硅钨基咪唑离子液体催化剂的合成及脱硫性能研究  

Study on synthesis and desulfurization performance of silicon tungsten-based imidazolium ionic liquid catalysts

作　　者：贺建宏 郑长征[1] 丁涛[1] 郭杨昭 HE Jianhong;ZHENG Changzheng;DING Tao;GUO Yangzhao(School of Environmental and Chemical Engineering,Xi'an Polytechnic University,Xi'an 710600,China)

机构地区：[1]西安工程大学环境与化学工程学院

出　　处：《能源化工》2019年第6期36-41,共6页Energy Chemical Industry

基　　金：陕西省工业科技攻关项目(2016GY-171)

摘　　要：以碘化1-乙烯基-3-甲基咪唑与硅钨酸为原料,经沉淀反应制备了一种杂多酸盐催化剂,进而研发了一种氧化脱硫催化剂体系:杂多酸盐催化剂+DMF+30%(w)H2O2。采用红外光谱分析、X射线衍射、热重分析对杂多酸盐催化剂进行了物性表征,考察了反应温度、催化剂用量、催化剂质量浓度及氧化剂双氧水体积对脱硫效果的影响并对氧化脱硫反应进行了动力学研究。结果表明:在优化反应条件下,二苯并噻吩的脱除率为90.75%,对二苯并噻吩氧化脱硫反应为一级反应,表观活化能为28.894 kJ/mol。A heteropoly acid catalyst is prepared by precipitation reaction of 1-vinyl-3-methylimidazolium iodine and silicotungstic acid, and then a catalyst system for oxidative desulfurization is developed:heteropolyacid salts catalyst +DMF+30%(w)H2O2.The catalyst is characterized by FTIR,XRD,TG-DTG. The effects of reaction temperature, amount of catalyst, concentration of catalyst and volume of oxidant hydrogen peroxide on desulfurization are investigated, and the kinetics of desulfurization is studied. The results show that the removal rate of dibenzothiophene is 90.75%,and the oxidation desulfurization of dibenzothiophene is a first-order reaction, and the apparent activation energy is 28.894 kJ/mol.

关 键 词：硅钨杂多酸 离子液体 催化氧化脱硫 动力学 

分 类 号：TQ426[化学工程] TQ028􀆰