CH4/N2 Adsorptive Separation on Zeolite X/AC Composites
A series of zeolite X/activated carbon (AC) composites were prepared from the same starting materials at various activation time. The corresponding modified samples were obtained by being treated with diluted NH4Cl solution. The relationship between porosity development, surface properties, and CH4/...
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| Format: | Article |
| Language: | English |
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Wiley
2019-01-01
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| Series: | Journal of Chemistry |
| Online Access: | http://dx.doi.org/10.1155/2019/2078360 |
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| author | Cai Long Xue Wen Ping Cheng Wen Ming Hao Jing Hong Ma Rui Feng Li |
| author_facet | Cai Long Xue Wen Ping Cheng Wen Ming Hao Jing Hong Ma Rui Feng Li |
| author_sort | Cai Long Xue |
| collection | DOAJ |
| description | A series of zeolite X/activated carbon (AC) composites were prepared from the same starting materials at various activation time. The corresponding modified samples were obtained by being treated with diluted NH4Cl solution. The relationship between porosity development, surface properties, and CH4/N2 adsorption performance was investigated. The increase of micropore volume is beneficial to the improvement of CH4 and N2 adsorption capacity, but more sensitive for CH4. In addition, the polar functional groups of zeolite X/AC composites may enhance CH4 adsorption capacity. More importantly, both developing micropore structure and surface modification contributed to enhance the adsorption selectivity αCH4/N2. As the optimum sample of these studies, HZAC(24) showed CH4 adsorption capacity of 17.3 cm3/g and the highest adsorption selectivity αCH4/N2 of 3.4. The CH4 and N2 adsorption isotherms of all samples can be well fitted by the Langmuir–Freundlich model. HZAC(24) showed an excellent cyclability of adsorption/desorption of CH4 with a neglectable capacity loss after subsequent cycles. Moreover, HZAC(24) displayed relatively rapid adsorption kinetics. These properties of zeolite X/AC composites are essential for the adsorptive separation of CH4 from N2 in the pressure swing adsorption (PSA) process. |
| format | Article |
| id | doaj-art-b4ede5e907e04a9eabb1219968864c3f |
| institution | Kabale University |
| issn | 2090-9063 2090-9071 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Chemistry |
| spelling | doaj-art-b4ede5e907e04a9eabb1219968864c3f2025-02-03T06:13:05ZengWileyJournal of Chemistry2090-90632090-90712019-01-01201910.1155/2019/20783602078360CH4/N2 Adsorptive Separation on Zeolite X/AC CompositesCai Long Xue0Wen Ping Cheng1Wen Ming Hao2Jing Hong Ma3Rui Feng Li4College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, ChinaCollege of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, ChinaCollege of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, ChinaCollege of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, ChinaCollege of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, ChinaA series of zeolite X/activated carbon (AC) composites were prepared from the same starting materials at various activation time. The corresponding modified samples were obtained by being treated with diluted NH4Cl solution. The relationship between porosity development, surface properties, and CH4/N2 adsorption performance was investigated. The increase of micropore volume is beneficial to the improvement of CH4 and N2 adsorption capacity, but more sensitive for CH4. In addition, the polar functional groups of zeolite X/AC composites may enhance CH4 adsorption capacity. More importantly, both developing micropore structure and surface modification contributed to enhance the adsorption selectivity αCH4/N2. As the optimum sample of these studies, HZAC(24) showed CH4 adsorption capacity of 17.3 cm3/g and the highest adsorption selectivity αCH4/N2 of 3.4. The CH4 and N2 adsorption isotherms of all samples can be well fitted by the Langmuir–Freundlich model. HZAC(24) showed an excellent cyclability of adsorption/desorption of CH4 with a neglectable capacity loss after subsequent cycles. Moreover, HZAC(24) displayed relatively rapid adsorption kinetics. These properties of zeolite X/AC composites are essential for the adsorptive separation of CH4 from N2 in the pressure swing adsorption (PSA) process.http://dx.doi.org/10.1155/2019/2078360 |
| spellingShingle | Cai Long Xue Wen Ping Cheng Wen Ming Hao Jing Hong Ma Rui Feng Li CH4/N2 Adsorptive Separation on Zeolite X/AC Composites Journal of Chemistry |
| title | CH4/N2 Adsorptive Separation on Zeolite X/AC Composites |
| title_full | CH4/N2 Adsorptive Separation on Zeolite X/AC Composites |
| title_fullStr | CH4/N2 Adsorptive Separation on Zeolite X/AC Composites |
| title_full_unstemmed | CH4/N2 Adsorptive Separation on Zeolite X/AC Composites |
| title_short | CH4/N2 Adsorptive Separation on Zeolite X/AC Composites |
| title_sort | ch4 n2 adsorptive separation on zeolite x ac composites |
| url | http://dx.doi.org/10.1155/2019/2078360 |
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