate of the forward reaction decreases with the increase in the activity of sulfur in the sulfide (rate ∞as-0.55) while the rate of the backward reaction is found to be nearly independent of the sulfur activity. Based on these results, the rate limiting step for sulfur transfer reaction to digenite is shown to be: H2S (g) + 2e- = S2-(ad) + H2(g).

Original languageEnglish (US)
Pages (from-to)11-25
Number of pages15
JournalCatalysis Letters
Volume27
Issue number1-2
DOIs
StatePublished - Mar 1 1994
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)

Keywords

  • cuprous sulfide
  • non-stoichiometry
  • rate limiting step
  • reaction pathways
  • resistance relaxation
  • sulfur activity

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