Journal
JOURNAL OF CO2 UTILIZATION
Volume 3-4, Issue -, Pages 7-13Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jcou.2013.08.002
Keywords
Carbon dioxide; Epoxide; Cyclic carbonate; Functional ionic liquid; Polydivinylbenzene polymer
Funding
- National Natural Science Foundation of China [51104089, 51238002, 51272099]
- Jiangxi Province Science and Technology Project [2010AIB00400]
- Jiangxi Province Science and Technology Support Program [20111BBG70003-4]
- Natural Science Foundation of Jiangxi Province [20122BAB213013]
- NCHKU
- HNU
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A series of cross-linked polydivinylbenzene polymers covalently grafted with various (hydroxyl, carboxyl, and amino) functional ionic liquid were fabricated by a simple method and evaluated as heterogeneous catalysts for the synthesis of cyclic carbonates from CO2 and epoxides. The as-fabricated catalysts show good performance across a wide range of epoxides in the absence of solvent and cocatalyst, especially the one that was grafted with hydroxyl ionic liquid. The effects of functional groups in ionic liquid, reaction temperature, initial CO2 pressure, and reaction time on the cycloaddition reaction were investigated. It is suggested that synergetic effect between functional groups and bromide ions facilitates the catalytic reaction. It is noted that the hydroxyl group with moderate hydrogen bonding is more crucial for the cycloaddition reaction than the other groups. In addition, the recycling test showed that the catalyst could be reused for as many as six times without any loss of catalytic activity. (C) 2013 Elsevier Ltd. All rights reserved.
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