Catalysts for water gas shift reaction, method for removing carbon monoxide in hydrogen gas and fuel cell generation system

Abstract

There is provided a catalyst for a water gas shift reaction in a hydrogen gas which is able to effectively remove CO in the hydrogen gas within a broader temperature range. Such a catalyst for the water gas shift reaction is characterized in that a metal oxide carrier supports at least platinum. The catalyst can be used for removing carbon monoxide in the hydrogen gas. Particularly, such a catalyst can be used in the water gas shift reaction for removing carbon monoxide in a reformed gas in a fuel cell generation system.

1 - 12 . (Canceled).  
     
     
         13 . A carbon monoxide removing unit which contains a catalyst for a water gas shift reaction comprising at least platinum and rhenium, both supported on a metal oxide carrier, 
 wherein said catalyst is capable of contacting a hydrogen gas having an initial carbon monoxide concentration, thereby producing a hydrogen gas having a reduced carbon monoxide concentration compared to said initial carbon monoxide concentration.    
     
     
         14 . The carbon monoxide removing unit according to  claim 13 , wherein an amount of said platinum is from 0.1% to 10% by weight based on a weight of the metal oxide carrier.  
     
     
         15 . The carbon monoxide removing unit according to  claim 13 , wherein an amount of said rhenium is from 0.1% to 10% by weight based on a weight of the metal oxide carrier.  
     
     
         16 . The carbon monoxide removing unit according to  claim 13 , wherein said catalyst further comprises at least one metal selected from the group consisting of yttrium, calcium, chromium, samarium, cerium, tungsten, neodymium, praseodymium, magnesium, molybdenum and lanthanum supported on said metal oxide carrier.  
     
     
         17 . The carbon monoxide removing unit according to  claim 16 , wherein an amount of said metal is from 0.1% to 10% by weight based on a weight of said metal oxide carrier.