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Indexed by:期刊论文

Date of Publication:2009-06-01

Journal:CATALYSIS LETTERS

Included Journals:SCIE、EI

Volume:130

Issue:1-2

Page Number:169-176

ISSN No.:1011-372X

Key Words:Glycerol; Hydrogenolysis; Cu-Cr catalyst; Carbon template; High surface area

Abstract:High surface area Cu-Cr catalysts had been prepared via a facile carbon template route, and characterized by N(2) physisorption, temperature-programmed reduction, X-ray diffraction, Raman spectroscopy, and transmission electron microscopy. The catalytic properties of the nanostructured Cu-Cr catalysts were evaluated by glycerol hydrogenolysis. The results show that the specific surface area of the obtained Cu-Cr catalyst can reach above 50 m(2)/g, while those of CuO and Cr(2)O(3) are about 10 and 50 m(2)/g, respectively. The surface areas of Cu-Cr catalysts can be controlled by carbon template, Cu/Cr molar ratio, and treatment atmosphere and final temperature. The reduced Cu-Cr catalysts show significant catalytic activity and selectivity in glycerol hydrogenolysis, i.e. above 51% conversion of glycerol and above 96% selectivity to 1,2-propanediol in 4.15 MPa H(2) at 210 A degrees C. The Cu-Cr catalysts with low Cu/Cr molar ratio present high conversion of glycerol, which is different from the conventional copper-chromite catalyst.