Catalytic performance and deactivation of precipitated iron catalyst for selective oxidation of hydrogen sulfide to elemental sulfur in the waste gas streams from coal gasification

Journal Article · Sat Sep 15 00:00:00 EDT 2007 · Industrial and Engineering Chemistry Research

DOI:https://doi.org/10.1021/ie061589z· OSTI ID:20969780

Mashapa, T N; Rademan, J D; van Vuuren, M J.J. ^[1]

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1. Sasol Technology Research & Development, Sasolburg (South Africa)

The selective oxidation of hydrogen sulfide to elemental sulfur, using a commercial, precipitated silica promoted ferric oxide based catalyst, was investigated in laboratory and pilot-plant reactors. Low levels of hydrogen sulfide (1-3 vol%) can be readily removed, but a continuous slow decrease in catalyst activity was apparent. X-ray photoelectron spectroscopy showed that the loss of activity was due to the formation of ferrous sulfate, which is known to be less active than the ferric oxide. In addition, studies using a model feed showed that the propene and HCN impurities in the plant feed stocks also act as potent catalyst poisons.

• OSTI ID: 20969780
• Journal Information: Industrial and Engineering Chemistry Research, Vol. 46, Issue 19; ISSN 0888-5885
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
CATALYSTS
COAL GASIFICATION
OXIDATION
HYDROGEN SULFIDES
SULFUR
IRON
CATALYSIS
CATALYTIC EFFECTS
DEACTIVATION
GASEOUS WASTES