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Continuity control of b-oriented MFI zeolite films by microwave synthesis / Xianming Li in Industrial & engineering chemistry research, Vol. 49 N° 12 (Juin 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 12 (Juin 2010) . - pp. 5933–5938 Titre : Continuity control of b-oriented MFI zeolite films by microwave synthesis Type de document : texte imprimé Auteurs : Xianming Li, Auteur ; Yushan Yan, Auteur ; Zhengbao Wang, Auteur Année de publication : 2010 Article en page(s) : pp. 5933–5938 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : b-oriented  MFI  zeolite  films  Crystallization Résumé : Influences of aging and crystallization conditions on the continuity of b-oriented MFI zeolite films on stainless steel substrates are systematically investigated. A long aging time (e.g., 20 h) at room temperature is needed to obtain a continuous b-oriented MFI zeolite film by the microwave heating at 165 °C. However, the aging time can be shortened from 20 h to 30 min by elevating the aging temperature to 80 °C. Compared with the conventional heating (2 h), continuous b-oriented MFI zeolite films are prepared on stainless steel substrates with a much shorter crystallization time by the microwave heating (35 min). Continuous b-oriented MFI zeolite films can be synthesized by controlling nuclei concentration and crystal size, which are mainly determined by the conditions of the aging and crystallization respectively. On the basis of the results from these experiments, a film continuity−synthesis condition map is obtained and a film formation mechanism is discussed. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie1000136 [article] Continuity control of b-oriented MFI zeolite films by microwave synthesis [texte imprimé] / Xianming Li, Auteur ; Yushan Yan, Auteur ; Zhengbao Wang, Auteur . - 2010 . - pp. 5933–5938. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 12 (Juin 2010) . - pp. 5933–5938 Mots-clés : b-oriented  MFI  zeolite  films  Crystallization Résumé : Influences of aging and crystallization conditions on the continuity of b-oriented MFI zeolite films on stainless steel substrates are systematically investigated. A long aging time (e.g., 20 h) at room temperature is needed to obtain a continuous b-oriented MFI zeolite film by the microwave heating at 165 °C. However, the aging time can be shortened from 20 h to 30 min by elevating the aging temperature to 80 °C. Compared with the conventional heating (2 h), continuous b-oriented MFI zeolite films are prepared on stainless steel substrates with a much shorter crystallization time by the microwave heating (35 min). Continuous b-oriented MFI zeolite films can be synthesized by controlling nuclei concentration and crystal size, which are mainly determined by the conditions of the aging and crystallization respectively. On the basis of the results from these experiments, a film continuity−synthesis condition map is obtained and a film formation mechanism is discussed. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie1000136