Počet záznamů: 1
Post-synthesis modification of TUN zeolite: Textural, acidic and catalytic properties
- 1.
SYSNO ASEP 0359894 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Post-synthesis modification of TUN zeolite: Textural, acidic and catalytic properties Tvůrce(i) Kubů, Martin (UFCH-W) RID
Žilková, Naděžda (UFCH-W) RID, ORCID
Čejka, Jiří (UFCH-W) RID, ORCID, SAIZdroj.dok. Catalysis Today. - : Elsevier - ISSN 0920-5861
Roč. 168, č. 1 (2011), s. 63-70Poč.str. 8 s. Jazyk dok. eng - angličtina Země vyd. NL - Nizozemsko Klíč. slova TUN ; dealumination ; desilication Vědní obor RIV CF - Fyzikální chemie a teoretická chemie CEP GD203/08/H032 GA ČR - Grantová agentura ČR GAP106/11/0819 GA ČR - Grantová agentura ČR CEZ AV0Z40400503 - UFCH-W (2005-2011) UT WOS 000291033300008 DOI 10.1016/j.cattod.2010.11.090 Anotace Dealumination, desilication and silylation of TUN zeolite was investigated and related to the catalytic behavior in toluene disproportionation and its alkylation with isopropyl alcohol. Only negligible concentration of acid sites was identified on the “external” surface of parent TUN zeolite and this concentration increased with increasing desilication. Silylation resulted in channel narrowing and probably some plugging. As a result, significant increase in the para-selectivity in toluene disproportionation and its alkylation with isopropyl alcohol was achieved. No changes in toluene conversion were observed for all parent and modified samples in toluene alkylation confirming diffusion and transport of products as the rate determining step in 10-ring zeolites. Selectivity to cymenes and p-cymene decreased with dealumination as well as desilication. In contrast, silylation increased both cymene (80%) and p-cymene (90%) selectivity in toluene alkylation. Pracoviště Ústav fyzikální chemie J.Heyrovského Kontakt Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Rok sběru 2012
Počet záznamů: 1