Acta Phys. -Chim. Sin. ›› 2014, Vol. 30 ›› Issue (11): 2127-2133.doi: 10.3866/PKU.WHXB201409121

• CATALYSIS AND SURFACE SCIENCE • Previous Articles     Next Articles

Study of Ce-Cu-Co/CNTs Catalysts for the Synthesis of Higher Alcohols and Ethanol from Syngas

HAN Tao1, HUANG Wei1, WANG Xiao-Dong1,2, TANG Yu1, LIU Shuang-Qiang1, YOU Xiang-Xuan1   

  1. 1. Key Laboratory of Coal Science and Technology of Ministry of Education and Shanxi Province, Taiyuan University of Technology, Taiyuan 030024, P. R. China;
    2. State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, P. R. China
  • Received:2014-06-05 Revised:2014-09-10 Published:2014-10-30
  • Contact: HUANG Wei E-mail:huangwei@tyut.edu.cn
  • Supported by:

    The project was supported by the Key Program of National Natural Science Foundation of China (21336006), General Program of National Natural Science Foundation of China (21176176), Research Fund for the Doctoral Program of Higher Education of China (20111402130002) and Foundation of State Key Laboratory of Coal Conversion, China (J14-15-603).

Abstract:

A series of Ce-Cu-Co/carbon nanotubes (CNTs) catalysts with different Ce contents were prepared by co-impregnation, and the catalytic performance was investigated for the synthesis of higher alcohols from syngas. The catalysts were characterized by X-ray diffraction (XRD), temperature-programmed reduction of H2 (H2-TPR), N2 adsorption-desorption isotherms (BET), transmission electron microscopy (TEM), and temperature-programmed desorption of CO (CO-TPD). The results showed that at a Ce content of 3% the catalyst had the highest catalytic activity. The formation rate and selectivity of alcohol reached 696.4 mg·g-1· h-1 and 59.7%, where the mass fraction of ethanol was 46.8% of the total amount of alcohols. The addition of an appropriate amount of Ce facilitated the dispersion of Cu and promoted reduction of the catalysts. It also markedly increased the adsorption capacity for CO, and significantly improved the formation of active sites for alcohols, which is favorable for the catalytic activity and to improve the selectivity of alcohols. Research showed that combining the CuCo-based catalyst, which has high activity and a high ability of carbon chain growth, with the confinement effect of CNTs can result in a narrow distribution of alcohols and significantly improve the selectivity of ethanol.

Key words: Ce, CuCo/CNTs catalyst, Syngas, Higher alcohol, Ethanol

MSC2000: 

  • O643