초록 ▼

A catalyst for removing carbon monoxide (CO) in a hydrogen rich gas according to a water gas shift reaction is provided, which is characterized in that platinum and rhenium are supported on rutile titania as a support. This catalyst provides a high CO conversion at a relatively low reaction temperat

A catalyst for removing carbon monoxide (CO) in a hydrogen rich gas according to a water gas shift reaction is provided, which is characterized in that platinum and rhenium are supported on rutile titania as a support. This catalyst provides a high CO conversion at a relatively low reaction temperature between 200° C. and 300° C. and is excellent in cost/performance due to a reduction in amount of supported platinum. It is preferred that a weight ratio of an amount of supported platinum to an amount of supported rhenium is in a range of 3:1 to 1:1, and particularly 3:2. In addition, when the catalyst is produced by supporting rhenium first and then platinum on the support, the catalyst performance can be remarkably improved.

대표청구항 ▼

1. A catalyst, comprising platinum and rhenium as catalyst metals on a rutile titania support, wherein the weight ratio of supported platinum to supported rhenium is in a range of 3:1 to 1:1. 2. The catalyst as set forth in claim 1, wherein when said catalyst is used in a water-gas shift reaction, a

1. A catalyst, comprising platinum and rhenium as catalyst metals on a rutile titania support, wherein the weight ratio of supported platinum to supported rhenium is in a range of 3:1 to 1:1. 2. The catalyst as set forth in claim 1, wherein when said catalyst is used in a water-gas shift reaction, a CO conversion of the catalyst in said water gas shift reaction is 60% or more when it is measured at a reaction temperature of 250° C., with respect to a mixture gas obtained by mixing a hydrogen rich gas containing about 12% of carbon monoxide with water such that a mole ratio of H2O/CO is substantially equal to 4.3, in the case that an amount of the hydrogen rich gas treated per unit weight of supported platinum is in a range of 5000 to 5500 cc/(min·g(Pt)). 3. The catalyst as set forth in claim 1, wherein the amount of supported platinum is in a range of 0.05 to 3% with respect to catalyst weight. 4. The catalyst as set forth in claim 1, wherein the amount of supported rhenium is in a range of 0.01 to 10% with respect to catalyst weight. 5. The catalyst as set forth in claim 1, wherein the amount of supported platinum is 1% with respect to catalyst weight. 6. The catalyst as set forth in claim 1, wherein the amount of supported platinum is 3% with respect to catalyst weight. 7. The catalyst as set forth in claim 1, wherein the amount of supported platinum is 0.5% with respect to catalyst weight. 8. The catalyst as set forth in claim 1, wherein the amount of supported rhenium is 0.33% with respect to catalyst weight. 9. The catalyst as set forth in claim 1, wherein the amount of supported rhenium is 0.67% with respect to catalyst weight. 10. The catalyst as set forth in claim 1, wherein the amount of supported rhenium is 1% with respect to catalyst weight. 11. A method of producing the catalyst as set forth in claim 1, comprising a first step of supporting rhenium on a rutile titania support, and a second step of supporting platinum on the support after the first step. 12. A method for removing carbon monoxide from a hydrogen rich gas mixture in a water gas shift reaction comprising contacting said mixture with the catalyst as set forth in claim 1. 13. The method according to claim 12, wherein the carbon monoxide is removed at a temperature of 200-300° C. 14. A catalyst, comprising platinum and rhenium as catalyst metals on a rutile titania support, wherein the weight ratio of supported platinum to supported rhenium is in a range of 3:1 to 1:3. 15. The catalyst as set forth in claim 14, wherein the weight ratio of supported platinum to supported rhenium is 3:1. 16. The catalyst as set forth in claim 14, wherein the weight ratio of supported platinum to supported rhenium is 3:2. 17. The catalyst as set forth in claim 14, wherein the weight ratio of supported platinum to supported rhenium is 1:1. 18. The catalyst as set forth in claim 14, wherein the weight ratio of supported platinum to supported rhenium is 1:3. 19. A catalyst, comprising platinum and rhenium as catalyst metals on a rutile titania support, which is in the form of a pellet having a particle size of 0.5 to 1 mm. 20. A catalyst, comprising platinum and rhenium as catalyst metals on a rutile titania support, which is in the form of a pellet having a particle size of 1.4 to 2.0 mm.