Enhanced CO2 Adsorption and Selectivity of CO2/N2 on Amine@ZIF-8 Materials
The ZIF-8 crystals were successfully postsynthetically modified using methylamine (MA), ethylenediamine (ED), and N, N′-dimethylethylenediamine (MMEN) to improve their adsorption performance toward CO2. Results showed that, compared with the original ZIF-8, the BET specific surface area of MA-ZIF-8,...
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| Format: | Article |
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SAGE Publishing
2022-01-01
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| Series: | Adsorption Science & Technology |
| Online Access: | http://dx.doi.org/10.1155/2022/3207986 |
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| author | Zhijuan Zhang Pengwei Li Ting Zhao Yuanhan Xia |
| author_facet | Zhijuan Zhang Pengwei Li Ting Zhao Yuanhan Xia |
| author_sort | Zhijuan Zhang |
| collection | DOAJ |
| description | The ZIF-8 crystals were successfully postsynthetically modified using methylamine (MA), ethylenediamine (ED), and N, N′-dimethylethylenediamine (MMEN) to improve their adsorption performance toward CO2. Results showed that, compared with the original ZIF-8, the BET specific surface area of MA-ZIF-8, MMEN-ZIF-8, and ED-ZIF-8 has increased by 118.2%, 92.0%, and 29.8%, respectively. In addition, their total pore volume increased separately by 130.8%, 100%, and 48.7%. The adsorption capacities of CO2 on the amine-modified ZIF-8 samples followed the order MA−ZIF−8>MMEN−ZIF−8>ED−ZIF−8>ZIF−8. The CO2 adsorption capacities at 298 K on MA-ZIF-8, MMEN-ZIF-8, and ED-ZIF-8 were increased by 118.2%, 90.2%, and 29.8%, respectively. What is more, the CO2/N2 selectivities calculated using an IAST model of the amine@ZIF-8 samples at 0.01 bar and 298 K were also significantly improved and followed the order MA−ZIF−8 31.4>ED−ZIF−8 25.1>MMEN−ZIF−8 14.1>ZIF−8 11.5, which increased by 173.0%, 121.4%, and 22.6%, respectively. The isosteric heat of CO2 adsorption (Qst) on the MA-ZIF-8, MMEN-ZIF-8, and ED-ZIF-8 all becomes higher, while Qst of N2 on these samples was slightly lower in comparison with that on the ZIF-8. Furthermore, after six recycle runs of gravimetric CO2 adsorption-desorption on MA-ZIF-8, the adsorption performance of CO2 is still very good, indicating that the MA-ZIF-8 sample has good regeneration performance and can be applied into industrial CO2 adsorption and separation. |
| format | Article |
| id | doaj-art-e989b334db2d4d8dbc943a59d6ca4aaf |
| institution | Kabale University |
| issn | 2048-4038 |
| language | English |
| publishDate | 2022-01-01 |
| publisher | SAGE Publishing |
| record_format | Article |
| series | Adsorption Science & Technology |
| spelling | doaj-art-e989b334db2d4d8dbc943a59d6ca4aaf2025-01-03T00:11:15ZengSAGE PublishingAdsorption Science & Technology2048-40382022-01-01202210.1155/2022/3207986Enhanced CO2 Adsorption and Selectivity of CO2/N2 on Amine@ZIF-8 MaterialsZhijuan Zhang0Pengwei Li1Ting Zhao2Yuanhan Xia3College of PharmacyCollege of PharmacyCollege of PharmacyInstitute of Mass Spectrometer and Atmospheric EnvironmentThe ZIF-8 crystals were successfully postsynthetically modified using methylamine (MA), ethylenediamine (ED), and N, N′-dimethylethylenediamine (MMEN) to improve their adsorption performance toward CO2. Results showed that, compared with the original ZIF-8, the BET specific surface area of MA-ZIF-8, MMEN-ZIF-8, and ED-ZIF-8 has increased by 118.2%, 92.0%, and 29.8%, respectively. In addition, their total pore volume increased separately by 130.8%, 100%, and 48.7%. The adsorption capacities of CO2 on the amine-modified ZIF-8 samples followed the order MA−ZIF−8>MMEN−ZIF−8>ED−ZIF−8>ZIF−8. The CO2 adsorption capacities at 298 K on MA-ZIF-8, MMEN-ZIF-8, and ED-ZIF-8 were increased by 118.2%, 90.2%, and 29.8%, respectively. What is more, the CO2/N2 selectivities calculated using an IAST model of the amine@ZIF-8 samples at 0.01 bar and 298 K were also significantly improved and followed the order MA−ZIF−8 31.4>ED−ZIF−8 25.1>MMEN−ZIF−8 14.1>ZIF−8 11.5, which increased by 173.0%, 121.4%, and 22.6%, respectively. The isosteric heat of CO2 adsorption (Qst) on the MA-ZIF-8, MMEN-ZIF-8, and ED-ZIF-8 all becomes higher, while Qst of N2 on these samples was slightly lower in comparison with that on the ZIF-8. Furthermore, after six recycle runs of gravimetric CO2 adsorption-desorption on MA-ZIF-8, the adsorption performance of CO2 is still very good, indicating that the MA-ZIF-8 sample has good regeneration performance and can be applied into industrial CO2 adsorption and separation.http://dx.doi.org/10.1155/2022/3207986 |
| spellingShingle | Zhijuan Zhang Pengwei Li Ting Zhao Yuanhan Xia Enhanced CO2 Adsorption and Selectivity of CO2/N2 on Amine@ZIF-8 Materials Adsorption Science & Technology |
| title | Enhanced CO2 Adsorption and Selectivity of CO2/N2 on Amine@ZIF-8 Materials |
| title_full | Enhanced CO2 Adsorption and Selectivity of CO2/N2 on Amine@ZIF-8 Materials |
| title_fullStr | Enhanced CO2 Adsorption and Selectivity of CO2/N2 on Amine@ZIF-8 Materials |
| title_full_unstemmed | Enhanced CO2 Adsorption and Selectivity of CO2/N2 on Amine@ZIF-8 Materials |
| title_short | Enhanced CO2 Adsorption and Selectivity of CO2/N2 on Amine@ZIF-8 Materials |
| title_sort | enhanced co2 adsorption and selectivity of co2 n2 on amine zif 8 materials |
| url | http://dx.doi.org/10.1155/2022/3207986 |
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