Synthesis of ZIF-8 based composite hollow fiber membrane with a dense skin layer for facilitated biogas upgrading in gas-liquid membrane contactor
Gas-liquid membrane contactor (GLMC) has been regarded as a promising alternative to conventional contacting processes for CO2 absorption. In this work, a composite hollow fiber (HF) membrane with an aminosilane-modified zeolitic imidazolate framework-8 (mZIF-8) based dense skin layer was designed a...
| Main Authors: | , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
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2020
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| Online Access: | https://hdl.handle.net/10356/143710 |
| _version_ | 1811690271567511552 |
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| author | Xu, Yilin Li, Xin Lin, Yuqing Malde, Chandresh Wang, Rong |
| author2 | School of Civil and Environmental Engineering |
| author_facet | School of Civil and Environmental Engineering Xu, Yilin Li, Xin Lin, Yuqing Malde, Chandresh Wang, Rong |
| author_sort | Xu, Yilin |
| collection | NTU |
| description | Gas-liquid membrane contactor (GLMC) has been regarded as a promising alternative to conventional contacting processes for CO2 absorption. In this work, a composite hollow fiber (HF) membrane with an aminosilane-modified zeolitic imidazolate framework-8 (mZIF-8) based dense skin layer was designed and synthesized for high-efficiency biogas upgrading in the GLMC process, by dispersing mZIF-8 nanocrystals into poly(dimethylsiloxane) matrix and then depositing on a porous polyvinylidene fluoride (PVDF) substrate. (3-aminopropyl)triethoxysilane was introduced to modify the ZIF-8 nanocrystals, thereby enabling the chemical bonding with PDMS chains for avoiding interfacial voids and further enhancing hydrophobicity. Compared with the control membrane, the newly developed mZIF-8 based composite membrane with a dense skin exhibited competitive hydrophobicity with a contact angle of 130°, ensuring its anti-wetting ability. It exhibited an enhanced biogas upgrading performance with the absorption fluxes of 2.3 and 3.8 × 10−3 mol m−2·s−1 using water and 1 M monoethanolamine (MEA) as absorbents, respectively (liquid velocity = 0.25 m s−1). In particular, a comparable selectivity of CO2/CH4 with the value of ∼20 was achieved by using MEA as absorbent in the GLMC process. A robust long-term stability of the mZIF-8 based composite HF membrane was also achieved in a 15-day operation. This work offers a new perspective for promoting CO2 mass transfer with mZIF-8 based composite HF membranes, thereby improving the biogas upgrading performance in GLMC applications. |
| first_indexed | 2024-10-01T06:01:21Z |
| format | Journal Article |
| id | ntu-10356/143710 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:01:21Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | ntu-10356/1437102021-02-10T08:54:45Z Synthesis of ZIF-8 based composite hollow fiber membrane with a dense skin layer for facilitated biogas upgrading in gas-liquid membrane contactor Xu, Yilin Li, Xin Lin, Yuqing Malde, Chandresh Wang, Rong School of Civil and Environmental Engineering Interdisciplinary Graduate School (IGS) Nanyang Environment and Water Research Institute Singapore Membrane Technology Centre Engineering::Environmental engineering Zeolitic Imidazolate Framework-8 (3-aminopropyl)triethoxysilane Gas-liquid membrane contactor (GLMC) has been regarded as a promising alternative to conventional contacting processes for CO2 absorption. In this work, a composite hollow fiber (HF) membrane with an aminosilane-modified zeolitic imidazolate framework-8 (mZIF-8) based dense skin layer was designed and synthesized for high-efficiency biogas upgrading in the GLMC process, by dispersing mZIF-8 nanocrystals into poly(dimethylsiloxane) matrix and then depositing on a porous polyvinylidene fluoride (PVDF) substrate. (3-aminopropyl)triethoxysilane was introduced to modify the ZIF-8 nanocrystals, thereby enabling the chemical bonding with PDMS chains for avoiding interfacial voids and further enhancing hydrophobicity. Compared with the control membrane, the newly developed mZIF-8 based composite membrane with a dense skin exhibited competitive hydrophobicity with a contact angle of 130°, ensuring its anti-wetting ability. It exhibited an enhanced biogas upgrading performance with the absorption fluxes of 2.3 and 3.8 × 10−3 mol m−2·s−1 using water and 1 M monoethanolamine (MEA) as absorbents, respectively (liquid velocity = 0.25 m s−1). In particular, a comparable selectivity of CO2/CH4 with the value of ∼20 was achieved by using MEA as absorbent in the GLMC process. A robust long-term stability of the mZIF-8 based composite HF membrane was also achieved in a 15-day operation. This work offers a new perspective for promoting CO2 mass transfer with mZIF-8 based composite HF membranes, thereby improving the biogas upgrading performance in GLMC applications. Economic Development Board (EDB) Accepted version This work was supported by the Johnson Matthey Public Limited Company, UK. We also acknowledge funding support from the Singapore Economic Development Board to the Singapore Membrane Technology Centre. 2020-09-18T01:50:57Z 2020-09-18T01:50:57Z 2019 Journal Article Xu, Y., Li, X., Lin, Y., Malde, C., & Wang, R. (2019). Synthesis of ZIF-8 based composite hollow fiber membrane with a dense skin layer for facilitated biogas upgrading in gas-liquid membrane contactor. Journal of Membrane Science, 585, 238-252. doi:10.1016/j.memsci.2019.05.042 0376-7388 https://hdl.handle.net/10356/143710 10.1016/j.memsci.2019.05.042 585 238 252 en Journal of Membrane Science © 2019 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::Environmental engineering Zeolitic Imidazolate Framework-8 (3-aminopropyl)triethoxysilane Xu, Yilin Li, Xin Lin, Yuqing Malde, Chandresh Wang, Rong Synthesis of ZIF-8 based composite hollow fiber membrane with a dense skin layer for facilitated biogas upgrading in gas-liquid membrane contactor |
| title | Synthesis of ZIF-8 based composite hollow fiber membrane with a dense skin layer for facilitated biogas upgrading in gas-liquid membrane contactor |
| title_full | Synthesis of ZIF-8 based composite hollow fiber membrane with a dense skin layer for facilitated biogas upgrading in gas-liquid membrane contactor |
| title_fullStr | Synthesis of ZIF-8 based composite hollow fiber membrane with a dense skin layer for facilitated biogas upgrading in gas-liquid membrane contactor |
| title_full_unstemmed | Synthesis of ZIF-8 based composite hollow fiber membrane with a dense skin layer for facilitated biogas upgrading in gas-liquid membrane contactor |
| title_short | Synthesis of ZIF-8 based composite hollow fiber membrane with a dense skin layer for facilitated biogas upgrading in gas-liquid membrane contactor |
| title_sort | synthesis of zif 8 based composite hollow fiber membrane with a dense skin layer for facilitated biogas upgrading in gas liquid membrane contactor |
| topic | Engineering::Environmental engineering Zeolitic Imidazolate Framework-8 (3-aminopropyl)triethoxysilane |
| url | https://hdl.handle.net/10356/143710 |
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