Počet záznamů: 1

Hexagonal mesoporous titanosilicates as support for vanadium oxide-Promising catalysts for the oxidative dehydrogenation of n-butane

SYSNO ASEP	0437093
Druh ASEP	J - Článek v odborném periodiku
Zařazení RIV	J - Článek v odborném periodiku
Poddruh J	Článek ve WOS
Název	Hexagonal mesoporous titanosilicates as support for vanadium oxide-Promising catalysts for the oxidative dehydrogenation of n-butane
Tvůrce(i)	Setnička, M. (CZ) Čičmanec, P. (CZ) Bulánek, R. (CZ) Zukal, Arnošt (UFCH-W)_RID Pastva, Jakub (UFCH-W)_{RID, ORCID}
Zdroj.dok.	Catalysis Today. - : Elsevier - ISSN 0920-5861 Roč. 204, APR 2013 (2013), s. 132-139
Poč.str.	8 s.
Jazyk dok.	eng - angličtina
Země vyd.	NL - Nizozemsko
Klíč. slova	mesoporous titanosilicate ; hexagonal mesoporous structure ; vanadium
Vědní obor RIV	CF - Fyzikální chemie a teoretická chemie
CEP	GAP106/10/0196 GA ČR - Grantová agentura ČR
Institucionální podpora	UFCH-W - RVO:61388955
UT WOS	000314825900019
EID SCOPUS	84873705844
DOI	10.1016/j.cattod.2012.07.028
Anotace	The comparative study of structural properties and catalytic performance of V-containing high-surface mesoporous silica and mesoporous titanosilicate materials (HMS, Ti-HMS) in oxidative dehydrogenation of n-butane (C-4-ODH) was carried out. The aim of the study was to investigate effect of different titanium amount incorporated into silica support on the texture, speciation of vanadium complexes and its impact on catalytic performance. Prepared catalysts were characterized by XRF for determination of vanadium content, DTA/TG for thermal stability of matrix, XRD, SEM and N-2-adsorption for study of morphology and texture, FT-IR and DR UV-vis spectroscopy for verification of successful incorporation of Ti to the matrix and H-2-TPR and DR UV-vis spectroscopy for determination of vanadium complex speciation. All prepared materials were tested in n-butane ODH reaction at 460 degrees C. We conclude that titanium was successfully incorporated into mesoporous structure, which was preserved at least up to 600 degrees C. Catalytic activities of V-Ti-HMS catalysts were approximately four times higher than activity of V-HMS catalyst in spite of the fact that all samples exhibit the same amount of vanadium species with similar distribution. The selectivity to desired products was comparable for all catalysts. Enhanced catalytic activity of V-Ti-HMS materials allows activating of n-butane at significantly lower temperature (by 100 degrees C) compare with V-HMS materials. (c) 2012 Elsevier B.V. All rights reserved.
Pracoviště	Ústav fyzikální chemie J.Heyrovského
Kontakt	Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196
Rok sběru	2015

Počet záznamů: 1