高等学校化学学报 ›› 2013, Vol. 34 ›› Issue (4): 906.doi: 10.7503/cjcu20120881

• 物理化学 • 上一篇    下一篇

热致相分离聚偏氟乙烯膜接触器法高压吸收CO2 过程及数学模拟

华从贵1,2, 康国栋1, 贾静璇1,2, 李萌1, 曹义鸣1, 袁权1   

  1. 1. 中国科学院大连化学物理研究所, 国家洁净能源实验室, 大连 116023;
    2. 中国科学院研究生院, 北京 100049
  • 收稿日期:2012-09-25 出版日期:2013-04-10 发布日期:2013-01-31
  • 通讯作者: 曹义鸣,男,博士,研究员,博士生导师,主要从事膜技术研究.E-mail:ymcao@dicp.ac.cn E-mail:ymcao@dicp.ac.cn
  • 基金资助:

    辽宁省自然科学基金(批准号:201204481);国家"九七三"计划项目(批准号:2009CB623405)和国家"八六三"计划项目(批准号:2012AA03A611)资助.

Physical Absorption of CO2 Using Polyvinylidene Fluoride Membrane Contactor at High Pressure and Mathematical Simulation

HUA Cong-Gui1,2, KANG Guo-Dong1, JIA Jing-Xuan1,2, LI Meng1, CAO Yi-Ming1, YUAN Quan1   

  1. 1. Chinese Academy of Sciences, Dalian Institute of Chemical Physicals, National Laboratory for Clean Energy, Dalian 116023, China;
    2. Graduate University of Chinese Academy of Science, Beijing 100049, China
  • Received:2012-09-25 Online:2013-04-10 Published:2013-01-31

摘要:

研究了膜接触器法高压吸收混合气中CO2的过程, 考察水作为吸收剂时, 操作压力、 气体和吸收剂流量对聚偏氟乙烯(PVDF)中空纤维膜脱除CO2效果的影响. 通过物理传质模型得出气相、 膜相和液相的传质方程式, 构建了二维数学模型, 并结合边界层条件和多物理场耦合分析软件(COMSOL MULTIPHYSICS)对膜接触器法高压物理吸收CO2的过程进行了模拟预测. 结果表明, 吸收过程中膜的润湿情况显著影响CO2传质效果; 在数学模型中引入润湿率, 可以较准确预测CO2的物理吸收效果.

关键词: 中空纤维膜接触器, 高压, 物理吸收, CO2, 数学模型

Abstract:

The removal of CO2 from natural gas using polyvinylidene fluoride(PVDF) hollow fiber membrane contactor was studied at high pressure. The distilled water was used as absorbent. The effects of operating pressure, inlet gas flow rate and liquid flow rate on removal efficiency of CO2 were investigated. Based on the physical mass transfer process, the mass transfer equation of gas phase, membrane phase and liquid phase were established. The outlet CO2 content could be predicted using Multiphysics(COMSOL) combined with 2-D mathematical model and corresponding boundary conditions. The results showed that the removal efficiency of CO2 was affected significantly by the partial wetting of membrane. The predicted results were in good agreement with the experimental data if the wetting ratio of membrane was considered in the mathematical model.

Key words: Hollow fiber membrane contactor, High pressure, Physical absorption, CO2, Mathematical model

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