有序介孔碳CMK-3负载离子液体催化CO_2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

作　　者：刘春艳[1] 肖本能 

机构地区：[1]辽宁师范大学化学化工学院,大连116029

出　　处：《应用化学》2014年第4期406-410,共5页Chinese Journal of Applied Chemistry

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%。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 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.

关 键 词：多相催化 CMK-3-IL 固载化 二氧化碳 环状碳酸酯 

分 类 号：O543[理学—物理]