Selective CO removal in the H2-rich stream through a double-bed system composed of non-noble metal catalysts

Abstract The CO concentration in the effluent from the water-gas shift reactor can be reduced to be less than 15 ppm from about 1 vol through the double bed system composed of CuO-CeO 2 , which can oxidize CO selectively in the presence of excess H 2 , and Ni/Y-ZrO 2 , which is active for CO methanation in the presence of excess CO 2 , over a wide reaction temperature range.