Interaction of Carbon Dioxide with Silver Zeolites
Photooxidation of water to O2 and of Cl⊖ to Cl2 by Ag⊕-exchanged zeolite A is briefly reviewed. Thermodynamic considerations concerning the free energy storage during these reactions are given. Interaction of CO2 with Ag⊕-exchanged zeolite A of various Ag⊕ content, in the original and partially red...
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| Format: | Article |
| Language: | deu |
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Swiss Chemical Society
1988-03-01
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| Series: | CHIMIA |
| Online Access: | https://www.chimia.ch/chimia/article/view/9834 |
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| _version_ | 1850140323268788224 |
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| author | Jürg Baumann Robert Beer Gion Calzaferri |
| author_facet | Jürg Baumann Robert Beer Gion Calzaferri |
| author_sort | Jürg Baumann |
| collection | DOAJ |
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Photooxidation of water to O2 and of Cl⊖ to Cl2 by Ag⊕-exchanged zeolite A is briefly reviewed. Thermodynamic considerations concerning the free energy storage during these reactions are given. Interaction of CO2 with Ag⊕-exchanged zeolite A of various Ag⊕ content, in the original and partially reduced state, is probed by in situ FTIR transmission spectroscopy. Chemisorbed, carbonate-like species are found in samples of low silver content. The CO2 physisorption capacity is lowest for highly Ag⊕-exchanged samples. After removing the physisorbed CO2 by evacuation, a small amount of weakly bound CO2 remains in the zeolite. Its ν3 (asymmetric stretching) frequency is cation dependent, reflecting some specific interaction with the cations. On chemical reduction of the Ag⊕, the amount of weakly bound CO2 markedly increases, accompanied by spectral changes of the ν3 band of CO2.
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| format | Article |
| id | doaj-art-6d58b041f46d4f6b82d4a96e8681b2f2 |
| institution | OA Journals |
| issn | 0009-4293 2673-2424 |
| language | deu |
| publishDate | 1988-03-01 |
| publisher | Swiss Chemical Society |
| record_format | Article |
| series | CHIMIA |
| spelling | doaj-art-6d58b041f46d4f6b82d4a96e8681b2f22025-08-20T02:29:51ZdeuSwiss Chemical SocietyCHIMIA0009-42932673-24241988-03-0142310.2533/chimia.1988.100Interaction of Carbon Dioxide with Silver ZeolitesJürg Baumann0Robert Beer1Gion Calzaferri2Institut für Anorganische, Analytische und Physikalische Chemie Universität Bern Freiestrasse 3, CH - 3012 BernInstitut für Anorganische, Analytische und Physikalische Chemie Universität Bern Freiestrasse 3, CH - 3012 BernInstitut für Anorganische, Analytische und Physikalische Chemie Universität Bern Freiestrasse 3, CH - 3012 Bern Photooxidation of water to O2 and of Cl⊖ to Cl2 by Ag⊕-exchanged zeolite A is briefly reviewed. Thermodynamic considerations concerning the free energy storage during these reactions are given. Interaction of CO2 with Ag⊕-exchanged zeolite A of various Ag⊕ content, in the original and partially reduced state, is probed by in situ FTIR transmission spectroscopy. Chemisorbed, carbonate-like species are found in samples of low silver content. The CO2 physisorption capacity is lowest for highly Ag⊕-exchanged samples. After removing the physisorbed CO2 by evacuation, a small amount of weakly bound CO2 remains in the zeolite. Its ν3 (asymmetric stretching) frequency is cation dependent, reflecting some specific interaction with the cations. On chemical reduction of the Ag⊕, the amount of weakly bound CO2 markedly increases, accompanied by spectral changes of the ν3 band of CO2. https://www.chimia.ch/chimia/article/view/9834 |
| spellingShingle | Jürg Baumann Robert Beer Gion Calzaferri Interaction of Carbon Dioxide with Silver Zeolites CHIMIA |
| title | Interaction of Carbon Dioxide with Silver Zeolites |
| title_full | Interaction of Carbon Dioxide with Silver Zeolites |
| title_fullStr | Interaction of Carbon Dioxide with Silver Zeolites |
| title_full_unstemmed | Interaction of Carbon Dioxide with Silver Zeolites |
| title_short | Interaction of Carbon Dioxide with Silver Zeolites |
| title_sort | interaction of carbon dioxide with silver zeolites |
| url | https://www.chimia.ch/chimia/article/view/9834 |
| work_keys_str_mv | AT jurgbaumann interactionofcarbondioxidewithsilverzeolites AT robertbeer interactionofcarbondioxidewithsilverzeolites AT gioncalzaferri interactionofcarbondioxidewithsilverzeolites |