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Preparation of Cylindrical Extrudates of Mesoporous Silica-alumina without Use of Binder and Their Activity in Cracking of Cumene.
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SYSNO ASEP 0460629 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Preparation of Cylindrical Extrudates of Mesoporous Silica-alumina without Use of Binder and Their Activity in Cracking of Cumene. Tvůrce(i) Vít, Zdeněk (UCHP-M) RID, SAI Zdroj.dok. Journal of Porous Materials. - : Springer - ISSN 1380-2224
Roč. 23, č. 4 (2016), s. 1125-1132Poč.str. 8 s. Jazyk dok. eng - angličtina Země vyd. NL - Nizozemsko Klíč. slova mesoporous ; silica-alumina ; binderless exstrusion Vědní obor RIV CF - Fyzikální chemie a teoretická chemie CEP GAP106/11/0902 GA ČR - Grantová agentura ČR Institucionální podpora UCHP-M - RVO:67985858 UT WOS 000379169400030 EID SCOPUS 84962034183 DOI 10.1007/s10934-016-0170-7 Anotace A series of mesoporous silica–aluminas (MSA) containing 24–59 wt% Al2O3 was synthesized from sodium metasilicate and aluminum nitrate and extruded in 1/16 cylinders without use of a binder. This was followed by slow hydrogel drying, extraction by water and calcination at 500 °C. This procedure gave stable hard extrudates and the absence of binder allowed to keep the surface area, mesoporosity and cracking activity of MSA at the original high values. The resistance to crushing was much better as compared to commercial molecular sieve 13X. The extrudates have average pore size around 3.5 nm. Their properties were affected by the contents of Al2O3 and residual sodium. The MSA containing 50 wt% Al2O3 possessed the maximum values of surface area, pore volume and activity in cumene cracking. The calcined extrudates showed good water sorption capacity and were stable in aqueous environment. This predestinates the MSA extrudates as the shaped mesoporous acidic carriers for preparation of different supported catalysts. Pracoviště Ústav chemických procesů Kontakt Eva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227 Rok sběru 2017
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