A gel-oxalate co-precipitation process for preparation of Cu/ZnO/Al_2O_3 ultrafine catalyst for methanol synthesis from CO_2+H_2: (II) effect of various calcination conditions

摘要

Cu/ZnO/Al_2O_3 methanol synthesis catalysts prepared by gel-oxalate co-precipitation method are found to be highly influenced by the calcination conditions. The structure and morphology of the catalysts were studied by nitrogen physisorption, N_2O decomposition adsorption, TEM, and XRD. The results show that the decomposition mechanism of catalyst precursors are quite different under different calcination conditions. Mild calcination processing and oxygen-rich atmospheres are proper calcination conditions for obtaining a high performance ultrafine Cu/ZnO/Al_2O_3 methanol synthesis catalyst.