新型生物炭基催化剂催化甘油合成碳酸甘油酯  

Biochar supported catalyst for transesterification reaction of glycerol to glycerol carbonate

作　　者：赵丹丹[1] 王舒笑 单锐[1] 罗光前[1,2,3,4] Zhao Dandan;Wang Shuxiao;Shan Rui;Luo Guangqian(Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China;a School of Energy and Power Engineering, b State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, China;Shenzhen Institute of Huazhong University of Science and Technology, Shenzhen 518000, Guangdong China)

机构地区：[1]中国科学院广州能源研究所,广东广州510640 [2]华中科技大学能源与动力工程学院,湖北武汉430074 [3]华中科技大学煤燃烧国家重点实验室,湖北武汉430074 [4]深圳华中科技大学研究院,广东深圳518000

出　　处：《华中科技大学学报（自然科学版）》2018年第4期121-126,共6页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(51776211,51676194);广东省产学研合作资助项目(2015B090904009);中国科学院科研装备研制资助项目(YZ201516);广东省科技计划资助项目(2017A010104008);深圳市科技计划资助项目(JCYJ20160506170136345)

摘　　要：以固体废弃物核桃壳生物炭为原料,制备了一系列廉价、高效的固体碱复合催化剂,并应用于甘油和碳酸二甲酯的酯交换反应试验.催化剂通过扫描电子显微镜、X射线能谱、X射线衍射、N2吸脱附、傅里叶变换红外光谱及Hammett指示法进行表征;同时对催化剂的制备条件、催化反应条件及重复利用进行了分析.试验结果表明：催化剂30K/WB-600展示了最优的催化活性,当反应中催化剂的质量分数为5%、碳酸二甲酯/甘油摩尔比为4：1、反应时间为90 min、反应温度为80℃时,甘油的转换率达到98.3%,甘油碳酸酯的产率达到94.6%;经过5次循环利用后甘油转换率为94.2%,甘油碳酸酯产率为85.2%;催化剂的失活主要是由于少量K离子的流失.The walnut shell was utilized as the raw material for the preparation of cost-effective and high-efficiency solid base catalysts for the transesterification reaction of glycerol with dimethyl carbonate.The chemical and structural properties of catalysts were examined by scanning electron microscope（SEM）,energy dispersive spectrometer（EDS）, X-ray diffraction（XRD）, N2 adsorption/desorption,Fourier-transform infrared spectroscopy（FTIR） and the Hammett indicator method.In addition,the effects of catalyst preparation conditions,reaction conditions and the catalyst reusability were studied.Experiment results show that the best performance is observed for the resulting 30 K/WB-600 catalyst,with the catalyst mass fraction of 5%,DMC/glycerol molar ratio of 4：1,reaction time of 90 min and reaction temperature of 80 ℃,the conversion of glycerol and yield of GC attain 98.3% and 94.6%,respectively.After 5 repeated uses,the conversion of glycerol and yield of GC were 94.2% and 89.8%,respectively. The deactivation of catalyst is mainly due to the leaching of K＋ ions.

关 键 词：生物炭 核桃壳 碳酸钾 碳酸甘油酯 催化剂 

分 类 号：X820.3[环境科学与工程—环境工程]