Oxidative carbonylation of glycerol to glycerol carbonate catalyzed by PdCl2(phen)/KI

被引:120
作者
Hu, Jianglin [1 ]
Li, Jinjin [1 ]
Gu, Yanlong [1 ,2 ]
Guan, Zhenhong [1 ]
Mo, Wanling [1 ]
Ni, Youming [1 ]
Li, Tao [1 ,2 ]
Li, Guangxing [1 ,2 ]
机构
[1] Huazhong Univ Sci & Technol, Sch Chem & Chem Engn, Wuhan 430074, Hubei, Peoples R China
[2] Huazhong Univ Sci & Technol, Hubei Key Lab Mat Chem & Serv Failure, Wuhan 430074, Hubei, Peoples R China
关键词
Oxidative carbonylation; Glycerol carbonate; PdCl2(phen)/KI; Valorize glycerol; Cyclic voltammetry; DIMETHYL CARBONATE; PALLADIUM COMPLEXES; EFFICIENT; CHEMICALS; DIOXIDE; TRANSESTERIFICATION; METHANOL; PERFORMANCE;
D O I
10.1016/j.apcata.2010.07.059
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
We present a direct and highly efficient approach for synthesizing glycerol carbonate, via the catalytic oxidative carbonylation of glycerol, using PdCl2(phen) (phen = 1,10-phenanthroline) as catalyst with the aid of RI. The palladium catalyst loading as low as 0.25 mol% is sufficient for high conversion (92%) and selectivity (99%) at the reaction condition: 2.0 MPa CO, 1.0 MPa O-2, 140 degrees C, 2h. The turnover frequency (TOF) reaches 184 h(-1). Furthermore, using crude glycerol, we achieved 85% conversion of glycerol. We discuss in detail a plausible mechanism based on PdI2(phen) as an intermediate. We propose that there is synergistic effect of l- and 1,10-phenanthroline on the performance of the Pd complex catalyst. Based on the cyclic voltammograms, the reduction of PdI2(phen) occurred at a more positive potential than that of PdCl2(phen). This may explain why the catalytic activity of PdI2(phen) was more effective than that of PdCl2(phen). (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码:188 / 193
页数:6
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