Abstract
Abstract The kinetics of the selective oxidation of hydrogen sulfide to elemental sulfur have been studied. The Catalyst used consists of highly dispersed iron sulfate supported on silica. This catalyst shows both a high conversion of hydrogen sulfide and a high selectivity to sulfur. The kinetics indicate that the rate of the reoxidation of the catalyst mainly determines the activity of the catalyst for the selective oxidation of hydrogen sulfide. The resulting low surface coverage of active oxygen leads to a high selectivity to sulfur, because the low coverage strongly impedes the deep oxidation to sulfur dioxide. A high coverage of hydrogenated sulfur species is also necessary for obtaining high selectivities.
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