Patent ID: 7910077
Filing Date: 2011-03-22
Classification: B01D,C01B

Abstract:
1. A plant comprising: a source that is configured to provide an oxygen-containing acid gas comprising a plurality of sulfur species; a reducing gas generator coupled to the source and configured to receive the oxygen-containing acid gas, and further configured to operate under conditions effective to remove oxygen in the oxygen-containing acid gas and to produce an oxygen depleted gas that is enriched in hydrogen and carbon monoxide; a cooler that is configured to reduce a temperature of the oxygen depleted gas to a temperature between 400-600° F. to so form a cooled oxygen depleted gas; a catalytic reactor coupled to the reducing gas generator and configured to receive the cooled oxygen depleted gas; a direct reduction catalyst disposed in the catalytic reactor, wherein the catalytic reactor is configured to convert at least one of the plurality of sulfur species to elemental sulfur and an offgas depleted in the sulfur species; and wherein the reducing gas generator, the direct reduction catalyst, and the catalytic reactor are further configured to prevent reduction of the at least one of the plurality of sulfur species in a Claus reaction.