化工进展 ›› 2019, Vol. 38 ›› Issue (04): 1996-2002.DOI: 10.16085/j.issn.1000-6613.2018-1394

• 资源与环境化工 • 上一篇    下一篇

燃煤净烟气中共存杂质对膜法捕集CO2影响现状

杨林军1,2(),张琳2,3,孙莹2   

  1. 1. 江苏省煤基CO2捕集与地质封存重点实验室,江苏 徐州 221008
    2. 东南大学能源热转换及其过程测控教育部重点实验室,江苏 南京210096
    3. 光大环保技术研究院(南京)有限公司,江苏 南京 211000
  • 收稿日期:2018-07-06 修回日期:2018-10-17 出版日期:2019-04-05 发布日期:2019-04-05
  • 作者简介:<named-content content-type="corresp-name">杨林军</named-content>(1967—),男,教授,博士生导师,主要从事膜法捕集CO2研究。E-mail:<email>ylj@seu.edu.cn</email>。
  • 基金资助:
    江苏省煤基CO2捕集与地址储存重点实验室开放基金(2016A05);国家自然科学基金(51176034)

Present situation of the effect of coexistent impurities in coal fired flue gas on CO2 capture by membranes

Linjun YANG1,2(),Lin ZHANG2,3,Ying SUN2   

  1. 1. Key Laboratory of Coal-based CO2 Capture and Geological Storage,China University of Mining and Technology,Xuzhou 221008,Jiangsu,China
    2. Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education,Southeast University,Nanjing 210096,Jiangsu,China
    3. Everbright Environmental Technology Research Institute (Nanjing) Limited,Nanjing 211000,Jiangsu,China
  • Received:2018-07-06 Revised:2018-10-17 Online:2019-04-05 Published:2019-04-05

摘要:

膜法捕集CO2是现役燃煤电厂碳减排的重要手段之一,在实际应用中膜法捕集系统通常适合安装在湿法脱硫系统下游,鉴于脱硫净烟气中的颗粒物及气态污染物难以完全脱除,同时水汽接近饱和状态,气相中的共存杂质以及吸收液组分与膜及膜材料相互作用,会对膜法捕集CO2性能造成严重影响。本文综述了烟气中共存气态、颗粒物组分及液相吸收剂对膜分离、膜吸收宏观性能、膜微结构及材质的影响,以及燃煤脱硫净烟气环境下膜法捕集CO2长期运行性能及变化规律的研究现状,指出了抑制膜失效的技术方法,以期为突破膜法捕集CO2技术发展的瓶颈,实现膜的稳定高效运行提供参考。

关键词: 二氧化碳, 膜分离, 膜吸收, 共存杂质, 膜污染

Abstract:

Membrane CO2 capture is one of the important methods to reduce carbon emission in existing coal-fired power plants. In industrial application, the membrane capture system is usually suitable to be installed in the downstream of wet desulphurization system. However, it is difficult to remove all the fine particles and gaseous pollutants from the flue gas, and the water vapor is close to saturation. The co-existing impurities in the gas phase as well as the absorption liquid component have interaction with the membrane and membrane material, which will cause serious influence on the efficiency of membrane CO2 capture. The effects of co-existing gaseous, particulate and liquid phase absorbents on membrane separation, macroscopic properties of membrane absorption, membrane microstructures and materials were reviewed in this paper. Furthermore, the characteristic of membrane capture performance in a long term operation under the desulfurized flue gas conditions were summarized, and the technical methods to inhibit membrane failure were pointed out. It will provide a reference for breaking through the bottleneck of membrane technology for capturing CO2 and achieve stable and efficient operation of membrane.

Key words: carbon dioxide, membrane separation, membrane absorption, coexistent impurities, membrane fouling

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