Biocatalytic PVDF composite hollow fiber membranes for CO2 removal in gas-liquid membrane contactor
A highly efficient biocatalytic carbonic anhydrase (CA)-polydopamine (PDA)/polyethylenimine (PEI)-polyvinylidene fluoride (PVDF) (referred to as CA-m-PVDF) composite membrane was fabricated for CO2 conversion and capture in the gas-liquid membrane contactor (GLMC) process. The co-deposition of PDA/P...
| Main Authors: | , , , , |
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| Format: | Journal Article |
| Language: | English |
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2020
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| Online Access: | https://hdl.handle.net/10356/136794 |
| _version_ | 1811686914008285184 |
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| author | Xu, Yilin Lin, Yuqing Chew. Nick Guan Pin Malde, Chandresh Wang, Rong |
| author2 | School of Civil and Environmental Engineering |
| author_facet | School of Civil and Environmental Engineering Xu, Yilin Lin, Yuqing Chew. Nick Guan Pin Malde, Chandresh Wang, Rong |
| author_sort | Xu, Yilin |
| collection | NTU |
| description | A highly efficient biocatalytic carbonic anhydrase (CA)-polydopamine (PDA)/polyethylenimine (PEI)-polyvinylidene fluoride (PVDF) (referred to as CA-m-PVDF) composite membrane was fabricated for CO2 conversion and capture in the gas-liquid membrane contactor (GLMC) process. The co-deposition of PDA/PEI with amino functional groups was employed to amine-functionalize a PVDF substrate as support for subsequent in-situ CA immobilization by cross-linking with glutaraldehyde. This enhances the enzyme stability and prolongs its lifespan, thus facilitates CO2 hydration efficiency in the GLMC process. In this work, different immobilization CA protocols were compared based on the CA activity and activity recovery. For biocatalytic CA-m-PVDF membranes, the best activity of 498 U m−2 (membrane) and a corresponding activity recovery of 31.5% were achieved (m(5 h)-PVDF as support, 0.67 (v/v)% GLU as cross-linking agent, 600 μg mL−1 CA solution, pH 8.0, temperature at 25 °C, and 24 h reaction time). By using water as absorbent with a liquid velocity of 0.25 m s−1 in a bench-scale GLMC setup, a high-efficiency CO2 absorption flux of 2.5 × 10−3 mol m−2 s−1 was obtained, which was ~165% higher than that of the non-biocatalytic m-PVDF membrane. The long-term stability test showed a good enzyme activity for CO2 hydration capacity for the CA-m-PVDF membranes during 40 days of test duration. Overall, the results achieved in this work may provide promising insights into enzyme immobilization on polymeric supports for the development of high-efficiency biocatalytic membranes for CO2 capture in GLMC applications. |
| first_indexed | 2024-10-01T05:07:59Z |
| format | Journal Article |
| id | ntu-10356/136794 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:07:59Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | ntu-10356/1367942020-01-29T03:52:19Z Biocatalytic PVDF composite hollow fiber membranes for CO2 removal in gas-liquid membrane contactor Xu, Yilin Lin, Yuqing Chew. Nick Guan Pin Malde, Chandresh Wang, Rong School of Civil and Environmental Engineering Nanyang Environment and Water Research Institute Singapore Membrane Technology Centre Engineering::Civil engineering CO2 Removal Gas-liquid Membrane Contactor A highly efficient biocatalytic carbonic anhydrase (CA)-polydopamine (PDA)/polyethylenimine (PEI)-polyvinylidene fluoride (PVDF) (referred to as CA-m-PVDF) composite membrane was fabricated for CO2 conversion and capture in the gas-liquid membrane contactor (GLMC) process. The co-deposition of PDA/PEI with amino functional groups was employed to amine-functionalize a PVDF substrate as support for subsequent in-situ CA immobilization by cross-linking with glutaraldehyde. This enhances the enzyme stability and prolongs its lifespan, thus facilitates CO2 hydration efficiency in the GLMC process. In this work, different immobilization CA protocols were compared based on the CA activity and activity recovery. For biocatalytic CA-m-PVDF membranes, the best activity of 498 U m−2 (membrane) and a corresponding activity recovery of 31.5% were achieved (m(5 h)-PVDF as support, 0.67 (v/v)% GLU as cross-linking agent, 600 μg mL−1 CA solution, pH 8.0, temperature at 25 °C, and 24 h reaction time). By using water as absorbent with a liquid velocity of 0.25 m s−1 in a bench-scale GLMC setup, a high-efficiency CO2 absorption flux of 2.5 × 10−3 mol m−2 s−1 was obtained, which was ~165% higher than that of the non-biocatalytic m-PVDF membrane. The long-term stability test showed a good enzyme activity for CO2 hydration capacity for the CA-m-PVDF membranes during 40 days of test duration. Overall, the results achieved in this work may provide promising insights into enzyme immobilization on polymeric supports for the development of high-efficiency biocatalytic membranes for CO2 capture in GLMC applications. EDB (Economic Devt. Board, S’pore) Accepted version 2020-01-29T03:52:18Z 2020-01-29T03:52:18Z 2018 Journal Article Xu, Y., Lin, Y., Chew, N. G. P., Malde, C., & Wang, R. (2019). Biocatalytic PVDF composite hollow fiber membranes for CO2 removal in gas-liquid membrane contactor. Journal of Membrane Science, 572, 532-544. doi:10.1016/j.memsci.2018.11.043 0376-7388 https://hdl.handle.net/10356/136794 10.1016/j.memsci.2018.11.043 2-s2.0-85057179696 572 532 544 en Journal of Membrane Science © 2018 Elsevier B.V. All rights reserved. This paper was published in Journal of Membrane Science and is made available with permission of Elsevier B.V. application/pdf |
| spellingShingle | Engineering::Civil engineering CO2 Removal Gas-liquid Membrane Contactor Xu, Yilin Lin, Yuqing Chew. Nick Guan Pin Malde, Chandresh Wang, Rong Biocatalytic PVDF composite hollow fiber membranes for CO2 removal in gas-liquid membrane contactor |
| title | Biocatalytic PVDF composite hollow fiber membranes for CO2 removal in gas-liquid membrane contactor |
| title_full | Biocatalytic PVDF composite hollow fiber membranes for CO2 removal in gas-liquid membrane contactor |
| title_fullStr | Biocatalytic PVDF composite hollow fiber membranes for CO2 removal in gas-liquid membrane contactor |
| title_full_unstemmed | Biocatalytic PVDF composite hollow fiber membranes for CO2 removal in gas-liquid membrane contactor |
| title_short | Biocatalytic PVDF composite hollow fiber membranes for CO2 removal in gas-liquid membrane contactor |
| title_sort | biocatalytic pvdf composite hollow fiber membranes for co2 removal in gas liquid membrane contactor |
| topic | Engineering::Civil engineering CO2 Removal Gas-liquid Membrane Contactor |
| url | https://hdl.handle.net/10356/136794 |
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