Analysis of CO<sub>2</sub> Absorption in Gas/Liquid Membrane Contactors with Inserted Descending Hydraulic Diameters of 3D-Printed Turbulence Promoters
The decline in absorption flux across membrane modules is attributed to the increase in concentration polarization resistance in flat-plate membrane contactors for CO<sub>2</sub> absorption using monoethanolamine (MEA) as the absorbent. Researchers have discovered that this effect can be...
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MDPI AG
2025-03-01
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| author | Chii-Dong Ho Yi-Wun Wang Zheng-Zhong Chen Thiam Leng Chew |
| author_facet | Chii-Dong Ho Yi-Wun Wang Zheng-Zhong Chen Thiam Leng Chew |
| author_sort | Chii-Dong Ho |
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| description | The decline in absorption flux across membrane modules is attributed to the increase in concentration polarization resistance in flat-plate membrane contactors for CO<sub>2</sub> absorption using monoethanolamine (MEA) as the absorbent. Researchers have discovered that this effect can be mitigated by inserting turbulence promoters, which enhance turbulence intensity at the cost of increased power consumption, thereby improving CO<sub>2</sub> absorption flux. The performance of flat-plate membrane contactors for CO<sub>2</sub> absorption was further enhanced by reducing the hydraulic diameters of embedded 3D-printed turbulence promoters, considering the increased power consumption. The mass-balance modeling, incorporating chemical reactions, was developed theoretically and conducted experimentally on a flat-plate gas/liquid polytetrafluoroethylene/polypropylene (PTFE/PP) membrane module in the present study. A one-dimensional theoretical analysis, based on the resistance-in-series model and the plug-flow model, was conducted to predict absorption flux and concentration distributions. An economic analysis was also performed on modules with promoter-filled channels, considering different array configurations and geometric shapes of turbulence promoters, weighing both absorption flux improvement and power consumption increment. Device performances were evaluated and compared with those of modules using uniform promoter widths. Additionally, the Sherwood number for the CO<sub>2</sub> membrane absorption module was generalized into a simplified expression to predict the mass transfer coefficient for modules with inserted 3D-printed turbulence promoters. Results showed that the ratio of absorption flux improvement to power consumption increment in descending hydraulic-diameter operations is higher than in uniform hydraulic-diameter operations. |
| format | Article |
| id | doaj-art-741402c94e0a4cbb915c7897564ffb64 |
| institution | DOAJ |
| issn | 2077-0375 |
| language | English |
| publishDate | 2025-03-01 |
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| spelling | doaj-art-741402c94e0a4cbb915c7897564ffb642025-08-20T02:42:22ZengMDPI AGMembranes2077-03752025-03-011538810.3390/membranes15030088Analysis of CO<sub>2</sub> Absorption in Gas/Liquid Membrane Contactors with Inserted Descending Hydraulic Diameters of 3D-Printed Turbulence PromotersChii-Dong Ho0Yi-Wun Wang1Zheng-Zhong Chen2Thiam Leng Chew3Department of Chemical and Materials Engineering, Tamkang University, Tamsui, New Taipei 251301, TaiwanDepartment of Chemical and Materials Engineering, Tamkang University, Tamsui, New Taipei 251301, TaiwanDepartment of Chemical and Materials Engineering, Tamkang University, Tamsui, New Taipei 251301, TaiwanDepartment of Chemical Engineering, Faculty of Engineering, Universiti Teknologi PETRONAS, Seri Iskandar 32610, Perak, MalaysiaThe decline in absorption flux across membrane modules is attributed to the increase in concentration polarization resistance in flat-plate membrane contactors for CO<sub>2</sub> absorption using monoethanolamine (MEA) as the absorbent. Researchers have discovered that this effect can be mitigated by inserting turbulence promoters, which enhance turbulence intensity at the cost of increased power consumption, thereby improving CO<sub>2</sub> absorption flux. The performance of flat-plate membrane contactors for CO<sub>2</sub> absorption was further enhanced by reducing the hydraulic diameters of embedded 3D-printed turbulence promoters, considering the increased power consumption. The mass-balance modeling, incorporating chemical reactions, was developed theoretically and conducted experimentally on a flat-plate gas/liquid polytetrafluoroethylene/polypropylene (PTFE/PP) membrane module in the present study. A one-dimensional theoretical analysis, based on the resistance-in-series model and the plug-flow model, was conducted to predict absorption flux and concentration distributions. An economic analysis was also performed on modules with promoter-filled channels, considering different array configurations and geometric shapes of turbulence promoters, weighing both absorption flux improvement and power consumption increment. Device performances were evaluated and compared with those of modules using uniform promoter widths. Additionally, the Sherwood number for the CO<sub>2</sub> membrane absorption module was generalized into a simplified expression to predict the mass transfer coefficient for modules with inserted 3D-printed turbulence promoters. Results showed that the ratio of absorption flux improvement to power consumption increment in descending hydraulic-diameter operations is higher than in uniform hydraulic-diameter operations.https://www.mdpi.com/2077-0375/15/3/88CO<sub>2</sub> absorptionsherwood numberflat-plate membrane contactorconcentration polarizationhydraulic diameters |
| spellingShingle | Chii-Dong Ho Yi-Wun Wang Zheng-Zhong Chen Thiam Leng Chew Analysis of CO<sub>2</sub> Absorption in Gas/Liquid Membrane Contactors with Inserted Descending Hydraulic Diameters of 3D-Printed Turbulence Promoters Membranes CO<sub>2</sub> absorption sherwood number flat-plate membrane contactor concentration polarization hydraulic diameters |
| title | Analysis of CO<sub>2</sub> Absorption in Gas/Liquid Membrane Contactors with Inserted Descending Hydraulic Diameters of 3D-Printed Turbulence Promoters |
| title_full | Analysis of CO<sub>2</sub> Absorption in Gas/Liquid Membrane Contactors with Inserted Descending Hydraulic Diameters of 3D-Printed Turbulence Promoters |
| title_fullStr | Analysis of CO<sub>2</sub> Absorption in Gas/Liquid Membrane Contactors with Inserted Descending Hydraulic Diameters of 3D-Printed Turbulence Promoters |
| title_full_unstemmed | Analysis of CO<sub>2</sub> Absorption in Gas/Liquid Membrane Contactors with Inserted Descending Hydraulic Diameters of 3D-Printed Turbulence Promoters |
| title_short | Analysis of CO<sub>2</sub> Absorption in Gas/Liquid Membrane Contactors with Inserted Descending Hydraulic Diameters of 3D-Printed Turbulence Promoters |
| title_sort | analysis of co sub 2 sub absorption in gas liquid membrane contactors with inserted descending hydraulic diameters of 3d printed turbulence promoters |
| topic | CO<sub>2</sub> absorption sherwood number flat-plate membrane contactor concentration polarization hydraulic diameters |
| url | https://www.mdpi.com/2077-0375/15/3/88 |
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