Recovering sulfur from a gas stream containing hydrogen sulfide by
oxidizing the gas stream to convert the hydrogen sulfide in the gas
stream to sulfur oxide, and thus form a sulfur oxide enriched gas stream.
The sulfur oxide enriched gas stream is contacted with a solid, sulfation
resistant adsorbent bed at relatively low temperatures to extract the
sulfur oxides and retain them as sulfur compounds, thus forming a sulfur
oxide depleted gas stream. The adsorbent bed is then contacted with an
inert or reducing gas stream to reduce the retained sulfur compounds to
sulfur and/or sulfur dioxide and thereby form an enriched sulfur and/or
sulfur dioxide bearing stream. The elemental sulfur is recovered and/or
the sulfur dioxide bearing stream may be recycled to the Claus unit for
further conversion.