Effect of water on heterogeneous catalytic water-gas shift reaction in supercritical water

Abstract

 Water gas shift reaction in the presence of heterogeneous catalysts was examined in supercritical water at 673 K. 
These catalysts catalyzed water gas shift reaction and the main products were CO₂ and H₂. 
In all cases, CO conversion tended to decrease with increasing water density for all catalysts, which means
that water essentially suppressed heterogeneous catalytic water gas shift reaction in supercritical water.  
Water would cover on active sites and stabilize the adsorbed species on catalyst to decrease the ratio of vacancy of active sites on catalyst.