CIESC Journal ›› 2016, Vol. 67 ›› Issue (9): 3972-3980.DOI: 10.11949/j.issn.0438-1157.20160330

Previous Articles     Next Articles

Preparation of methylimidazole hydrochloride/oxalic acid type deep eutectic solvent and its application in oxidative desulfurization of model oil

HOU Liangpei1, ZHAO Rongxiang1, LI Xiuping2, SHI Weiwei1   

  1. 1 College of Petrochemical Engineering, Liaoning University of Petroleum & Chemical Technology, Fushun 113001, Liaoning, China;
    2 College of Chemistry & Material Science Engineering, Liaoning University of Petroleum & Chemical Technology, Fushun 113001, Liaoning, China
  • Received:2016-03-23 Revised:2016-05-03 Online:2016-09-05 Published:2016-09-05

甲基咪唑盐酸盐/草酸型低共熔溶剂的制备及其在模拟油中氧化脱硫中的应用

侯良培1, 赵荣祥1, 李秀萍2, 石薇薇1   

  1. 1 辽宁石油化工大学化学化工与环境学部石油化工学院, 辽宁 抚顺 113001;
    2 辽宁石油化工大学化学化工与环境学部化学与材料科学学院, 辽宁 抚顺 113001
  • 通讯作者: 赵荣祥

Abstract:

Methylimidazole hydrochloride/oxalic acid ([HMIM]Cl/H2C2O4) type deep eutectic solvent was synthesized by a simple heating and stirring mixture of methyl imidazole hydrochloride and oxalic acid. The removal of dibenzothiophene (DBT) in model oil was carried out by using[HMIM]Cl/H2C2O4 as a catalyst and hydrogen peroxide as oxidant. The effect of different reaction parameters such as different desulfurization system, reaction temperature, catalyst amount, molar ratio of hydrogen peroxide to sulfur and the type of sulfur-containing compounds in oil on the desulfurization rate was investigated. The experimental results indicated that the removal rate of DBT can reach 92.2% under the optimum conditions of 5 ml model oil, 1.25 ml of[HMIM]Cl/H2C2O4 and O/S mole ratio of 12 in 140 min and 40℃. The kinetics analysis showed that the oxidative desulfurization system was in accord with the first order reaction kinetics equation. The catalyst was reused for 7 times without significant decrease in activity.

Key words: methylimidazole hydrochloride, [HMIM]Cl/H2C2O4, catalysts, deep eutectic solvent, oxidation, reaction kinetics

摘要:

通过简单加热并搅拌甲基咪唑盐酸盐和草酸的混合物合成了甲基咪唑盐酸盐/草酸([HMIM]Cl/H2C2O4)型酸性低共熔溶剂,以[HMIM]Cl/H2C2O4为萃取剂和催化剂、H2O2为氧化剂催化氧化法脱除模拟油中的二苯并噻吩,考察不同的脱硫体系、反应温度、催化剂加入量、氧硫比、模拟油中含硫化合物类型对脱硫率的影响。实验表明,在反应温度为40℃、模拟油量为5 ml、[HMIM]Cl/H2C2O4加入量为1.25 ml、O/S 12、反应时间为140 min的最佳反应条件下二苯并噻吩的脱除率可以达到92.2%。动力学分析表明,该氧化脱硫体系符合一级反应动力学方程。循环使用7次后催化剂的活性没有明显降低。

关键词: 甲基咪唑盐酸盐, [HMIM]Cl/H2C2O4, 催化剂, 低共熔溶剂, 氧化, 反应动力学

CLC Number: