Acta Phys. -Chim. Sin. ›› 2012, Vol. 28 ›› Issue (03): 674-680.doi: 10.3866/PKU.WHXB201112271

• CATALYSIS AND SURFACE SCIENCE • Previous Articles     Next Articles

Modified Bauxite Supported Ruthenium Catalysts for Hydrogen Evolution in the Water-Gas Shift Reaction

JIANG Li-Long, MA Yong-De, CAO Yan-Ning, YANG Yang, WEI Ke-Mei   

  1. National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University, Fuzhou 350002, P. R. China
  • Received:2011-09-19 Revised:2011-12-19 Published:2012-02-23
  • Contact: JIANG Li-Long
  • Supported by:

    The project was supported by the Natural Science Foundation of Fujian Province, China (2011J01036), Foundation of Fujian Provincial Department of Education, China (JA09012), Talents Foundation of Fuzhou University, China, and Technology Development Foundation of Fuzhou University, China (2010-XQ-05).

Abstract: Hydrothermally treated bauxite with high surface area was used as a ruthenium-based catalyst support. A series of Ru/bauxite and 2.0% (mass fraction) Ru/Al2O3 catalysts were prepared by incipientwetness impregnation. The loading content of ruthenium in the Ru/bauxite catalysts was varied from 1.0% to 4.0%. The catalysts were thoroughly characterized by X-ray fluorescence (XRF), low temperature N2 physical adsorption, X-ray diffraction (XRD), H2 temperature-programmed reduction (H2-TPR), and CO temperature-programmed desorption (CO-TPD). The performances of the catalysts for the water-gas shift reaction were also investigated. The results indicated that Ru/bauxite catalysts possess an excellent ability to evolve hydrogen in the water-gas shift reaction. This was attributed to the interaction between Ru and Fe2O3 in the modified bauxite, which could decrease the reduction temperature of Fe2O3, and also improve the adsorption-desorption behavior and decrease the desorption temperature of Ru/bauxite catalysts for CO molecules, resulting in higher activity in the water-gas shift reaction.

Key words: Bauxite, Ru/bauxite catalyst, Water-gas shift, Hydrogen evolution


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