Experimental Measurement of the Adsorption Equilibrium and Kinetics of CO in Chromium-Based Metal-Organic Framework MIL-101
A series of MIL-101 samples with hierarchical pore structures and different surface areas (2000–4800 m 2 /g) was synthesized by hydrothermal method and characterized by X-ray diffraction, thermogravimetric analysis and 77-K N 2 adsorption isotherm. The adsorption equilibrium and kinetics of CO 2 wer...
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| Format: | Article |
| Language: | English |
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SAGE Publishing
2013-12-01
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| Series: | Adsorption Science & Technology |
| Online Access: | https://doi.org/10.1260/0263-6174.31.10.903 |
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| author | Zhongzheng Zhang Hui Wang Jianyuan Li Wei Wei Yuhan Sun |
| author_facet | Zhongzheng Zhang Hui Wang Jianyuan Li Wei Wei Yuhan Sun |
| author_sort | Zhongzheng Zhang |
| collection | DOAJ |
| description | A series of MIL-101 samples with hierarchical pore structures and different surface areas (2000–4800 m 2 /g) was synthesized by hydrothermal method and characterized by X-ray diffraction, thermogravimetric analysis and 77-K N 2 adsorption isotherm. The adsorption equilibrium and kinetics of CO 2 were studied at 288, 298 and 308 K within a pressure range of 0–5 MPa by a volumetric method. The adsorption heat, mass-transfer constant, diffusion coefficient and diffusion activation energy were also investigated in this work. The results showed that the chromium-based MIL-101 adsorbent exhibited an impressive selectivity for CO 2 over N 2 and had an adsorption capacity of 20 mmol/g of CO 2 at 298 K and 5.0 MPa, which was much better than that of other conventional adsorbents (e.g. SBA-15, MCM-41, SG-A). The adsorption heat of CO 2 on MIL-101 was in the range of 21–45 kJ/mol, which decreased with the loading of CO 2 . The mass-transfer constants and diffusion coefficients increased with the temperature and decreased with the pressure, whereas the diffusion activation energy decreased with the increased pressure, indicating that adsorption of CO 2 at high pressures was easier. In addition, a linear correlation was found between CO 2 uptake and surface areas at low pressure, which showed that the adsorption capacity of CO 2 could be controlled by adjusting the surface area of the prepared adsorbents in this condition. |
| format | Article |
| id | doaj-art-9b8d5e4811b349be834b3e4aa7f732ee |
| institution | Kabale University |
| issn | 0263-6174 2048-4038 |
| language | English |
| publishDate | 2013-12-01 |
| publisher | SAGE Publishing |
| record_format | Article |
| series | Adsorption Science & Technology |
| spelling | doaj-art-9b8d5e4811b349be834b3e4aa7f732ee2025-01-02T02:59:02ZengSAGE PublishingAdsorption Science & Technology0263-61742048-40382013-12-013110.1260/0263-6174.31.10.903Experimental Measurement of the Adsorption Equilibrium and Kinetics of CO in Chromium-Based Metal-Organic Framework MIL-101Zhongzheng ZhangHui WangJianyuan LiWei WeiYuhan SunA series of MIL-101 samples with hierarchical pore structures and different surface areas (2000–4800 m 2 /g) was synthesized by hydrothermal method and characterized by X-ray diffraction, thermogravimetric analysis and 77-K N 2 adsorption isotherm. The adsorption equilibrium and kinetics of CO 2 were studied at 288, 298 and 308 K within a pressure range of 0–5 MPa by a volumetric method. The adsorption heat, mass-transfer constant, diffusion coefficient and diffusion activation energy were also investigated in this work. The results showed that the chromium-based MIL-101 adsorbent exhibited an impressive selectivity for CO 2 over N 2 and had an adsorption capacity of 20 mmol/g of CO 2 at 298 K and 5.0 MPa, which was much better than that of other conventional adsorbents (e.g. SBA-15, MCM-41, SG-A). The adsorption heat of CO 2 on MIL-101 was in the range of 21–45 kJ/mol, which decreased with the loading of CO 2 . The mass-transfer constants and diffusion coefficients increased with the temperature and decreased with the pressure, whereas the diffusion activation energy decreased with the increased pressure, indicating that adsorption of CO 2 at high pressures was easier. In addition, a linear correlation was found between CO 2 uptake and surface areas at low pressure, which showed that the adsorption capacity of CO 2 could be controlled by adjusting the surface area of the prepared adsorbents in this condition.https://doi.org/10.1260/0263-6174.31.10.903 |
| spellingShingle | Zhongzheng Zhang Hui Wang Jianyuan Li Wei Wei Yuhan Sun Experimental Measurement of the Adsorption Equilibrium and Kinetics of CO in Chromium-Based Metal-Organic Framework MIL-101 Adsorption Science & Technology |
| title | Experimental Measurement of the Adsorption Equilibrium and Kinetics of CO in Chromium-Based Metal-Organic Framework MIL-101 |
| title_full | Experimental Measurement of the Adsorption Equilibrium and Kinetics of CO in Chromium-Based Metal-Organic Framework MIL-101 |
| title_fullStr | Experimental Measurement of the Adsorption Equilibrium and Kinetics of CO in Chromium-Based Metal-Organic Framework MIL-101 |
| title_full_unstemmed | Experimental Measurement of the Adsorption Equilibrium and Kinetics of CO in Chromium-Based Metal-Organic Framework MIL-101 |
| title_short | Experimental Measurement of the Adsorption Equilibrium and Kinetics of CO in Chromium-Based Metal-Organic Framework MIL-101 |
| title_sort | experimental measurement of the adsorption equilibrium and kinetics of co in chromium based metal organic framework mil 101 |
| url | https://doi.org/10.1260/0263-6174.31.10.903 |
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