System for tail gas treatment of sulfur recovery unit

摘要

A process for recovering sulfur from a tail gas stream, the process providing a tail gas stream to a chemical cycle combustion (CLC) unit, wherein the tail gas stream comprises a sulfide component; Providing an oxygen carrier to the CLC unit, wherein the oxygen carrier comprises calcium carbonate; Providing an air stream to the CLC unit, wherein the air stream contains oxygen; And reacting the sulfide component of the CLC unit with a calcium compound and air to produce a production effluent, wherein the production effluent comprises calcium sulfate.