Chemical Industry and Engineering Progress ›› 2019, Vol. 38 ›› Issue (08): 3866-3873.DOI: 10.16085/j.issn.1000-6613.2018-2430

• Resources and environmental engineering • Previous Articles     Next Articles

Review on membrane wettability of membrane CO2 absorption method from coal-fired flue gas

Weifeng ZHANG(),Juan LI,Qiuhua WANG,Zhaoxiong DENG,Lulu WANG   

  1. School of Civil Engineering and Architecture,East China Jiaotong University, Nanchang 330013, Jiangxi, China
  • Received:2018-12-18 Online:2019-08-05 Published:2019-08-05
  • Contact: Weifeng ZHANG

燃煤烟气中CO2膜吸收分离技术的膜浸润特性述评

张卫风(),李娟,王秋华,邓兆雄,王璐璐   

  1. 华东交通大学土木建筑学院,江西 南昌330013
  • 通讯作者: 张卫风
  • 作者简介:张卫风(1977—),男,博士,副教授,研究方向为大气污染及其控制、温室气体CO2减排。E-mail:wfzhang2002@126.com
  • 基金资助:
    国家重点研发计划(2016YFC0209300)

Abstract:

Membrane absorption method was one of the main processes for separating CO2 from coal-fired flue gas. The increase of membrane resistance caused by membrane wetting and the change of membrane surface morphology were the main problems encountered in membrane absorption research, which hindered the wide application of membrane absorption method. Based on the basic principles of membrane absorption, the factors affecting membrane wetting (type of absorbent, concentration of absorbent, temperature, liquid phase pressure and flow rate) and membrane properties (membrane material and membrane structure) were described. The compatibility between membrane and absorbent was analyzed in detail. It was determined that pore wettability was the key factor restricting the long-term stable operation of membrane module. Finally, it was pointed out the main research direction for mitigating membrane wetting in the future as follows: optimizing operating conditions, developing new cost-effective absorbents, membrane materials and surface modification to improve the compatibility of membrane and absorbent, improving the stability of long-term operation of membrane contactors, and further exploring how to restore the performance of membrane components, so as to improve the reusability rate.

Key words: coal-fired flue gas, membrane absorption, membrane wetting, membrane properties, stability

摘要:

膜吸收法是分离燃煤烟气CO2的主要工艺之一,膜润湿造成的膜阻力增加以及膜表面形态改变是膜吸收法研究中遇到的主要问题,阻碍了膜吸收法的广泛应用。本文在膜吸收法的基本原理基础上,阐述了影响膜润湿的因素(吸收剂种类、吸收液浓度、温度、液相压力和流速)以及膜特性因素(膜材料和膜结构)的最新进展,详细分析了膜与吸收剂之间的兼容关系,确定孔润湿是制约膜组件长期稳定运行的关键因素。最后提出了未来缓解膜润湿方面的主要研究方向:优化操作条件、开发新型性价比高的吸收剂和膜材料以及通过进行膜的表面改性等手段来改善膜和吸收剂的兼容性,提高膜接触器长时间运行的稳定性以及进一步细致探究如何恢复膜组件的性能,从而提高重复利用率。

关键词: 燃煤烟气, 膜吸收, 膜润湿, 膜特性因素, 稳定性

CLC Number: 

京ICP备12046843号-2;京公网安备 11010102001994号
Copyright © Chemical Industry and Engineering Progress, All Rights Reserved.
E-mail: hgjz@cip.com.cn
Powered by Beijing Magtech Co. Ltd