Physical Adsorption Studies on Mixed Vanadium Oxide Catalysts
Physisorption of N 2 gas at 77 K has been used to measure the surface area (S BET ) and porosity of V 2 O 5 pure and mixtures with Fe, Co or Ni ions in atomic ratios extending from 1 to 50 at %. Calcination of samples was carried out between 473 and 873 K in flowing air. Adsorption isotherms are of...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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SAGE Publications
1984-06-01
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| Series: | Adsorption Science & Technology |
| Online Access: | https://doi.org/10.1177/026361748400100206 |
| _version_ | 1797288888984666112 |
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| author | K. M. Abd El-Salaam E. A. Hassan A. A. Said |
| author_facet | K. M. Abd El-Salaam E. A. Hassan A. A. Said |
| author_sort | K. M. Abd El-Salaam |
| collection | DOAJ |
| description | Physisorption of N 2 gas at 77 K has been used to measure the surface area (S BET ) and porosity of V 2 O 5 pure and mixtures with Fe, Co or Ni ions in atomic ratios extending from 1 to 50 at %. Calcination of samples was carried out between 473 and 873 K in flowing air. Adsorption isotherms are of type IV in the Braunauer classification with hysteresis loops of mixed A and B types, which reveal a very small external surface. Calculation of the pore volume distribution was carried out in addition to V a -t plots in order to study the surface porosity nature which was found to be mesoporous. Finally, the effect of foreign ions on S BET was discussed. |
| first_indexed | 2024-03-07T18:56:11Z |
| format | Article |
| id | doaj.art-290da55fdfbd4276815108694d0e8ebe |
| institution | Directory Open Access Journal |
| issn | 0263-6174 2048-4038 |
| language | English |
| last_indexed | 2024-03-07T18:56:11Z |
| publishDate | 1984-06-01 |
| publisher | SAGE Publications |
| record_format | Article |
| series | Adsorption Science & Technology |
| spelling | doaj.art-290da55fdfbd4276815108694d0e8ebe2024-03-02T00:20:29ZengSAGE PublicationsAdsorption Science & Technology0263-61742048-40381984-06-01110.1177/026361748400100206Physical Adsorption Studies on Mixed Vanadium Oxide CatalystsK. M. Abd El-SalaamE. A. HassanA. A. SaidPhysisorption of N 2 gas at 77 K has been used to measure the surface area (S BET ) and porosity of V 2 O 5 pure and mixtures with Fe, Co or Ni ions in atomic ratios extending from 1 to 50 at %. Calcination of samples was carried out between 473 and 873 K in flowing air. Adsorption isotherms are of type IV in the Braunauer classification with hysteresis loops of mixed A and B types, which reveal a very small external surface. Calculation of the pore volume distribution was carried out in addition to V a -t plots in order to study the surface porosity nature which was found to be mesoporous. Finally, the effect of foreign ions on S BET was discussed.https://doi.org/10.1177/026361748400100206 |
| spellingShingle | K. M. Abd El-Salaam E. A. Hassan A. A. Said Physical Adsorption Studies on Mixed Vanadium Oxide Catalysts Adsorption Science & Technology |
| title | Physical Adsorption Studies on Mixed Vanadium Oxide Catalysts |
| title_full | Physical Adsorption Studies on Mixed Vanadium Oxide Catalysts |
| title_fullStr | Physical Adsorption Studies on Mixed Vanadium Oxide Catalysts |
| title_full_unstemmed | Physical Adsorption Studies on Mixed Vanadium Oxide Catalysts |
| title_short | Physical Adsorption Studies on Mixed Vanadium Oxide Catalysts |
| title_sort | physical adsorption studies on mixed vanadium oxide catalysts |
| url | https://doi.org/10.1177/026361748400100206 |
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