期刊
FUEL
卷 305, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.fuel.2021.121495
关键词
Polystyrene; Multiple active centers; Epoxides; Carbon dioxide; Atmospheric pressure
资金
- National Natural Science Foundation of China [21975064]
- Program of Henan Center for Outstanding Overseas Scientists [GZS2020011]
- Henan University's first-class discipline science and technology research project [2018YLTD07, 2018YLZDYJ11, 2019YLZDYJ09]
- Excellent Foreign Experts Project of Henan University
A novel polystyrene-supported ionic liquid was successfully synthesized and applied in catalyzing the cycloaddition of CO2 and epichlorohydrin, showing high activity and stability. Various analytical methods were used to elucidate the catalytic mechanism.
A novel polystyrene-supported ionic liquid (PS-IMPCOOHTMGBr) is synthesized and successfully applied to catalyze the cycloaddition of CO2 and epichlorohydrin (ECH). The 97.2% product yield is achieved at 80 degrees C under atmospheric pressure. The high activity is attributed to the ability of CO2 capture and multiple active centers of immobilized imidazolium ionic liquids. The catalytic activity is enhanced with the increasing amount of immobilized ionic liquids. Even after 9 runs, there is no obvious decrease for the catalytic activity of PSIMPCOOHTMGBr. To further elucidate the catalyst structure and its catalytic feature, the PS-IMPCOOHTMGBr is characterized by elemental analysis, thermal gravimetric analysis, infrared spectroscopy, scanning electron microscopes, solid state NMR, and Brunauer-Emmett-Teller analysis. Two possible reaction mechanisms are proposed according to the characterized results and reported literature. The ionic liquids supported on the PS would have the comparable catalytic activity with those immobilized on the porous materials by judicious choice of ionic liquids.
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