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过程工程学报 ›› 2018, Vol. 18 ›› Issue (1): 82-87.DOI: 10.12034/j.issn.1009-606X.217196

• 反应与分离 • 上一篇    下一篇

[Bmim][PF6]高效吸收二氯甲烷及流程模拟

王斌琦1,2, 张香平2, 尚大伟2, 冯建朋2, 吴 慧2, 张彦春3, 李建伟1*   

  1. 1. 北京化工大学化工资源有效利用国家重点实验室,北京 100029;2. 中国科学院过程工程研究所离子液体与绿色工程研究部,北京 100190; 3. 北京京杭信创环境科技有限公司,北京 102208
  • 收稿日期:2017-03-27 修回日期:2017-06-04 出版日期:2018-02-22 发布日期:2018-01-29
  • 通讯作者: 李建伟
  • 基金资助:
    国家杰出青年科学基金;国家重点基础研究发展计划项目

Efficient Recovery of Dichloromethane by [Bmim][PF6] and Process Simulation

Binqi WANG1,2,  Xiangping ZHANG2,  Dawei SHANG2,  Jianpeng FENG2,  Hui WU2,  Yanchun ZHANG3,  Jianwei LI1*   

  1. 1. State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China; 2. Key Laboratory of Ionic Liquids Clean Process, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China; 3. Beijing Jinghangxinchuang Environmental Science Co., Ltd., Beijing 102208, China
  • Received:2017-03-27 Revised:2017-06-04 Online:2018-02-22 Published:2018-01-29

摘要: 采用智能重量吸附仪测量了不同温度、压力下二氯甲烷(CH2Cl2)在离子液体1-丁基-3-甲基咪唑六氟磷酸盐([Bmim][PF6])中的溶解度,用NRTL方程建立了离子液体?二氯甲烷体系的气液平衡模型,拟合得到二元交互作用参数,计算所得的二氯甲烷溶解度与实验数据吻合良好,平均相对误差为3.16%. 构建了离子液体处理含二氯甲烷尾气及资源回收利用的常压吸收?减压闪蒸解吸工艺和模型,模型适用范围为温度278.15~308.15 K,压力0~0.1 MPa. 对吸收塔进行了模拟和灵敏度分析,获得了常温常压吸收条件下的最佳操作工艺参数.

关键词: 离子液体, 二氯甲烷, 常压吸收-减压闪蒸解吸, 流程模拟

Abstract: The solubility of dichloromethane (CH2Cl2) in ionic liquid (IL) 1-butyl-3-methylimidazolium hexafluorophosphate ([Bmim][PF6]) at different temperatures and pressures was measured by intelligent gravimetric adsorption instrument. The NRTL equation was applied to describe the vapor?liquid equilibrium of IL?CH2Cl2 system and the thermodynamic interaction parameters were regressed with experimental data. The calculated properties agreed well with experimental data, and the average relative deviation was 3.16%. Based on the results, the absorption and recovery process model of waste gas containing dichloromethane by ionic liquid solvent was established, the applicable range of the model were temperature of 278.15~308.15 K and pressure of 0~0.1 MPa, while the absorption at normal pressure and vacuum flashing for the recovery of CH2Cl2 was proposed. The operating parameters of the absorption tower were analyzed by simulation method, which provided which provided the optimum data at normal temperature and pressure.

Key words: ionic liquid, CH2Cl2, absorption-desorption, process simulation