Regeneration of High Silica Zeolites via Advanced Oxidation Processes—A Preliminary Study About Adsorbent Reactivity Toward Ozone
| Autor: | Marie-Hélène Manero, Jean-Noël Foussard, Pierre Monneyron, Stéphane Mathé |
|---|---|
| Přispěvatelé: | Laboratoire d'Ingénierie des Systèmes Biologiques et des Procédés (LISBP), Institut National de la Recherche Agronomique (INRA)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées, Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut National de la Recherche Agronomique (INRA), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS), Université de Toulouse (UT), Institut National des Sciences Appliquées de Toulouse - INSA (FRANCE), Université Toulouse III - Paul Sabatier - UT3 (FRANCE) |
| Jazyk: | angličtina |
| Rok vydání: | 2003 |
| Předmět: |
Ozone
General Chemical Engineering Inorganic chemistry 02 engineering and technology 010501 environmental sciences engineering.material 01 natural sciences chemistry.chemical_compound Adsorption [CHIM.GENI]Chemical Sciences/Chemical engineering Génie chimique Regeneration Reactivity (chemistry) Zeolite Génie des procédés 0105 earth and related environmental sciences General Chemistry [CHIM.MATE]Chemical Sciences/Material chemistry Faujasite 021001 nanoscience & nanotechnology Decomposition catalytic decomposition Silanol chemistry 13. Climate action adsorption engineering High silica zeolites Advanced oxidation processes (AOP) 0210 nano-technology Selectivity |
| Zdroj: | Chemical Engineering Research and Design Chemical Engineering Research and Design, Elsevier, 2003, 81 (9), pp.1193-1198. ⟨10.1205/026387603770866371⟩ Chemical Engineering Research and Design, 2003, 81 (9), pp.1193-1198. ⟨10.1205/026387603770866371⟩ |
| ISSN: | 0263-8762 1744-3563 |
| DOI: | 10.1205/026387603770866371⟩ |
| Popis: | International audience; Aiming at regenerating adsorbents, the reactivity toward ozone of two high silica zeolites (HSZ), a dealuminated faujasite Y (Fau Y) and a silicalite (Sil Z), was investigated. In case of Fau Y, no physical adsorption occurred but a total degradation of ozone. This phenomenon was attributed to an active sites-role of silanol groups (SiOH), mainly developed by the dealumination step. In contrast, the ozone adsorption in the smaller channels of Sil Z was important (about 17 mmol g−1), but when a certain local concentration of ozone was reached, the ozone degradation became significant and increased up to 100%. The ozonated zeolites were regenerated in an oven. Whereas the regeneration was total at 773K, a treatment at 500K seemed insufficient since a co-adsorption phenomenon was observed with suspected nitrous oxides (NO2) as a product of ambient nitrogen oxidation. Whereas the Fau Y was not affected at all by ozonation, the adsorption capacities of Sil Z zeolite were enhanced, and it exhibited a higher selectivity for polar compound. This was attributed to a surface modification, by highly reactive species generated during molecular ozone decomposition |
| Databáze: | OpenAIRE |
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