The Contribution of the Spatial Restriction for Improvement of Hydrogenation and Water‐tolerant for Cu/SiO₂ Catalysts by Varied Pores of Support

Abstract

The effect of spatial restriction f or Cu/SiO 2 catalysts on watertolerant performance was studied by ethyl acetate containing water hydrogenation. Copper species distributed on pore or surface of supports on the basis of the different pore diameter to produce spatial restriction, which played a vital role in the improvement of water-tolerant hydrogenation performance. The experimental and characterization results showed the growth of copper particle resulting from water could be suppressed due to the presence of spatial restriction. And the spatial restriction could also provide more chances for reactants to absorb on active sites, so that the negative effects of priority adsorption of water can be eliminated. These advantages improved the water resistance and hydrogenation performance of Cu/SiO 2 catalysts. Nonetheless, the oxidation effect was also enhanced at condition containing water due to the spatial restriction, which might have a negative effect on catalytic performance.