Acta Phys. -Chim. Sin. ›› 2015, Vol. 31 ›› Issue (Suppl): 90-94.doi: 10.3866/PKU.WHXB2014Ac02

• ARTICLE • Previous Articles     Next Articles

Effect of Thorium on Fischer-Tropsch Synthesis Performance over Impregnated and Eggshell Co/SiO2

LIU Zhi-Hua1, YU Chang-Chun1, YANG Pan2, LI Ran-Jia1, ZHOU Hong-Jun1, XU Chun-Ming1   

  1. 1 Institute of New Energy, China University of Petroleum (Beijing), Beijing 102249, P. R. China;
    2 Institute of Materials, China Academy of Engineering Physics, Mianyang 621700, Sichuan Province, P. R. China
  • Published:2015-05-20
  • Contact: YU Chang-Chun E-mail:yucc@cupb.edu.cn.cn
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (21376263).

Abstract:

Modification of impregnated Co/SiO2 (i-Co/SiO2) and eggshell Co/SiO2 (e-Co/SiO2) through addition of thorium (Th) was obtained by impregnation and spray coating processes, respectively. The effects of thorium on the structure, reduction behavior, and catalytic performance were characterized by X-ray diffraction (XRD), H2 temperature-programmed reduction (H2-TPR), and CO+H2 reaction. We found that the addition of Th in both impregnation and eggshell catalysts could improve selectivity towards heavy hydrocarbons (C5+) and suppress the formation of methane and light hydrocarbons. In impregnated Co/SiO2 catalysts, the presence of Th could promote dispersion of the active phase to enhance catalytic activity. However, when Th is added to eggshell Co/SiO2 catalysts, it may cover part of the active phase, leading to activity decline.

Key words: Thorium, Cobalt based catalyst, Impregnated catalyst, Eggshell catalyst, Fisher-Tropsch synthesis

MSC2000: 

  • O643.3