摘要
以十六胺为模板剂,采用水热合成法制备了一系列不同铜负载量的Cu-HMS催化剂,并考察了其对草酸二甲酯加氢制乙二醇反应的催化性能.同时,通过X射线粉末衍射(XRD)、N_2低温吸附脱附、红外光谱(FI-IR)、H_2程序升温还原(H_2-TPR)及透射电镜(TEM)等手段对催化剂进行了系统表征.结果表明,铜负载量对催化剂活性组分的分散性和载体之间的相互作用力影响很大.实验结果表明,以20%铜负载量制备的Cu-HMS催化剂催化性能优势明显.在反应温度为205℃、压力为2.0 MPa、氢酯比为80 mol/mol及液时空速为0.4 h-1的条件下,草酸二甲酯的转化率接近100%,乙二醇的选择性高达98.11%.
A series of Cu-HMS catalysts with different copper loadings were prepared by hydrothermal synthesis method using hexadecylamine as template, the catalytic performance of the Cu-HMS catalyst for the hydrogenation of dimethyl oxalate to ethylene glycol was investigated. At the same time, the catalysts were systematically characterized by X-ray diffraction （XRD）, N2 cryogenic adsorption and desorption, fourier transform infrared spectroscopy （FT-IR）, H2 temperature program reduction （H2-TPR） and transmission electron microscopy （TEM） and other means. The results show that copper loading has a great influence on the dispersibility of active components and the interaction force between supports. The experimental results show that the catalytic performance of Cu-HMS catalyst prepared at 20% copper loading is obvious advantages. At the reaction temperature of 205℃, the pressure of 2.0 MPa, the molar ratio of hydrogen to ester of 80 mol/mol and the liquid hourly space velocity of 0.4 h-1. The conversion of dimethyl oxalate was close to 100% and the selectivity to ethylene glycol was up to 98.11%.
出处
《分子催化》
EI
CAS
CSCD
北大核心
2018年第1期1-7,共7页
Journal of Molecular Catalysis(China)
