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{"title":"Development of a multicomponent counter-current flow model to evaluate the impact of oxygen and water vapor on CO2 removal performance in a hollow fiber membrane contactor","authors":"Qiang Yang, Qianguo Lin, Cheng Tung Chong, Yuyang Zhang","doi":"10.1002/ghg.2304","DOIUrl":null,"url":null,"abstract":"<p>Membrane contactor has emerged as a promising technology for flue gas carbon capture as it integrates the advantages of high capture efficiency of absorption technology and compact design of membrane technology. However, the integration performance could be affected by the presence of minor components such as water vapor and residual oxygen in real gas conditions, owing to vapor condensation and dynamic oxidation in gas-liquid transfer interface. Therefore, it remains a need to develop a model that enables the prediction of CO<sub>2</sub> removal performance of membrane contactor under industrial real gas conditions. In the present study, a multicomponent model considering the impact of water vapor and oxygen on CO<sub>2</sub> removal in membrane contactors was developed. The model, based on mass transfer equilibrium, gas reaction kinetics, and diffusion coefficients, describes the transport and reaction dynamics of multicomponent gases within the gas, liquid, and membrane phases. Utilizing the finite element method (FEM) for solution, the model was demonstrated with a case study of CO<sub>2</sub> separation from a quaternary gas mixture by a hollow fiber membrane contactor (HFMC). The results highlight the importance of considering water vapor and oxygen in the design and evaluation of industrial membrane contactor systems, offering valuable insights for enhancing CO<sub>2</sub> separation efficiency in practical applications. © 2024 Society of Chemical Industry and John Wiley & Sons, Ltd.</p>","PeriodicalId":12796,"journal":{"name":"Greenhouse Gases: Science and Technology","volume":"14 5","pages":"776-790"},"PeriodicalIF":2.7000,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Greenhouse Gases: Science and Technology","FirstCategoryId":"93","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/ghg.2304","RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENERGY & FUELS","Score":null,"Total":0}
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Abstract
Membrane contactor has emerged as a promising technology for flue gas carbon capture as it integrates the advantages of high capture efficiency of absorption technology and compact design of membrane technology. However, the integration performance could be affected by the presence of minor components such as water vapor and residual oxygen in real gas conditions, owing to vapor condensation and dynamic oxidation in gas-liquid transfer interface. Therefore, it remains a need to develop a model that enables the prediction of CO2 removal performance of membrane contactor under industrial real gas conditions. In the present study, a multicomponent model considering the impact of water vapor and oxygen on CO2 removal in membrane contactors was developed. The model, based on mass transfer equilibrium, gas reaction kinetics, and diffusion coefficients, describes the transport and reaction dynamics of multicomponent gases within the gas, liquid, and membrane phases. Utilizing the finite element method (FEM) for solution, the model was demonstrated with a case study of CO2 separation from a quaternary gas mixture by a hollow fiber membrane contactor (HFMC). The results highlight the importance of considering water vapor and oxygen in the design and evaluation of industrial membrane contactor systems, offering valuable insights for enhancing CO2 separation efficiency in practical applications. © 2024 Society of Chemical Industry and John Wiley & Sons, Ltd.
开发多组分逆流模型,评估氧气和水蒸气对中空纤维膜接触器去除二氧化碳性能的影响
膜接触器集吸收技术的高捕集效率和膜技术的紧凑设计优势于一身,已成为一种前景广阔的烟气碳捕集技术。然而,在实际气体条件下,由于气液传输界面的水蒸气凝结和动态氧化作用,水蒸气和残余氧气等次要成分的存在可能会影响集成性能。因此,仍有必要建立一个模型,以预测膜接触器在工业实际气体条件下的二氧化碳去除性能。本研究建立了一个多成分模型,考虑了水蒸气和氧气对膜接触器去除二氧化碳的影响。该模型以传质平衡、气体反应动力学和扩散系数为基础,描述了多组分气体在气相、液相和膜相中的传输和反应动力学。利用有限元法(FEM)求解,该模型通过中空纤维膜接触器(HFMC)从四元气体混合物中分离出二氧化碳的案例研究得到了验证。研究结果强调了在设计和评估工业膜接触器系统时考虑水蒸气和氧气的重要性,为提高实际应用中的二氧化碳分离效率提供了宝贵的见解。© 2024 化学工业协会和 John Wiley & Sons, Ltd. 保留所有权利。
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