Selection and process optimization of ionic liquids for desulfurization

被引：0
作者：
Fang J. [1 ]
Zhang S. [1 ]
Li T. [1 ]
Li C. [1 ]
机构：
[1] School of Chemical Engineering, Hebei University of Technology, Tianjin
来源：
Li, Chunli (ctstfj@163.com) | 1600年 / Materials China卷 / 68期
关键词：
Desulfurization; Extraction; Ionic liquids; Orthogonal experiment; Simulation;
D O I：
10.11949/j.issn.0438-1157.20170182
中图分类号：
学科分类号：
摘要：
To verify the reliability of ionic liquids' molecular design method based on COSMO-SAC model, ionic liquids desulfurization mechanism analysis and experimental results are compared with COSMO simulation. By analyzing [HMIM][BF4], [HMIM][PF6], [BMIM][BF4], [BMIM][PF6], [EMIM][BF4] and [EMIM][PF6] on mechanism level, [HMIM][PF6] was considered as a better extractive desulfurization agent than others, and the order of desulfurization efficiency was consistent with the calculation results from COSMO-SAC model. The experimental result shows that the difference between the COSMO simulation and experiments is not significant. In this study, [HMIM][PF6] was used as an extractive desulfurization agent to remove benzothiophene from fuels, and the change of sulfur content in model oil was determined by liquid chromatography. Through considering the effect of extraction temperature, time and the ratio of solvent to oil, the optimal operating conditions, 20℃, 40 min and 2:1 respectively, were determined in orthogonal experiment with an efficiency over 72.74%. With [HMIM][PF6] used as the deep extraction desulfurization solvent, the sulfur content decreased from 1200 μg·g-1 to 6.98 μg·g-1 by 4-stages extraction, which met the Phase V Emission Standards in China. © All Right Reserved.
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页码：3434 / 3441
页数：7
相关论文
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