离子液体用于燃油萃取脱硫的选择与过程优化

发布时间：2018-03-20 08:01

  本文选题：离子液体　切入点：萃取　出处：《化工学报》2017年09期 　论文类型：期刊论文

【摘要】：针对基于COSMO-SAC模型分子设计方法的准确性问题,采用离子液体脱硫机理分析和实验的方法对其进行了验证,即对[HMIM][BF_4]、[HMIM][PF_6]、[BMIM][BF_4]、[BMIM][PF_6]、[EMIM][BF_4]、[EMIM][PF_6]6种离子液体作萃取剂时的脱硫效果进行了脱硫机理的分析和实验的验证,得到的脱硫性能排序与离子液体分子设计结果基本一致,且均认为[HMIM][PF_6]脱硫率较高。以[HMIM][PF_6]为萃取剂,通过液相色谱法测定萃取后的液相组成,考察萃取时间、萃取温度、剂油比3个因素对脱硫率、分配系数和选择性系数的影响。通过正交实验设计确定了萃取时间40 min、萃取温度20℃、剂油比2:1为较优操作条件,单次脱硫率为72.74%,四级萃取可将模型油的含硫量由1200μg·g~(-1)降至6.98μg·g~(-1),符合国Ⅴ标准。
[Abstract]:Aiming at the accuracy of molecular design method based on COSMO-SAC model, the mechanism analysis and experimental method of ionic liquid desulfurization were used to verify it. That is, the desulfurization mechanism of [HMIM] [BF_4], [HMIM] [PF_6], [BMIM] [BF_4], [BMIM] [PF_6], [EMIM] [BF_4], [EMIM] [PF_6] six ionic liquids as extractant has been analyzed and verified by experiments. It is considered that [HMIM] [PF_6] desulfurization rate is higher. [HMIM] [PF_6] was used as extractant to determine the composition of liquid phase after extraction by liquid chromatography, and the extraction time, extraction temperature and ratio of solvent to oil were investigated to determine the desulphurization rate. The optimum operating conditions were determined by orthogonal design: extraction time 40 min, extraction temperature 20 鈩，

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