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Indexed by:期刊论文

Date of Publication:2010-01-01

Journal:GREEN CHEMISTRY

Included Journals:SCIE、Scopus

Volume:12

Issue:10

Page Number:1835-1843

ISSN No.:1463-9262

Abstract:Supported Cu-containing bimetallic catalysts were prepared and used to convert glycerol to propanediols. The effects of supports, metals, metal loadings, and impregnation sequences were examined. A synergistic effect was observed between Cu and Ag when they were impregnated on gamma-Al(2)O(3). Characterizations revealed that the addition of Ag not only resulted in an in situ reduction of CuO, but also improved the dispersion of the Cu species on the support. A CuAg/Al(2)O(3) catalyst with optimal amounts of Cu and Ag (Cu/Ag molar ratio 7 : 3, 2.7 mmol Cu+Ag per gram of gamma-Al(2)O(3)) showed a near 100% selectivity to propanediols with a glycerol conversion of about 27% under mild reaction conditions (200 degrees C, 1.5 MPa initial H(2) pressure, 10 h, (Cu+Ag)/glycerol molar ratio of 3/100). Compared with a commercial copper chromite catalyst commonly used for this reaction, the CuAg/Al(2)O(3) catalyst had much higher activity and did not need a reduction pretreatment.