期刊
APPLIED CATALYSIS A-GENERAL
卷 464, 期 -, 页码 357-363出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apcata.2013.06.016
关键词
Dimethyl carbonate; Ethylene carbonate; Transesterification; Ionic liquid; Mesocellular silica foam
资金
- National Natural Science Foundation of China [21203014]
- CNPC Innovation Foundation [2011D-5006-0508]
- Open Foundation of Jiangsu Key Laboratory of Fine Petrochemical Engineering [KF1201]
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology [BM2012110]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
Functionalized basic ionic liquid, 1-(triethoxysilyl) propyl-3-methylimidazolium hydroxide ([SmIm]OH) was immobilized on the mesocellular silica foams (MCF) material and then applied in the catalytic synthesis of dimethyl carbonate (DMC) via transesterification of ethylene carbonate (EC) with methanol (MeOH). Combined characterization results of FT-IR, Si-29 NMR, N-2 adsorption-desorption, and TEM suggest that [SmIm]OH has been successfully grafted on the MCF material, and the three-dimensional mesoporosity with large pore size (similar to 34 nm) of MCF has been well retained during the immobilization procedure. The influences of reaction temperature, time, and the molar ratio of MeOH/EC have also been investigated in detail. The catalytic tests demonstrated that MCF-[SmIm]OH could catalyze the transesterification of EC and MeOH with high efficiency, allowing a stable and high DMC yield as much as 83% under mild reaction conditions, superior to those results of the heterogeneous catalysts reported previously. (C) 2013 Elsevier B.V. All rights reserved.
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