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

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985858%3A_____%2F16%3A00460629" target="_blank" >RIV/67985858:_____/16:00460629 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1007/s10934-016-0170-7" target="_blank" >http://dx.doi.org/10.1007/s10934-016-0170-7</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s10934-016-0170-7" target="_blank" >10.1007/s10934-016-0170-7</a>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CF - Fyzikální chemie a teoretická chemie

OECD FORD obor

—

Projekt

<a href="/cs/project/GAP106%2F11%2F0902" target="_blank" >GAP106/11/0902: Nekonvenční složení a příprava sulfidických hydrorafinačních katalyzátorů</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Porous Materials

ISSN

1380-2224

e-ISSN

—

Svazek periodika

23

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

8

Strana od-do

1125-1132

Kód UT WoS článku

000379169400030

EID výsledku v databázi Scopus

2-s2.0-84962034183