Simultaneous production during biogas upgrading: Foundational insights from numerical simulation of dual-reflux pressure swing adsorption
Biogas upgrading is a key step in improving the properties of biogas, particularly its methane concentration and, consequently, its energy content, by separating carbon dioxide. This process holds significant environmental and economic relevance, especially when high-purity methane and carbon dioxid...
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Elsevier
2025-04-01
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| Series: | Next Energy |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2949821X25000055 |
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| author | Mohd Hardyianto Vai Bahrun Awang Bono Norasikin Othman Muhammad Abbas Ahmad Zaini |
| author_facet | Mohd Hardyianto Vai Bahrun Awang Bono Norasikin Othman Muhammad Abbas Ahmad Zaini |
| author_sort | Mohd Hardyianto Vai Bahrun |
| collection | DOAJ |
| description | Biogas upgrading is a key step in improving the properties of biogas, particularly its methane concentration and, consequently, its energy content, by separating carbon dioxide. This process holds significant environmental and economic relevance, especially when high-purity methane and carbon dioxide can be simultaneously produced. In this regard, dual-reflux pressure swing adsorption (DR-PSA) emerges as a promising technology that achieves the separation objective. In this study, a numerical simulation model of a non-isothermal DR-PSA was established using the Aspen Adsorption simulation tool to evaluate the dynamics of the system for binary separation of biogas feed mixture containing 45 mol% CO2 + 55 mol% CH4, using a CO2-selective silica gel as the solid adsorbent. The goal was to provide preliminary insights into the capability of the DR-PSA process (with silica gel) to produce two useful products, CH4 and CO2, under typical biogas feed conditions. The behavior of the DR-PSA is described through pressure and temperature profiles within the bed column at cyclic steady-state conditions. The results indicate that, under preliminary unoptimized conditions, 86.0% of CH4 could be recovered with a purity of 85.8% as a light product, whereas CO2 enriched to 82.9% was achievable as a heavy product, with a recovery of 82.9%, using a pressure ratio, PH/PL of 5. Further work is recommended to investigate several operating parameters to achieve optimal binary separation with the highest possible recoveries. |
| format | Article |
| id | doaj-art-7cfe0ce9c11e4f5e8eab71926d7d90f6 |
| institution | Kabale University |
| issn | 2949-821X |
| language | English |
| publishDate | 2025-04-01 |
| publisher | Elsevier |
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| series | Next Energy |
| spelling | doaj-art-7cfe0ce9c11e4f5e8eab71926d7d90f62025-01-23T05:28:06ZengElsevierNext Energy2949-821X2025-04-017100242Simultaneous production during biogas upgrading: Foundational insights from numerical simulation of dual-reflux pressure swing adsorptionMohd Hardyianto Vai Bahrun0Awang Bono1Norasikin Othman2Muhammad Abbas Ahmad Zaini3Department of Chemical Engineering, Faculty of Chemical and Energy Engineering, Universiti Teknologi Malaysia, Johor Bahru, Johor 81310 UTM, MalaysiaGRISM Innovative Solutions, Kota Kinabalu, Sabah, MalaysiaDepartment of Chemical Engineering, Faculty of Chemical and Energy Engineering, Universiti Teknologi Malaysia, Johor Bahru, Johor 81310 UTM, Malaysia; Centre of Lipids Engineering and Applied Research (CLEAR), Ibnu-Sina Institute for Scientific and Industrial Research (ISI-SIR), Universiti Teknologi Malaysia, Johor Bahru, Johor 81310 UTM, MalaysiaDepartment of Chemical Engineering, Faculty of Chemical and Energy Engineering, Universiti Teknologi Malaysia, Johor Bahru, Johor 81310 UTM, Malaysia; Centre of Lipids Engineering and Applied Research (CLEAR), Ibnu-Sina Institute for Scientific and Industrial Research (ISI-SIR), Universiti Teknologi Malaysia, Johor Bahru, Johor 81310 UTM, Malaysia; Corresponding author at: Department of Chemical Engineering, Faculty of Chemical and Energy Engineering, Universiti Teknologi Malaysia, Johor Bahru, Johor 81310 UTM, MalaysiaBiogas upgrading is a key step in improving the properties of biogas, particularly its methane concentration and, consequently, its energy content, by separating carbon dioxide. This process holds significant environmental and economic relevance, especially when high-purity methane and carbon dioxide can be simultaneously produced. In this regard, dual-reflux pressure swing adsorption (DR-PSA) emerges as a promising technology that achieves the separation objective. In this study, a numerical simulation model of a non-isothermal DR-PSA was established using the Aspen Adsorption simulation tool to evaluate the dynamics of the system for binary separation of biogas feed mixture containing 45 mol% CO2 + 55 mol% CH4, using a CO2-selective silica gel as the solid adsorbent. The goal was to provide preliminary insights into the capability of the DR-PSA process (with silica gel) to produce two useful products, CH4 and CO2, under typical biogas feed conditions. The behavior of the DR-PSA is described through pressure and temperature profiles within the bed column at cyclic steady-state conditions. The results indicate that, under preliminary unoptimized conditions, 86.0% of CH4 could be recovered with a purity of 85.8% as a light product, whereas CO2 enriched to 82.9% was achievable as a heavy product, with a recovery of 82.9%, using a pressure ratio, PH/PL of 5. Further work is recommended to investigate several operating parameters to achieve optimal binary separation with the highest possible recoveries.http://www.sciencedirect.com/science/article/pii/S2949821X25000055Aspen AdsorptionBiogas upgradingDual-reflux PSANumerical simulationSilica gel |
| spellingShingle | Mohd Hardyianto Vai Bahrun Awang Bono Norasikin Othman Muhammad Abbas Ahmad Zaini Simultaneous production during biogas upgrading: Foundational insights from numerical simulation of dual-reflux pressure swing adsorption Next Energy Aspen Adsorption Biogas upgrading Dual-reflux PSA Numerical simulation Silica gel |
| title | Simultaneous production during biogas upgrading: Foundational insights from numerical simulation of dual-reflux pressure swing adsorption |
| title_full | Simultaneous production during biogas upgrading: Foundational insights from numerical simulation of dual-reflux pressure swing adsorption |
| title_fullStr | Simultaneous production during biogas upgrading: Foundational insights from numerical simulation of dual-reflux pressure swing adsorption |
| title_full_unstemmed | Simultaneous production during biogas upgrading: Foundational insights from numerical simulation of dual-reflux pressure swing adsorption |
| title_short | Simultaneous production during biogas upgrading: Foundational insights from numerical simulation of dual-reflux pressure swing adsorption |
| title_sort | simultaneous production during biogas upgrading foundational insights from numerical simulation of dual reflux pressure swing adsorption |
| topic | Aspen Adsorption Biogas upgrading Dual-reflux PSA Numerical simulation Silica gel |
| url | http://www.sciencedirect.com/science/article/pii/S2949821X25000055 |
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