有序介孔碳CMK-3负载离子液体催化CO2与环氧化物合成环状碳酸酯

doi:10.3724/SP.J.1095.2014.30305

摘要/Abstract

摘要： 采用有序介孔碳CMK-3为载体负载咪唑类离子液体制得CMK-3-IL催化剂，用X射线衍射(XRD)、透射电子显微镜(TEM)、N2吸附、热重分析和元素分析等手段表征了催化剂样品，并考察了CMK-3-IL催化剂催化CO2与环氧丙烷合成碳酸丙烯酯的反应性能。结果表明，离子液体被成功的负载到CMK-3载体上，CMK-3负载离子液体后孔道结构没有被破坏，但孔体积、孔径和比表面积均有所下降。催化实验表明，在120 ℃、2 MPa的条件下反应6 h，环氧丙烷转化率达到64%，碳酸丙烯酯选择性高达99%。

关键词: 多相催化, CMK-3-IL, 固载化, 二氧化碳, 环状碳酸酯

Abstract: CMK-3-IL heterogeneous catalysts were synthesized using ordered mesoporous carbons CMK-3 as the support to immobilize imidazoles ionic liquids and applied to the synthesis of cyclic carbonate. The catalyst samples were characterized by X-ray powder diffraction(XRD), nitrogen adsorption-desorption, transmission electron microscopy(TEM), thermogravimetric analysis(TGA) and elemental analysis. The results show that the ionic liquids are grafted on the surface of the CMK-3 and the resultant hybrid materials retains mesoporous structure after immobilization. The nitrogen adsorption results indicate that pore volume, pore diameter and surface area of CMK-3-IL are slightly reduced. CMK-3-IL shows much higher catalytic activity. A 64% conversion of propylene oxide and a 99% selectivity of propylene carbonate can be achieved when the catalytic reaction is carried out at 120 ℃ under 2 MPa for 6 h.

Key words: heterogeneous catalysis, CMK-3-IL, immobilization, carbon dioxide, cyclic carbonate

中图分类号:

O643

刘春艳, 肖本能. 有序介孔碳CMK-3负载离子液体催化CO₂与环氧化物合成环状碳酸酯[J]. 应用化学, DOI: 10.3724/SP.J.1095.2014.30305.

LIU Chunyan*, XIAO Benneng. Ordered Mesoporous Carbon CMK-3 Immobilized with Ionic Liquids as Efficient Catalysts for the Synthesis of Cyclic Carbonates from CO^₂ and Epoxides[J]. Chinese Journal of Applied Chemistry, DOI: 10.3724/SP.J.1095.2014.30305.

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有序介孔碳CMK-3负载离子液体催化CO₂与环氧化物合成环状碳酸酯

Ordered Mesoporous Carbon CMK-3 Immobilized with Ionic Liquids as Efficient Catalysts for the Synthesis of Cyclic Carbonates from CO^₂ and Epoxides

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