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Chemcial Industry and Engineering 2015, Vol. 32 Issue (2) :25-30    DOI: 10.13353/j.issn.1004.9533.2015.02.005
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Hydrogenolysis of Glycerol to 1,2-Propanediol on Cu-Based Catalysts Derived from Hydrotalcite-Like Precursors
Tian Shasha, Yang Juan, Chen Jixiang
School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China

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Abstract Cu-Zn-Al and Cu-Mg-Al catalysts were prepared from hydrotalcite-like precursors after calcination and reduction. The effect of M2+ (M=Zn or Mg) and M2+/Al3+ ratio on the catalyst structure and performance were investigated by means of XRD, H2-TPR, N2-sorption, H2-TPD, NH3-TPD, CO2-TPD and activity test. The hydrotalcite-like precursors were transformed to the spinel and/or metal oxides after calcination at 450 ��, from which the highly dispersed Cu-based catalysts were prepared after reduction at 270 ��. Compared with the Cu-Mg-Al catalysts, the Cu-Zn-Al catalysts had more amounts of adsorbed hydrogen due to the role of Zn species. With increasing Al2O3 content, the specific surface area and acid amount increased. The Cu-Mg-Al catalysts had more basic sites than the Cu-Zn-Al catalysts. In the hydrogenolysis of glycerol, Cu-Zn-Al[n(Cu):n(Zn):n(Al)=1:1:4] had the highest activity and selectivity to 1,2-propanediol, which is due to the largest amounts of surface Cu and acid sites. For the Cu-Mg-Al catalysts, there may be a synergism between the Cu and basic sites.
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Keywords�� hydrotalcite-like compound��   glycerol hydrogenolysis��   1,2-propanediol��   Cu-Mg-Al catalyst��   Cu-Zn-Al catalyst     
Received 2013-05-02;
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Tian Shasha, Yang Juan, Chen Jixiang.Hydrogenolysis of Glycerol to 1,2-Propanediol on Cu-Based Catalysts Derived from Hydrotalcite-Like Precursors[J]  Chemcial Industry and Engineering, 2015,V32(2): 25-30
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