New Catalytic System for Producing Pure Hydrogen -Water-gas-shift Reaction of Supported Copper Catalysts-

The catalytic activities of the low-temperature water-gas-shift (WGS) reaction were investigated for Al(2)O(3)-supported Cu catalysts containing CrO(x), MnO(x), FeO(x), CoO(x)., or NiO(x). The catalytic activity of Cu/Al(2)O(3) catalyst at 423 K was enhanced by the addition of transition metal oxide. FeO(x) and MnO(x) additives additionally gave the enhancement in the catalytic activity at 523 K. The preparation conditions concerning calcination temperature and MOx/Cu molar ratio were optimized for Cu-FeO(x)/Al(2)O(3) and Cu-CoOx/Al(2)O(3) catalysts. The reason why the catalytic activity was enhanced by adding Fe Ox and CoO(x) to Cu/Al(2)O(3) was proposed on the basis of XRD and H(2)-TPR results.