CO_2 HYDROGENATION TO METHANOL OVER CU/ZNO/ZRO_2 CATALYSTS PREPARED BY CHEMICAL REDUCTION

摘要

The Cu/ZnO/ZrO_2 catalysts were prepared and reduced with thernintroduction of NaBH4 in the synthesis process. A crystallized Cu_2Ornphase is found in the XRD pattern , which indicates Cu~(2+) in the coprecipitationrnsystem is reduced by NaBH_4. Upon the addition ofrnNaBH_4, the amount of desorbed H_2 increase significantly and thernCH_3OH selectivity and CH_3OH yield also increase which may due tornthe fact that a significant amount of H_2 desorption is favorable tornCO_2 hydrogenation to methanol.