Acta Phys. -Chim. Sin. ›› 2012, Vol. 28 ›› Issue (06): 1461-1466.doi: 10.3866/PKU.WHXB201203302

• CATALYSIS AND SURFACE SCIENCE • Previous Articles     Next Articles

Effect of CaO Modification on Performance of CuZnAlZr Catalyst in Synthesis of Higher Alcohols from Synthesis Gas

ZHU Qiu-Feng, ZHANG Rong-Jun, HE De-Hua   

  1. Innovative Catalysis Program, Key Laboratory of Organic Optoelectronics and Molecular Engineering of Ministry of Education, Department of Chemistry, Tsinghua University, Beijing 100084, P. R. China
  • Received:2012-01-07 Revised:2012-03-14 Published:2012-05-17
  • Contact: HE De-Hua
  • Supported by:

    The project was supported by the National High Technology Research and Development Program of China (863) (2007AA05Z332).

Abstract: CaO modified CuZnAlZr mixed oxide catalysts were prepared by mechanical mixing and co-precipitation methods, and their catalytic performances for CO hydrogenation to higher alcohols were investigated using a continuous flow high-pressure fixed-bed micro-reactor. The catalysts were characterized by X-ray diffraction (XRD), N2-adsorption-desorpotion, temperature-programmed reduction of H2 (H2-TPR), and temperature-programmed desorption of CO2 (CO2-TPD). The results showed that doping with CaO did not alter the textural properties of the catalyst, but increased the number of basic sites. Furthermore, the CaO-modified CuZnAlZr catalysts possessed both weak and medium strength basic sites, while unmodified CuZnAlZr catalyst possessed only weak basic sites. Catalytic performance, assessed by CO hydrogenation to C2+ alcohols, was improved in the CaO-doped CuZnAlZr catalyst relative to the undoped catalyst.

Key words: CaO modification, CuZnAlZr catalyst, Synthesis gas, Higher alcohol