Acta Phys. -Chim. Sin. ›› 2014, Vol. 30 ›› Issue (3): 527-534.doi: 10.3866/PKU.WHXB201401072

• CATALYSIS AND SURFACE SCIENCE • Previous Articles     Next Articles

Influence of Cs Substitution on the Structural Properties and Catalytic Performance of Ni-H3PW12O40/SiO2 Catalysts

JIN Hao1,2, SUN Xiao-Dan1, DONG Shu3, WU Yi-Zhi3, SUN Su-Hua1, LIU Jie1, ZHU Hui-Hong1, YANG Guang1, YI Xiao-Dong2, FANG Wei-Ping2   

  1. 1 Fushun Research Institute of Petroleum and Petrochemicals, SINOPEC, Fushun 113001, Liaoning Province, P. R. China;
    2 State Key Laboratory for Physical Chemistry of the Solid Surfaces, National Engineering Laboratory for Green Chemical Productions of Alcohols, Ethers and Esters, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian Province, P. R. China;
    3 PetroChina Fushun Petrochemical Company No.2 Refinery, Fushun 113004, Liaoning Province, P. R. China
  • Received:2013-10-08 Revised:2014-01-06 Published:2014-02-27
  • Contact: JIN Hao, YI Xiao-Dong E-mail:jinhao.fshy@sinopec.com;xdyi@xmu.edu.cn
  • Supported by:

    The project was supported by the National Key Basic Research Program of China (973) (2010CB226903), National Natural Science Foundation of China (21073147, 21303140), and Program for Changjiang Scholars and Innovative Research Team in University, China (IRT1036).

Abstract:

Cs-substituted Ni-CsxH3-xPW12O40/SiO2 catalysts were prepared by two-step impregnation and in situ reaction on the support. The catalysts were characterized by N2 adsorption measurements, inductively coupled plasma atomic emission spectrometry, Raman spectroscopy, in situ X-ray diffraction, NH3-temperature programmed desorption (TPD), H2-temperature programmed reduction, H2-TPD, and Fourier transform infrared spectroscopy. The hydrocracking of n-decane was used to study the catalytic performance of the Ni-CsxH3-xPW12O40/SiO2 catalysts. The highest C5+ yield obtained for 8%Ni-50%Cs1.5H1.5PW/SiO2 was superior to those of 8%Ni-50% H3PW/SiO2 and an industrial catalyst. The conversion of n-decane slightly decreased and the C5+ selectivity increased with increasing Cs content in the CsxH3-xPW catalysts. Ni-CsxH3-xPW12O40/SiO2 catalysts possessed relatively large pore sizes, so the improved selectivity might have been due to a weaker acidity of the catalysts. The reduced conversion might have been due to a weaker hydrogenation ability.

Key words: Hydrocracking, n-Decane, Bifunctional catalyst, Ni, Cs, H3PW12O40

MSC2000: 

  • O643