Highly active Cu/SiO2 catalysts for hydrogenation of diethyl malonate to 1,3-propanediol

作者：Ding, Tongmei; Tian, Hengshui^*; Liu, Jichang; Wu, Wenbin; Yu, Jintao

来源：Chinese Journal of Catalysis, 2016, 37(4): 484-493.

DOI：10.1016/S1872-2067(15)61053-1

• Copper
• Silica
• Diethyl malonate
• Hydrogenation
• 1,3-Propanediol
• Calcination temperature

Cu/SiO2 catalysts prepared by the ammonia evaporation method were applied to hydrogenation of diethyl malonate to 1,3-propanediol. The calcination temperature played an important role in the structural evolution and catalytic performance of the Cu/SiO2 catalysts, which were systematically characterized by N-2 adsorption-desorption, inductively coupled plasma-atomic emission spectroscopy, N2O chemisorption, X-ray diffraction, Fourier transform infrared spectroscopy, H-2 temperature-programmed reduction, transmission electron microscopy, and X-ray photoelectron spectroscopy. When the Cu/SiO2 catalyst was calcined at 723 K, 90.7% conversion of diethyl malonate and 32.3% selectivity of 1,3-propanediol were achieved. Compared with Cu/SiO2 catalysts calcined at other temperatures, the enhanced catalytic performance of the Cu/SiO2 catalyst calcined at 723 K can be attributed to better dispersion of copper species, larger cupreous surface area and greater amount of copper phyllosilicate, which results in a higher ratio of Cu+/Cu-0. The synergetic effect of Cu-0 and Cu+ is suggested to be responsible for the optimum activity.

• 出版日期2016-4
• 单位华东理工大学