Hydrogen Sulfide

Large sources of hydrogen sulfide (H2S) are treated as a resource from which sulfur is recovered. The normal recovery is to oxidize a part of the H2S to sulfur dioxide (SO2) and then react H2S and SO2 over an alumina-based catalyst in the Claus process as follows:

FIG. 5.20.19 CSA system. (Data from Tebodin B.V., The Hague, the Netherlands.)
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