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Preparation of Cylindrical Extrudates of Mesoporous Silica-alumina without Use of Binder and Their Activity in Cracking of Cumene.

SYSNO ASEP	0460629
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Preparation of Cylindrical Extrudates of Mesoporous Silica-alumina without Use of Binder and Their Activity in Cracking of Cumene.
Author(s)	Vít, Zdeněk (UCHP-M)_{RID, SAI}
Source Title	Journal of Porous Materials. - : Springer - ISSN 1380-2224 Roč. 23, č. 4 (2016), s. 1125-1132
Number of pages	8 s.
Language	eng - English
Country	NL - Netherlands
Keywords	mesoporous ; silica-alumina ; binderless exstrusion
Subject RIV	CF - Physical ; Theoretical Chemistry
R&D Projects	GAP106/11/0902 GA ČR - Czech Science Foundation (CSF)
Institutional support	UCHP-M - RVO:67985858
UT WOS	000379169400030
EID SCOPUS	84962034183
DOI	10.1007/s10934-016-0170-7
Annotation	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.
Workplace	Institute of Chemical Process Fundamentals
Contact	Eva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227
Year of Publishing	2017

Number of the records: 1