化工进展2016，Vol.35Issue(8)：2553-2560,8.DOI:10.16085/j.issn.1000-6613.2016.08.40
萃取蒸馏脱除油品中硫的过程模拟与优化
Desulfurization of oil products by extractive distillation:simulation and optimization
摘要
Abstract
Automobile exhaust leads to serious pollution,a mixture of organic solvent and ionic liquid (IL)was proposed as the mixed extractant to produce clean gasoline whose sulfur content below 10μg/g. The composition and property of model gasoline neared real FCC gasoline during the simulation. The selectivity and solubility of 30 kinds of normal ILs to cyclohexane-thiophene system were calculated by COSMO-RS model,and [EMIM][BF4] might be the most suitable IL as entrainer withN-formylmorphol(NFM). Then simulation and optimization of extractive distillation process were carried out by Aspen Plus,which used NFM and [EMIM][BF4] as mixed extractant. The optimized results showed the extractant was composed of NFM(98wt%) and [EMIM][BF4](2wt%),reflux mass ratio was 0.4 for extractive distillation column,recovery ratio was 70% and the mass flow ratio of solvent to feed was 1. The method of extractive distillation could remove benzothiophene,thioether and thiophenes effectively,and the content of these sulfides could be decreased from 1581μg/g to 5.37μg/g in model gasoline,desulfurization efficiency was 98.1%,the distillate could reach up to mass yield 70% and volume yield 75%. Moreover,the prediction accuracy of COSMO-RS model in thermodynamics of IL,UNIFAC model in vapor-liquid equilibrium of organic sulfur compounds -hydrocarbon system and the reliability of simulation process were tested by comparing calculated value and experimental value in literature.关键词
萃取蒸馏/离子液体/脱硫/模拟/优化Key words
extractive distillation/ionic liquids/desulfurization/simulation/optimization分类
能源科技引用本文复制引用
张清珍,代成娜,韩敬莉,雷志刚..萃取蒸馏脱除油品中硫的过程模拟与优化[J].化工进展,2016,35(8):2553-2560,8.基金项目
国家自然科学基金项目（21476009，21406007，U1462104）。 （）
