Novel Cellulose Triacetate (CTA)/Cellulose Diacetate (CDA) Blend Membranes Enhanced by Amine Functionalized ZIF-8 for CO<sub>2</sub> Separation
Currently, cellulose acetate (CA) membranes dominate membrane-based CO<sub>2</sub> separation for natural gas purification due to their economical and green nature. However, their lower CO<sub>2</sub> permeability and ease of plasticization are the drawbacks. To overcome thes...
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doaj-0f2b51615c114ac7b05998a4228108652021-09-09T13:54:28ZengMDPI AGPolymers2073-43602021-08-01132946294610.3390/polym13172946Novel Cellulose Triacetate (CTA)/Cellulose Diacetate (CDA) Blend Membranes Enhanced by Amine Functionalized ZIF-8 for CO<sub>2</sub> SeparationAyesha Raza0Susilo Japip1Can Zeng Liang2Sarah Farrukh3Arshad Hussain4Tai-Shung Chung5Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore 117585, SingaporeDepartment of Chemical and Biomolecular Engineering, National University of Singapore, Singapore 117585, SingaporeDepartment of Chemical and Biomolecular Engineering, National University of Singapore, Singapore 117585, SingaporeDepartment of Chemical and Materials Engineering, National University of Sciences and Technology, Islamabad 44000, PakistanDepartment of Chemical and Energy Engineering, Pak-Austria University, Haripur 22621, PakistanDepartment of Chemical and Biomolecular Engineering, National University of Singapore, Singapore 117585, SingaporeCurrently, cellulose acetate (CA) membranes dominate membrane-based CO<sub>2</sub> separation for natural gas purification due to their economical and green nature. However, their lower CO<sub>2</sub> permeability and ease of plasticization are the drawbacks. To overcome these weaknesses, we have developed high-performance mixed matrix membranes (MMMs) consisting of cellulose triacetate (CTA), cellulose diacetate (CDA), and amine functionalized zeolitic imidazolate frameworks (NH<sub>2</sub>-ZIF-8) for CO<sub>2</sub> separation. The NH<sub>2</sub>-ZIF-8 was chosen as a filler because (1) its pore size is between the kinetic diameters of CO<sub>2</sub> and CH<sub>4</sub> and (2) the NH<sub>2</sub> groups attached on the surface of NH<sub>2</sub>-ZIF-8 have good affinity with CO<sub>2</sub> molecules. The incorporation of NH<sub>2</sub>-ZIF-8 in the CTA/CDA blend matrix improved both the gas separation performance and plasticization resistance. The optimized membrane containing 15 wt.% of NH<sub>2</sub>-ZIF-8 had a CO<sub>2</sub> permeability of 11.33 Barrer at 35 °C under the trans-membrane pressure of 5 bar. This is 2-fold higher than the pristine membrane, while showing a superior CO<sub>2</sub>/CH<sub>4</sub> selectivity of 33. In addition, the former had 106% higher CO<sub>2</sub> plasticization resistance of up to about 21 bar and an impressive mixed gas CO<sub>2</sub>/CH<sub>4</sub> selectivity of about 40. Therefore, the newly fabricated MMMs based on the CTA/CDA blend may have great potential for CO<sub>2</sub> separation in the natural gas industry.https://www.mdpi.com/2073-4360/13/17/2946zeolitic imidazolate frameworkspolymer blendmixed matrix membraneplasticization resistanceCO<sub>2</sub> separation |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Ayesha Raza Susilo Japip Can Zeng Liang Sarah Farrukh Arshad Hussain Tai-Shung Chung |
spellingShingle |
Ayesha Raza Susilo Japip Can Zeng Liang Sarah Farrukh Arshad Hussain Tai-Shung Chung Novel Cellulose Triacetate (CTA)/Cellulose Diacetate (CDA) Blend Membranes Enhanced by Amine Functionalized ZIF-8 for CO<sub>2</sub> Separation Polymers zeolitic imidazolate frameworks polymer blend mixed matrix membrane plasticization resistance CO<sub>2</sub> separation |
author_facet |
Ayesha Raza Susilo Japip Can Zeng Liang Sarah Farrukh Arshad Hussain Tai-Shung Chung |
author_sort |
Ayesha Raza |
title |
Novel Cellulose Triacetate (CTA)/Cellulose Diacetate (CDA) Blend Membranes Enhanced by Amine Functionalized ZIF-8 for CO<sub>2</sub> Separation |
title_short |
Novel Cellulose Triacetate (CTA)/Cellulose Diacetate (CDA) Blend Membranes Enhanced by Amine Functionalized ZIF-8 for CO<sub>2</sub> Separation |
title_full |
Novel Cellulose Triacetate (CTA)/Cellulose Diacetate (CDA) Blend Membranes Enhanced by Amine Functionalized ZIF-8 for CO<sub>2</sub> Separation |
title_fullStr |
Novel Cellulose Triacetate (CTA)/Cellulose Diacetate (CDA) Blend Membranes Enhanced by Amine Functionalized ZIF-8 for CO<sub>2</sub> Separation |
title_full_unstemmed |
Novel Cellulose Triacetate (CTA)/Cellulose Diacetate (CDA) Blend Membranes Enhanced by Amine Functionalized ZIF-8 for CO<sub>2</sub> Separation |
title_sort |
novel cellulose triacetate (cta)/cellulose diacetate (cda) blend membranes enhanced by amine functionalized zif-8 for co<sub>2</sub> separation |
publisher |
MDPI AG |
series |
Polymers |
issn |
2073-4360 |
publishDate |
2021-08-01 |
description |
Currently, cellulose acetate (CA) membranes dominate membrane-based CO<sub>2</sub> separation for natural gas purification due to their economical and green nature. However, their lower CO<sub>2</sub> permeability and ease of plasticization are the drawbacks. To overcome these weaknesses, we have developed high-performance mixed matrix membranes (MMMs) consisting of cellulose triacetate (CTA), cellulose diacetate (CDA), and amine functionalized zeolitic imidazolate frameworks (NH<sub>2</sub>-ZIF-8) for CO<sub>2</sub> separation. The NH<sub>2</sub>-ZIF-8 was chosen as a filler because (1) its pore size is between the kinetic diameters of CO<sub>2</sub> and CH<sub>4</sub> and (2) the NH<sub>2</sub> groups attached on the surface of NH<sub>2</sub>-ZIF-8 have good affinity with CO<sub>2</sub> molecules. The incorporation of NH<sub>2</sub>-ZIF-8 in the CTA/CDA blend matrix improved both the gas separation performance and plasticization resistance. The optimized membrane containing 15 wt.% of NH<sub>2</sub>-ZIF-8 had a CO<sub>2</sub> permeability of 11.33 Barrer at 35 °C under the trans-membrane pressure of 5 bar. This is 2-fold higher than the pristine membrane, while showing a superior CO<sub>2</sub>/CH<sub>4</sub> selectivity of 33. In addition, the former had 106% higher CO<sub>2</sub> plasticization resistance of up to about 21 bar and an impressive mixed gas CO<sub>2</sub>/CH<sub>4</sub> selectivity of about 40. Therefore, the newly fabricated MMMs based on the CTA/CDA blend may have great potential for CO<sub>2</sub> separation in the natural gas industry. |
topic |
zeolitic imidazolate frameworks polymer blend mixed matrix membrane plasticization resistance CO<sub>2</sub> separation |
url |
https://www.mdpi.com/2073-4360/13/17/2946 |
work_keys_str_mv |
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