Chinese Journal of Catalysis ›› 2016, Vol. 37 ›› Issue (4): 484-493.DOI: 10.1016/S1872-2067(15)61053-1

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

Tongmei Ding, Hengshui Tian, Jichang Liu, Wenbin Wu, Jintao Yu   

  1. School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
  • Received:2015-12-03 Revised:2016-02-13 Online:2016-03-30 Published:2016-03-30
  • Contact: Hengshui Tian

Abstract:

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 N2 adsorption-desorption, inductively coupled plasma-atomic emission spectroscopy, N2O chemisorption, X-ray diffraction, Fourier transform infrared spectroscopy, H2 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+/Cu0. The synergetic effect of Cu0 and Cu+ is suggested to be responsible for the optimum activity.

Key words: Copper, Silica, Diethyl malonate, Hydrogenation, 1,3-Propanediol, Calcination temperature