Method for regenerating COS hydrolysis catalyst
The method for regenerating a carbonyl sulfide (COS) hydrolysis catalyst according to the present invention is a method for regenerating a Ba/TiO 2 based carbonyl sulfide (COS) hydrolysis catalyst by hydrolyzing COS which is contained in a gas obtained by gasifying a carbon raw material, wherein a spent COS hydrolysis catalyst is washed with water, dried, immersed in an aqueous solution of a barium salt for a prescribed amount of time, dried, and calcined so as to re-support the active component on the surface of the COS hydrolysis catalyst, thus enabling the regeneration of the COS hydrolysis catalyst.
1. A method for regenerating a barium oxide-based carbonyl sulfide (COS) hydrolysis catalyst by hydrolyzing COS which is contained in a gas obtained by gasifying a carbon raw material, wherein a spent COS hydrolysis catalyst is immersed in an aqueous solution of a barium salt for a prescribed amount of time, dried, and then calcined.
2. The method for regenerating a carbonyl sulfide (COS) hydrolysis catalyst according to claim 1 , wherein dust removal is performed prior to immersion.
3. The method for regenerating a carbonyl sulfide (COS) hydrolysis catalyst according to claim 1 , wherein drying is performed after water washing prior to immersion.
4. The method for regenerating a carbonyl sulfide (COS) hydrolysis catalyst according to claim 1 , wherein a temperature of the calcination is at least 200° C.
5. The method for regenerating a carbonyl sulfide (COS) hydrolysis catalyst according to claim 2 , wherein drying is performed after water washing prior to immersion.
6. The method for regenerating a carbonyl sulfide (COS) hydrolysis catalyst according to claim 2 , wherein a temperature of the calcination is at least 200° C.
7. The method for regenerating a carbonyl sulfide (COS) hydrolysis catalyst according to claim 3 , wherein a temperature of the calcination is at least 200° C.