Calculation of Heat of Adsorption of Gases and Refrigerants on Activated Carbons from Direct Measurements Fitted to the Dubinin–Astakhov Equation
The heat of adsorption of methane, ethane, carbon dioxide, R-507a and R-134a on several specimens of microporous activated carbons is derived from experimental adsorption data fitted to the Dubinin–Astakhov equation. These adsorption results are compared with literature data obtained from calorimetr...
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| Format: | Article |
| Language: | English |
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SAGE Publishing
2012-07-01
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| Series: | Adsorption Science & Technology |
| Online Access: | https://doi.org/10.1260/0263-6174.30.7.549 |
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| author | Kandadai Srinivasan Pradip Dutta Kim Choon Ng Bidyut Baran Saha |
| author_facet | Kandadai Srinivasan Pradip Dutta Kim Choon Ng Bidyut Baran Saha |
| author_sort | Kandadai Srinivasan |
| collection | DOAJ |
| description | The heat of adsorption of methane, ethane, carbon dioxide, R-507a and R-134a on several specimens of microporous activated carbons is derived from experimental adsorption data fitted to the Dubinin–Astakhov equation. These adsorption results are compared with literature data obtained from calorimetric measurements and from the pressure–temperature relation during isosteric heating/cooling. Because the adsorbed phase volume plays an important role, its dependence on temperature and pressure needs to be correctly assessed. In addition, for super-critical gas adsorption, the evaluation of the pseudo-saturation pressure also needs a judicious treatment. Based on the evaluation of carbon dioxide adsorption, it can be seen that sub-critical and super-critical adsorption show different temperature dependences of the isosteric heat of adsorption. The temperature and loading dependence of this property needs to be taken into account while designing practical systems. Some practical implications of these findings are enumerated. |
| format | Article |
| id | doaj-art-51076f5ea6ab4286a365fd12e96e9015 |
| institution | Kabale University |
| issn | 0263-6174 2048-4038 |
| language | English |
| publishDate | 2012-07-01 |
| publisher | SAGE Publishing |
| record_format | Article |
| series | Adsorption Science & Technology |
| spelling | doaj-art-51076f5ea6ab4286a365fd12e96e90152025-01-02T23:11:47ZengSAGE PublishingAdsorption Science & Technology0263-61742048-40382012-07-013010.1260/0263-6174.30.7.549Calculation of Heat of Adsorption of Gases and Refrigerants on Activated Carbons from Direct Measurements Fitted to the Dubinin–Astakhov EquationKandadai Srinivasan0Pradip Dutta1Kim Choon Ng2Bidyut Baran Saha3 Department of Mechanical Engineering, Indian Institute of Science, Bangalore 560 012, India Department of Mechanical Engineering, Indian Institute of Science, Bangalore 560 012, India Department of Mechanical Engineering, National University of Singapore, Singapore 117576, Singapore Department of Mechanical Engineering and International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, JapanThe heat of adsorption of methane, ethane, carbon dioxide, R-507a and R-134a on several specimens of microporous activated carbons is derived from experimental adsorption data fitted to the Dubinin–Astakhov equation. These adsorption results are compared with literature data obtained from calorimetric measurements and from the pressure–temperature relation during isosteric heating/cooling. Because the adsorbed phase volume plays an important role, its dependence on temperature and pressure needs to be correctly assessed. In addition, for super-critical gas adsorption, the evaluation of the pseudo-saturation pressure also needs a judicious treatment. Based on the evaluation of carbon dioxide adsorption, it can be seen that sub-critical and super-critical adsorption show different temperature dependences of the isosteric heat of adsorption. The temperature and loading dependence of this property needs to be taken into account while designing practical systems. Some practical implications of these findings are enumerated.https://doi.org/10.1260/0263-6174.30.7.549 |
| spellingShingle | Kandadai Srinivasan Pradip Dutta Kim Choon Ng Bidyut Baran Saha Calculation of Heat of Adsorption of Gases and Refrigerants on Activated Carbons from Direct Measurements Fitted to the Dubinin–Astakhov Equation Adsorption Science & Technology |
| title | Calculation of Heat of Adsorption of Gases and Refrigerants on Activated Carbons from Direct Measurements Fitted to the Dubinin–Astakhov Equation |
| title_full | Calculation of Heat of Adsorption of Gases and Refrigerants on Activated Carbons from Direct Measurements Fitted to the Dubinin–Astakhov Equation |
| title_fullStr | Calculation of Heat of Adsorption of Gases and Refrigerants on Activated Carbons from Direct Measurements Fitted to the Dubinin–Astakhov Equation |
| title_full_unstemmed | Calculation of Heat of Adsorption of Gases and Refrigerants on Activated Carbons from Direct Measurements Fitted to the Dubinin–Astakhov Equation |
| title_short | Calculation of Heat of Adsorption of Gases and Refrigerants on Activated Carbons from Direct Measurements Fitted to the Dubinin–Astakhov Equation |
| title_sort | calculation of heat of adsorption of gases and refrigerants on activated carbons from direct measurements fitted to the dubinin astakhov equation |
| url | https://doi.org/10.1260/0263-6174.30.7.549 |
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