FIELD: gas treatment.
SUBSTANCE: method comprises oxidizing part of hydrogen sulfide in gas stream into sulfur dioxide using oxygen or oxygen-containing gas; subjecting thus treated gas to Claus reaction in at least two catalytic stages; and catalytic reduction of SO2 in gas leaving the last of at least two indicated catalytic stages, catalytic reduction proceeding in catalyst bed located downstream of the last Claus process catalytic stage.
EFFECT: stabilized and increased sulfur removal degree.
8 cl, 6 dwg, 2 ex
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