Catalytic process for removing sulfur dioxide from gas streams

Details Catalytic process for removing sulfur dioxide from gas streams Catalytic process for removing sulfur dioxide from gas streams

C - Chemistry, Metallurgy

01

B

23/332

C01B 17/04 (2006.01) B01D 53/86 (2006.01)

Patent

CA 1080441

ABSTRACT A process for the catalytic reduction of sulfur dioxide in gas streams containing sulfur dioxide to elemental sulfur using a reducing gas such as hydrogen or, preferably, carbon monoxide, and a material of the formula xLa2O3 . yCo2o3, where x and y are varied independently from 1-3 (including non-integers). There are also novel compositions where x ? y. In a further aspect of this invention, a gas stream containing hydro- gen sulfide or carbonyl sulfide and sulfur dioxide is passed through a reac- tion chamber containing xLa2O3 . yCo2O3, where x and y are as set forth above, to catalytically produce at a sufficiently elevated temperature elemental sulfur with concomitant reduction of the undesired hydrogen sulfide or car- bonyl sulfide and sulfur dioxide.

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