Sorption Properties of Aluminas in Relation to Adsorbate—Adsorbent Interaction
Five calcination products AI–AV were obtained by the calcination of alumina gel in the temperature range 673–1473 K. The adsorption of nitrogen at 77 K on these products was determined volumetrically. The chemisorption of H 2 , CO, CO 2 and CH 4 at 300, 320 and 340 K was also determined for each alu...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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SAGE Publications
1996-12-01
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| Series: | Adsorption Science & Technology |
| Online Access: | https://doi.org/10.1177/026361749601300607 |
| _version_ | 1797283882354081792 |
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| author | Th. El-Nabarawy S.A. El-Hakam A.M. Youssef |
| author_facet | Th. El-Nabarawy S.A. El-Hakam A.M. Youssef |
| author_sort | Th. El-Nabarawy |
| collection | DOAJ |
| description | Five calcination products AI–AV were obtained by the calcination of alumina gel in the temperature range 673–1473 K. The adsorption of nitrogen at 77 K on these products was determined volumetrically. The chemisorption of H 2 , CO, CO 2 and CH 4 at 300, 320 and 340 K was also determined for each alumina sample. Increasing calcination temperature caused phase changes with formation of the most stable phase α-Al 2 O 3 starting at 1273 K and predominating at 1473 K. Chemisorption depends on the nature of the adsorbent and the adsorbate molecules. The amount adsorbed was related to the critical temperature of the gas involved while the heat of adsorption was related to the strength of the interaction between the adsorbent and the adsorbate. The polarizability of the adsorbed gas molecule is a determining factor in its chemisorption, particularly on polar surfaces. |
| first_indexed | 2024-03-07T17:38:14Z |
| format | Article |
| id | doaj.art-bb5de03930884f648cc873b8bf1fbfdf |
| institution | Directory Open Access Journal |
| issn | 0263-6174 2048-4038 |
| language | English |
| last_indexed | 2024-03-07T17:38:14Z |
| publishDate | 1996-12-01 |
| publisher | SAGE Publications |
| record_format | Article |
| series | Adsorption Science & Technology |
| spelling | doaj.art-bb5de03930884f648cc873b8bf1fbfdf2024-03-02T16:29:35ZengSAGE PublicationsAdsorption Science & Technology0263-61742048-40381996-12-011310.1177/026361749601300607Sorption Properties of Aluminas in Relation to Adsorbate—Adsorbent InteractionTh. El-Nabarawy0S.A. El-Hakam1A.M. Youssef2 Laboratory of Surface Chemistry and Catalysis, National Research Centre, Dokki, Cairo, Egypt Chemistry Department, Faculty of Science, University of Mansoura, Mansoura, Egypt Chemistry Department, Faculty of Science, University of Mansoura, Mansoura, EgyptFive calcination products AI–AV were obtained by the calcination of alumina gel in the temperature range 673–1473 K. The adsorption of nitrogen at 77 K on these products was determined volumetrically. The chemisorption of H 2 , CO, CO 2 and CH 4 at 300, 320 and 340 K was also determined for each alumina sample. Increasing calcination temperature caused phase changes with formation of the most stable phase α-Al 2 O 3 starting at 1273 K and predominating at 1473 K. Chemisorption depends on the nature of the adsorbent and the adsorbate molecules. The amount adsorbed was related to the critical temperature of the gas involved while the heat of adsorption was related to the strength of the interaction between the adsorbent and the adsorbate. The polarizability of the adsorbed gas molecule is a determining factor in its chemisorption, particularly on polar surfaces.https://doi.org/10.1177/026361749601300607 |
| spellingShingle | Th. El-Nabarawy S.A. El-Hakam A.M. Youssef Sorption Properties of Aluminas in Relation to Adsorbate—Adsorbent Interaction Adsorption Science & Technology |
| title | Sorption Properties of Aluminas in Relation to Adsorbate—Adsorbent Interaction |
| title_full | Sorption Properties of Aluminas in Relation to Adsorbate—Adsorbent Interaction |
| title_fullStr | Sorption Properties of Aluminas in Relation to Adsorbate—Adsorbent Interaction |
| title_full_unstemmed | Sorption Properties of Aluminas in Relation to Adsorbate—Adsorbent Interaction |
| title_short | Sorption Properties of Aluminas in Relation to Adsorbate—Adsorbent Interaction |
| title_sort | sorption properties of aluminas in relation to adsorbate adsorbent interaction |
| url | https://doi.org/10.1177/026361749601300607 |
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