Acta Phys. -Chim. Sin. ›› 2011, Vol. 27 ›› Issue (09): 2185-2190.doi: 10.3866/PKU.WHXB20110824

• CATALYSIS AND SURFACE SCIENCE • Previous Articles     Next Articles

Hydrogen Production from Steam Reforming of Ethanol over Pd Promoted ZnO/Al2O3 Catalysts

CHEN Meng-Nan1,2, ZHANG Dong-Yun1,3, THOMPSON Levi T.2, MA Zi-Feng1   

  1. 1. Department of Chemical Engineering, Shanghai JiaoTong University, Shanghai 200240, P. R. China;
    2. Department of Chemical Engineering, University of Michigan, Ann Arbor, MI 48109, USA;
    3. Department of Material Science and Engineering, Shanghai Institute of Technology, Shanghai 201418, P. R. China
  • Received:2011-03-29 Revised:2011-05-12 Published:2011-08-26
  • Contact: MA Zi-Feng
  • Supported by:

    The project was supported by the National Key Basic Research Program of China (973) (2007CB209705).

Abstract: Pd promoted ZnO/Al2O3 catalysts were prepared by impregnation method. The hydrogen production performance upon the steam reforming of ethanol (SRE) over the prepared catalysts was evaluated with n(H2O):n(C2H5OH) of 3:1 at 450 °C and atmospheric pressure. The results show that H2 and CH3CHO were the main products during the SRE reaction over the prepared catalysts. Different from the ZnO/Al2O3 catalysts, the Pd promoted ZnO/Al2O3 catalysts favored C-C scission during the SRE and thus a higher C2H5OH conversion of 65% and a H2 selectivity of 55% were obtained over the prepared Pd promoted catalysts. BET, transmission electron microscopy (TEM), and thermogravimetry-differential scanning calorimetry-mass spectrometry (TG-DSC-MS) coupling techniques were used to analyze the coking behavior on the catalyst surface. We found that Pd promotion does not prevent the formation of coke on the ZnO/Al2O3 catalysts.

Key words: Ethanol, Hydrogen production, Palladium, Zinc oxide, Alumina


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