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首页> 外文期刊>RSC Advances >Numerical investigation of the effects of polypropylene hollow fibre membrane structure on the performance of CO2 removal from flue gas
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Numerical investigation of the effects of polypropylene hollow fibre membrane structure on the performance of CO2 removal from flue gas

机译：聚丙烯中空纤维膜结构对烟气二氧化碳去除性能的数值研究

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摘要

Carbon dioxide (CO2) absorption from flue gas by hollow fibre membrane contactors is considered as a clean, highly efficient and promising decarburisation technique. Herein, a two-dimensional mathematical model is developed for CO2 absorption from parallel countercurrent mixed gas by a hollow fibre membrane contactor. Using the finite element method, the fibre membrane structure effect on CO2 removal efficiency and mass transfer performance were simulated, including the inner diameter, wall thickness, length, packing density, porosity and tortuosity factor. Three absorbents were chosen: EEA (ethyl-ethanolamine), EDA (ethylenediamine) and PZ (piperazine). The axial and radial diffusion in the membrane contactor, diffusion in the fibre and membrane pores and non-wetting conditions were considered. The simulation results showed that the CO2 removal efficiency and mass transfer rate were reduced with increasing wall thickness, inner diameter and tortuosity factor, and the performance was enhanced with increasing length, packing density and porosity. However, the effects of porosity and tortuosity factor were weak; thus, it was very favourable for making the module. The CO2 removal performance was excellent for a wall thickness in the range of 30-50 mu m, an inner diameter of 90-110 mu m, a length greater than 150 mm, and a packing density of 21-25% of the membrane structure.
机译：通过中空纤维膜接触器从烟道气吸收的二氧化碳（CO2）被认为是一种清洁，高效且有前途的脱碳技术。这里，通过中空纤维膜接触器开发用于从平行逆流混合气体的CO 2吸收的二维数学模型。采用有限元法，模拟了对二氧化碳去除效率和传质性能的纤维膜结构效应，包括内径，壁厚，长度，包装密度，孔隙率和曲折因子。选择了三种吸收剂：EEA（乙醇胺），EDA（乙二胺）和PZ（哌嗪）。考虑了膜接触器中的轴向和径向扩散，纤维和膜孔中的扩散和非润湿条件。仿真结果表明，随着壁厚，内径和曲折因子的增加，增加了CO 2去除效率和传质速率，并且随着长度，包装密度和孔隙率的增加而增强了性能。然而，孔隙率和曲折因子的影响弱;因此，制造模块非常有利。壁厚的CO 2去除性能优异，在30-50μm，内径为90-110μm，长度大于150mm，夹持密度为21-25％的膜结构。

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  • 来源
    《RSC Advances》 |2015年第1期|共10页
  • 作者

    Zhang Li; Qu Zi-Yi; Yan Yun-Fei; Ju Shun-Xiang; Zhang Zhi-En;

  • 作者单位

    Chongqing Univ Coll Power Engn Chongqing 400030 Peoples R China;

    Chongqing Univ Coll Power Engn Chongqing 400030 Peoples R China;

    Chongqing Univ Coll Power Engn Chongqing 400030 Peoples R China;

    China United Engn Corp Hangzhou 310052 Zhejiang Peoples R China;

    Chongqing Univ Coll Power Engn Chongqing 400030 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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