期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 181, 期 -, 页码 47-57出版社
ELSEVIER
DOI: 10.1016/j.apcatb.2015.07.037
关键词
Bioglycerol; Hydrogenolysis; 1,2-Propanediol; Ce-promoted Cu/Mg catalyst; Characterization studies
资金
- Council of Scientific and Industrial Research (CSIR), New Delhi
- Department of Science and Technology, New Delhi, under SERB Scheme [SB/S1/PC-106/2012]
The selective hydrogenolysis of bioglycerol to 1,2-propanediol was investigated over a series of Ce-promoted Cu/Mg catalysts, namely, Cu/Mg (1/9), Cu/Ce/Mg (1/1/5), Cu/Ce/Mg (1/3/5), and Cu/Ce/Mg (1/5/5) prepared by a coprecipitation method. The physicochemical properties of the synthesized catalysts were analyzed by XRD, Raman, BET, BJH, XPS, NH3- and CO2-TPD, and H-2-TPR techniques. The XRD and BET surface area results indicated that addition of Ce to Cu/Mg sample remarkably inhibits the crystal growth of CuO and improves the specific surface area. More number of oxygen vacancy defects were found in the Cu/Ce3/Mg sample, as evidenced from Raman studies. The reducible nature of the Cu/Mg sample was significantly enhanced after the Ce-incorporation. The NH3- and CO2-TPD results show that the acid-base properties of the Ce-promoted Cu/Mg samples are highly dependent on the Ce-loading. Among the synthesized samples, the Cu/Ce3/Mg sample exhibited higher concentration and superior strength of acidic sites. The achieved activity order of various catalysts for glycerol hydrogenolysis is Cu/Mg
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