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Indexed by:期刊论文

Date of Publication:2009-10-01

Journal:APPLIED CATALYSIS A-GENERAL

Included Journals:SCIE、EI、Scopus

Volume:367

Issue:1-2

Page Number:93-98

ISSN No.:0926-860X

Key Words:Glycerol; Hydrogenolysis; Propanediol; Copper; Support

Abstract:Supported Cu catalysts were synthesized and applied to convert glycerol, a renewable feedstock, to value-added propanediols. Among these catalysts, the gamma-Al(2)O(3) supported Cu catalysts showed superior performance. Unlike most supported precious metal catalysts, the scission of C-C bonds was successfully suppressed on the Cu/Al(2)O(3) catalysts without a sacrifice of glycerol conversion. The experimental results combined with the characterization studies using temperature programmed reduction (TPD) and X-ray diffraction (XRD) techniques revealed that the optimal Cu loading was 2.7 mmol of Cu metal/g of gamma-Al(2)O(3) and that the suitable pre-reduction temperature was 300 degrees C. The Cu/Al(2)O(3) catalyst with the optimized amount of Cu showed a selectivity to propanediols about 96.8% with a glycerol conversion about 49.6% under mild reaction conditions (220 degrees C, 1.5 MPa initial H(2) pressure, 10 h, Cu/glycerol molar ratio 3: 100). Compared with a commonly used commercial copper chromite catalyst, the Cu/Al(2)O(3) Presented much higher activity, selectivity and Cu usage efficiency and is non-toxic. (C) 2009 Elsevier B.V. All rights reserved.