CIESC Journal ›› 2019, Vol. 70 ›› Issue (4): 1567-1574.DOI: 10.11949/j.issn.0438-1157.20181251

• Energy and environmental engineering • Previous Articles     Next Articles

Preparation of EMIES/nC9H10O2-based deep eutectic solvents and its oxidative desulfurization activity

Xinbo WANG(),Yanping ZHANG,Xiuping LI,Rongxiang ZHAO()   

  1. College of Chemistry, Chemical Engineering and Environmental Engineering, Liaoning Shihua University, Fushun 113001, Liaoning, China
  • Received:2018-10-22 Revised:2018-12-28 Online:2019-04-05 Published:2019-04-05
  • Contact: Rongxiang ZHAO

EMIES/nC9H10O2基低共熔溶剂的制备及其氧化脱硫活性的研究

王鑫博(),张延平,李秀萍,赵荣祥()   

  1. 辽宁石油化工大学化学化工与环境学部,辽宁 抚顺 113001
  • 通讯作者: 赵荣祥
  • 作者简介:<named-content content-type="corresp-name">王鑫博</named-content>(1993—),男,硕士研究生,<email>724581317@qq.com</email>|赵荣祥(1971—),男,博士,副教授,<email>zylhzrx@126.com</email>
  • 基金资助:
    辽宁省博士启动基金项目(201501105)

Abstract:

A series of acidic deep eutectic solvents (DESs) EMIES/nC9H10O2n=0.25, 0.5, 1, 2, 4) were synthesized by simply heating the mixture of 1-ethyl-3-methylimidazolium ethylsulfate (EMIES) and 3-phenylpropionic acid (C9H10O2). The structure of EMIES/nC9H10O2 was determined by FTIR, 1H NMR and TGA characterization. The extraction-oxidation desulfurization system was developed to remove sulfides from model oil using EMIES/nC9H10O2 as the extractant and catalyst, H2O2 as the oxidation. The influences of raw material ratio, reaction temperature, O/S ratio, amount of DESs and different sulfide on the desulfurization performance were investigated. The experimental results demonstrated the optimal reaction conditions were molar ratio of EMIES to C9H10O2 of 1∶1, temperature of 50℃, O/S ratio of 8, the amount of DESs of 1.5 g and 5 ml model oil. Removal rate of DBT, 4, 6-DMDBT and BT reached 94.8%, 91.6% and 46.4%, respectively, under the optimal condition. The DESs can be reused for 6 times without significant decrease in activity. In addition, the desulfurization mechanism of the oxidation-extraction desulfurization system was discussed.

Key words: solvent extraction, recovery, catalysis, deep eutectic solvents

摘要:

通过简单加热1-乙基-3-甲基咪唑硫酸乙酯(EMIES)离子液体和3-苯丙酸(C9H10O2)的混合物,制备了一系列酸性低共熔溶剂EMIES/nC9H10O2n=0.25,0.5,1,2,4)。通过FTIR,1H NMR和TGA的表征,确定EMIES/nC9H10O2的结构。以该低共熔溶剂为催化剂和萃取剂,H2O2为氧化剂,组成氧化-萃取脱硫体系,用于脱除模拟油中的硫化物。考察了原料配比、反应温度、氧硫比(O/S)、低共熔溶剂加入量和不同硫化物对脱硫性能的影响。结果表明,在EMIES和C9H10O2摩尔比为1∶1,反应温度为50℃,O/S比为8,低共熔溶剂加入量为1.5 g和模拟油5 ml的反应条件下,二苯并噻吩、4,6-二甲基二苯并噻吩和苯并噻吩的脱除率分别为94.8%、91.6%和46.4%。低共熔溶剂可循环使用6次,活性无明显下降。此外,对该氧化-萃取脱硫体系的脱硫机理进行了探讨。

关键词: 溶剂萃取, 回收, 催化剂, 低共熔溶剂

CLC Number: