Surface Properties of CuO/ZnO/Al_2O_3 Catalyst for Methanol Synthesis in Slurry Reactor

The CuO/ZnO/Al_2O_3 slurry catalyst was prepared by parallel flow co-precipitation at different Cu/Zn molar ratios and characterized by N2 adsorption-desorption,X-ray diffraction,H2 temperature-programmed reduction,and X-ray photoelectron spectroscopy.When Cu/Zn≤1,the quantity of highly dispersed copper oxide on the catalyst surface was increased with increasing copper content,which favored the interaction of CuO and ZnO and increased catalyst activity for methanol synthesis.When Cu/Zn1,the quantity of bulk copper was increased with increasing copper content,the crystallinity of ZnO was increased,and the interaction of CuO and ZnO was weakened,leading to the decrease in the activity of the CuO/ZnO/Al_2O_3 catalyst.