Journal
RSC ADVANCES
Volume 8, Issue 47, Pages 26554-26562Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8ra03952f
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Funding
- National Natural Science Foundation of China [21706163]
- Liaoning province Department of Education Foundation [LQGD2017020]
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In this study, functionalized composite catalysts, namely, ILs (ILX/(ZnBr2)(2)), with hydroxyl, carboxyl and amino groups immobilized on a molecular sieve (MCM-22) support were synthesized with the help of a silane coupling agent, 3-chloropropyltriethoxysilane (CPTES). Cycloaddition of CO2 and propylene oxide (PO) was carried out in a fixed bed reactor. The results show that MCM-22-CPTES-[AeMIM] [Zn2Br5] demonstrates the best catalytic properties for this reaction. A high selectivity and yield of propylene carbonate (PC) could be reached at 130 degrees C under a CO2 pressure of 2.0 MPa, with a LHSV of 0.75 h(-1) and a molar ratio of CO2/PO of 3 : 1. The yield stabilized at 61.6% after 50 h in the fixed bed reactor.
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