Hits:

Indexed by:期刊论文

Date of Publication:2013-04-04

Journal:CATALYSIS SCIENCE & TECHNOLOGY

Included Journals:SCIE、EI、Scopus

Volume:3

Issue:4

Page Number:1108-1115

ISSN No.:2044-4753

Abstract:Supported Cu-Cr catalysts were prepared by a non-alkoxide sol-gel route, and characterized by X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM), H-2-temperature programmed reduction (H-2-TPR) and X-ray photoelectron spectroscopy (XPS) measurement. Their structures were significantly tuned by the Cu-Cr molar ratio. CuCr2O4, CuCr2O4-CuO and CuCr2O4-Cr2O3 structures were confirmed in CuCr(0.5), CuCr(4) and CuCr(0.25) catalysts, respectively. A direct interaction between CuCr2O4 and CuO or Cr2O3 in CuCr(4) and CuCr(0.25) catalyst was observed by the H-2-TPR and XPS results. The catalytic performance of Cu-Cr catalysts with various structures was examined by hydrogenolysis reaction of high concentrated glycerol. Under mild conditions (2.0 MPa and 130 degrees C) and high concentration (100 wt%), the maximum conversion (52%) was obtained over the CuCr(0.5) catalyst, while the CuCr(4) catalyst gave the highest selectivity of 1,2-PD (up to 100%). This finding will result in the production of less waste water and lower energy consumption in the following separation steps during glycerol hydrogenolysis.