Release Time:2019-03-09  Hits:

Indexed by: Journal Article

Date of Publication: 2010-01-01

Journal: GREEN CHEMISTRY

Included Journals: Scopus、SCIE

Volume: 12

Issue: 10

Page Number: 1835-1843

ISSN: 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.