Dynamic Modeling and Simulation of Acid Gas Removal Using Hollow Fiber Membrane Contactors: A Novel Design Approach

Dynamic Modeling and Simulation of Acid Gas Removal Using Hollow Fiber Membrane Contactors: A Novel Design Approach | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Research Article Dynamic Modeling and Simulation of Acid Gas Removal Using Hollow Fiber Membrane Contactors: A Novel Design Approach mahmoud haghani khah, Nima Ghiasi Tabari, Alireza Geramizadegan This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-6586755/v1 This work is licensed under a CC BY 4.0 License Status: Posted Version 1 posted You are reading this latest preprint version Abstract The growing concentration of carbon dioxide (CO₂) emissions from industrial processes has become a major environmental concern. Hollow Fiber Membrane Contactors (HFMCs) have emerged as a promising alternative for efficient CO₂ capture, offering higher mass transfer rates, lower energy requirements, and reduced solvent losses. However, optimizing the design and operational parameters of HFMCs remains a challenge, requiring a detailed investigation of membrane characteristics, fluid dynamics, and process variables. This study develops a numerical model to simulate CO₂ absorption in HFMCs under various conditions. The model is based on mass transfer equations, membrane diffusion mechanisms, and reaction kinetics of CO₂ absorption into aqueous monoethanolamine (MEA). The results were validated by comparing the simulated CO₂ capture performance with experimental data from previous studies. Key Numerical Findings are: Higher liquid flow rates (0.8 m/s) enhanced CO₂ absorption efficiency, reaching 95.6% removal under optimal conditions. However, increasing the solvent flow beyond this threshold showed negligible improvement due to mass transfer limitations, increasing gas velocity negatively affected CO₂ capture, reducing efficiency from 93.1–85.7%, as a result of reduced residence time, membrane porosity played a crucial role in mass transfer performance, with an optimal porosity of 75% providing the highest absorption rates while maintaining structural stability, the numerical model showed a high level of accuracy, with a deviation of less than 1% compared to experimental and industrial data, and a modified HFMC design with shell-side barriers significantly improved CO₂ absorption compared to traditional HFMC configurations. The study confirms that HFMCs can outperform conventional CO₂ capture technologies if proper operational parameters and membrane characteristics are optimized. CO₂ capture hollow fiber membrane gas-liquid contactor absorption modeling process optimization Full Text Cite Share Download PDF Status: Posted Version 1 posted You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. Our growing team is made up of researchers and industry professionals working together to solve the most critical problems facing scientific publishing. Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-6586755","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":489023444,"identity":"1936f1dc-0b52-4334-bd14-a1bb358c9f29","order_by":0,"name":"mahmoud haghani khah","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAA/0lEQVRIiWNgGAWjYFACHgYGxgYGBjZm9oOPf1QABZiZG4jUws6TbMxwBqSFkUgtDPwMZsKMbSARAlp0G3gPfvy6wy6Pj5khjblwXm00fztQy4+KbTi1mB3gS5aWPZNczMbMeOzxzG3Hc2ccZmxg7DlzG48WHgNpyTbmxDZmhnQD3m3HchuAWpgZ2/BqMf4t2VYP0mImwTvnWO58IrSYSX5sOwzWIs3bUJO7gaCWwzxm1oxtx4FaeJINZxw7kLsRqOUgXr8c7zG++bOtOnF+//GDDz7U1OXOO3/44IMfFbi1MDADEQ+CexhMHsCtHgIYfyDYdYQUj4JRMApGwQgEANOJWjAXhjn9AAAAAElFTkSuQmCC","orcid":"","institution":"dashtestan university","correspondingAuthor":true,"prefix":"","firstName":"mahmoud","middleName":"haghani","lastName":"khah","suffix":""},{"id":489023445,"identity":"c773d6d7-ca55-4402-994a-d0dcb4501ec5","order_by":1,"name":"Nima Ghiasi Tabari","email":"","orcid":"","institution":"borazjan","correspondingAuthor":false,"prefix":"","firstName":"Nima","middleName":"Ghiasi","lastName":"Tabari","suffix":""},{"id":489023446,"identity":"1468f09d-19d6-4474-a6f9-25ddddb12cbc","order_by":2,"name":"Alireza Geramizadegan","email":"","orcid":"","institution":"borazjan","correspondingAuthor":false,"prefix":"","firstName":"Alireza","middleName":"","lastName":"Geramizadegan","suffix":""}],"badges":[],"createdAt":"2025-05-04 05:28:48","currentVersionCode":1,"declarations":"","doi":"10.21203/rs.3.rs-6586755/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-6586755/v1","draftVersion":[],"editorialEvents":[],"editorialNote":"","failedWorkflow":false,"files":[{"id":99319690,"identity":"77308269-aa2a-46cc-af96-e42a2a273628","added_by":"auto","created_at":"2025-12-31 16:37:41","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":655592,"visible":true,"origin":"","legend":"","description":"","filename":"abs.pdf","url":"https://assets-eu.researchsquare.com/files/rs-6586755/v1_covered_958f1a65-8f93-460e-9ad1-89e6322cf54f.pdf"}],"financialInterests":"","formattedTitle":"Dynamic Modeling and Simulation of Acid Gas Removal Using Hollow Fiber Membrane Contactors: A Novel Design Approach","fulltext":[],"fulltextSource":"","fullText":"","funders":[],"hasAdminPriorityOnWorkflow":false,"hasManuscriptDocX":false,"hasOptedInToPreprint":true,"hasPassedJournalQc":"","hasAnyPriority":false,"hideJournal":true,"highlight":"","institution":"","isAcceptedByJournal":false,"isAuthorSuppliedPdf":true,"isDeskRejected":"","isHiddenFromSearch":false,"isInQc":false,"isInWorkflow":false,"isPdf":true,"isPdfUpToDate":true,"isWithdrawnOrRetracted":false,"journal":{"display":true,"email":"[email protected]","identity":"researchsquare","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":true,"externalIdentity":"","sideBox":"","snPcode":"","submissionUrl":"/submission","title":"Research Square","twitterHandle":"researchsquare","acdcEnabled":true,"dfaEnabled":false,"editorialSystem":"","reportingPortfolio":"","inReviewEnabled":false,"inReviewRevisionsEnabled":true},"keywords":"CO₂ capture, hollow fiber membrane, gas-liquid contactor, absorption modeling, process optimization","lastPublishedDoi":"10.21203/rs.3.rs-6586755/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-6586755/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003eThe growing concentration of carbon dioxide (CO₂) emissions from industrial processes has become a major environmental concern. Hollow Fiber Membrane Contactors (HFMCs) have emerged as a promising alternative for efficient CO₂ capture, offering higher mass transfer rates, lower energy requirements, and reduced solvent losses. However, optimizing the design and operational parameters of HFMCs remains a challenge, requiring a detailed investigation of membrane characteristics, fluid dynamics, and process variables. This study develops a numerical model to simulate CO₂ absorption in HFMCs under various conditions. The model is based on mass transfer equations, membrane diffusion mechanisms, and reaction kinetics of CO₂ absorption into aqueous monoethanolamine (MEA). The results were validated by comparing the simulated CO₂ capture performance with experimental data from previous studies. Key Numerical Findings are: Higher liquid flow rates (0.8 m/s) enhanced CO₂ absorption efficiency, reaching 95.6% removal under optimal conditions. 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