Chinese Journal of Catalysis ›› 2014, Vol. 35 ›› Issue (10): 1768-1778.DOI: 10.1016/S1872-2067(14)60182-0

• Articles • Previous Articles    

Preparation of LaXCoO3 (X = Mg, Ca, Sr, Ce) catalysts and their performance for steam reforming of ethanol to hydrogen

Fei Maa,b, Zhenwu Dinga,c, Wei Chua,c, Shixiong Haoa,d, Tao Qib   

  1. a Department of Chemical Engineering, Sichuan University, Chengdu 610065, Sichuan, China;
    b National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China;
    c Sichuan Provincial Engineering Technology Center for Environmental Protection Catalytic Materials, Chengdu 610064, Sichuan, China;
    d Department of Chemical Engineering, Sichuan University of Science and Engineering, Zigong 643000, Sichuan, China
  • Received:2014-04-25 Revised:2014-06-28 Online:2014-09-28 Published:2014-09-30
  • Supported by:

    This work was supported by the National Basic Research Program of China (973 Program, 2011CB201202).

Abstract:

Perovskite nanocomposite catalysts LaXCoO3 (X = Mg, Ca, Sr, or Ce; n(La):n(X) = 3:2) have been prepared by a citric acid-complexing method and used for steam reforming of ethanol (SRE), leading to hydrogen generation. The samples were characterized by X-ray diffraction, infrared spectroscopy, scanning electron microscopy, X-ray photoelectron spectroscopy, N2 adsorption-desorption, and H2 temperature-programmed reduction. The effects of elemental substitution in the LaCoO3 perovskite were studied, and the catalytic performance and primary stability of the hydrogen production from SRE were investigated. In the highly substituted samples, only the Ce-doped sample was isolated as the pure perovskite phase. The presence of a Co3O4 phase in the Ca-doped or Sr-doped samples was beneficial for the reduction of the active Co component, while Sr-doped or Ce-doped samples showed good activity and stability. The sample incorporating Sr demonstrated better catalytic performance than those of other samples.

Key words: Citric acid-complexing method, Perovskite, Cobalt, Composite catalyst, Ethanol steam reforming, Hydrogen