Chemical Industry and Engineering Progree ›› 2015, Vol. 34 ›› Issue (02): 402-406,412.DOI: 10.16085/j.issn.1000-6613.2015.02.016

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Synthesis of glycerol carbonate from glycerol and CO2 by supported KI catalysts

WANG Fuli1, HUANG Shiyong1, YU Qingyun2, HUANG Mei1, SUN Guosong1   

  1. 1. Guangxi Research Institute of Chemical Industry, Nanning 530006, Guangxi, China;
    2. School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, Guangxi, China
  • Received:2014-05-16 Revised:2014-09-21 Online:2015-02-05 Published:2015-02-05

负载型KI催化甘油与CO2合成甘油碳酸酯

王富丽1, 黄世勇1, 余青云2, 黄媚1, 孙果宋1   

  1. 1. 广西壮族自治区化工研究院, 广西 南宁 530006;
    2. 广西大学化学化工学院, 广西 南宁 530004
  • 通讯作者: 黄世勇,博士,高级工程师。E-mail:shiyonghuang@163.com
  • 作者简介:王富丽(1976-),女,硕士,工程师,研究方向为绿色化学
  • 基金资助:
    广西自然科学基金项目(2011GXNSFA018053)

Abstract: Different components were chosen to modify alumina and then KI was loaded on the surface of modified alumina,and a series of supported KI catalysts were prepared,such as KI/Al2O3-MgO,KI/Al2O3-ZnO,KI/Al2O3-TiO2 and KI/Al2O3-ZrO2. The catalytic activities were evaluated by the reaction of CO2,propylene epoxide and glycerol to synthesize glycerol carbonate and KI/Al2O3-MgO was found to be the best one. Through CO2-TPD of diffirent supports,it could be found that a few basic positions on the surface of supports were favorable to the reaction. The catalytic activity and stability of KI/Al2O3-MgO with different loading amounts were investigated and the optimal loading amount of KI was 1.5mmol/g. At the same time,KI/Al2O3-MgO was characterized by N2 adsorption/desorption (BET) and X ray diffraction (XRD). Overfull loading amount could lead to agglomeration of KI crystals and blockage of support pores. Reaction conditions were optimized. Under the optimal conditions (propylene oxide 0.3mol,glycerol 0.1mol,reaction temperature 130℃,reaction time 2h,and reaction pressure 6.0MPa),conversion of glycerol was 65.5% and yield of glycerol carbonate was 60.8%.

Key words: glycerol, carbon dioxide, catalysis, glycerol carbonate, multiphase reaction

摘要: 添加不同组分对氧化铝载体进行调变改性,再以改性氧化铝为载体,负载KI制备了一系列负载型催化剂KI/Al2O3-MgO、KI/Al2O3-ZnO、KI/Al2O3-TiO2和KI/Al2O3-ZrO2,并通过CO2、环氧丙烷和甘油合成甘油碳酸酯反应评价其催化活性,发现KI/Al2O3-MgO具有最高的活性。由不同载体的CO2-TPD分析可以发现,载体表面少量碱性位的存在有利于反应进行。实验研究了不同负载量KI/Al2O3-MgO的活性及稳定性,发现KI负载量为1.5mmol/g较为适宜。同时,实验又通过N2吸附/脱附(BET)、X射线衍射(XRD)等手段对不同负载量的KI/Al2O3-MgO进行了表征,进一步说明了负载量过多会导致KI晶粒团聚,并阻塞载体孔道。优化了反应条件,在最佳条件下(环氧丙烷0.3mol,甘油0.1mol,反应温度130℃,反应时间2h,反应压力6.0MPa),甘油的转化率为65.5%,甘油碳酸酯的产率为60.8%。

关键词: 甘油, 二氧化碳, 催化, 甘油碳酸酯, 多相反应

CLC Number: 

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