The Role of Metallic Copper in the Selective Hydrodeoxygenation of Glycerol to 1,2-Propanediol over Cu/ZrO2

被引:16
作者
Gabrysch, Thomas [1 ]
Peng, Baoxiang [1 ,2 ]
Bunea, Sorin [1 ]
Dyker, Gerald [3 ]
Muhler, Martin [1 ,2 ]
机构
[1] Ruhr Univ Bochum, Lab Ind Chem, D-44780 Bochum, Germany
[2] Max Planck Inst Chem Energy Convers, D-45470 Mulheim, Germany
[3] Ruhr Univ Bochum, Lab Organ Chem 2, D-44780 Bochum, Germany
关键词
glycerol; hydrodeoxygenation; metallic copper; 1,2-propanediol; zirconia; VALUE-ADDED PRODUCTS; ION-EXCHANGE-RESIN; REACTION-MECHANISM; CATALYTIC CONVERSION; BIODIESEL PRODUCTION; METHANOL SYNTHESIS; PROPYLENE-GLYCOL; HYDROGENOLYSIS; ETHERIFICATION; TRANSFORMATION;
D O I
10.1002/cctc.201701748
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
A series of Cu/ZrO2 catalysts with nominal CuO loadings of 5, 10, 18 and 31 wt.% was synthesized by co-precipitation, characterized and applied in the hydrodeoxygenation of glycerol under mild reaction conditions (200 degrees C, 25 bar H-2). These catalysts were highly selective for the cleavage of C-O bonds while preserving C-C bonds leading to 95% selectivity to 1,2-propanediol. The conversion of glycerol was observed to be linearly correlated with the specific copper surface area derived from N2O frontal chromatography. The reaction was found to occur through the dehydration of glycerol to acetol followed by its hydrogenation to 1,2-propanediol. Metallic copper was identified as the active site for both reactions suggesting the acid ZrO2 sites to be blocked by water. Reusability studies showed that the catalyst was relatively stable and the conversion decreased by only 18% after three cycles.
引用
收藏
页码:1344 / 1350
页数:7
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