Computational Fluid Dynamics Analysis of a Hollow Fiber Membrane Module for Binary Gas Mixture

IF 2.7 4区 环境科学与生态学 Q3 ENERGY & FUELS Greenhouse Gases: Science and Technology Pub Date : 2023-05-22 DOI:10.3390/gases3020005
Salman Qadir, M. Ahsan, A. Hussain
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引用次数: 1

Abstract

The membrane gas separation process has gained significant attention using the computational fluid dynamics (CFD) technique. This study considered the CFD method to find gas concentration profiles in a hollow fiber membrane (HFM) module to separate the binary gas mixture. The membrane was considered with a fiber thickness where each component’s mass fluxes could be obtained based on the local partial pressures, solubility, diffusion, and the membrane’s selectivity. COMSOL Multiphysics was used to solve the numerical solution at corresponding operating conditions and results were compared to experimental data. The two different mixtures, CO2/CH4 and N2/O2, were investigated to obtain concentration gradient and mass flux profiles of CO2 and O2 species in an axial direction. This study allows assessing the feed pressure’s impact on the HFM system’s overall performance. These results demonstrate that the increment in feed pressures decreased the membrane system’s separation performance. The impact of hollow fiber length indicates that increasing the active fiber length has a higher effective mass transfer region but dilutes the permeate-side purities of O2 (46% to 28%) and CO2 (93% to 73%). The results show that increasing inlet pressure and a higher concentration gradient resulted in higher flux through the membrane.
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二元气体混合中空纤维膜模块的计算流体动力学分析
利用计算流体力学(CFD)技术研究膜气体分离过程已引起广泛关注。本研究采用CFD方法在中空纤维膜(HFM)模块中寻找气体浓度分布,以分离二元气体混合物。膜被认为具有纤维厚度,其中每个组分的质量通量可以根据局部分压、溶解度、扩散和膜的选择性得到。利用COMSOL Multiphysics对相应工况下的数值解进行了求解,并与实验数据进行了比较。研究了CO2/CH4和N2/O2两种不同混合物,得到了CO2和O2在轴向上的浓度梯度和质量通量分布。该研究允许评估进料压力对HFM系统整体性能的影响。结果表明,进料压力的增加降低了膜系统的分离性能。中空纤维长度的影响表明,增加活性纤维长度会增大有效传质面积,但会稀释O2(46% ~ 28%)和CO2(93% ~ 73%)的渗透侧纯度。结果表明,进口压力增大,浓度梯度增大,通过膜的通量增大。
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来源期刊
Greenhouse Gases: Science and Technology
Greenhouse Gases: Science and Technology ENERGY & FUELS-ENGINEERING, ENVIRONMENTAL
CiteScore
4.90
自引率
4.50%
发文量
55
审稿时长
3 months
期刊介绍: Greenhouse Gases: Science and Technology is a new online-only scientific journal dedicated to the management of greenhouse gases. The journal will focus on methods for carbon capture and storage (CCS), as well as utilization of carbon dioxide (CO2) as a feedstock for fuels and chemicals. GHG will also provide insight into strategies to mitigate emissions of other greenhouse gases. Significant advances will be explored in critical reviews, commentary articles and short communications of broad interest. In addition, the journal will offer analyses of relevant economic and political issues, industry developments and case studies. Greenhouse Gases: Science and Technology is an exciting new online-only journal published as a co-operative venture of the SCI (Society of Chemical Industry) and John Wiley & Sons, Ltd
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