VOx species supported on Al2O3-SBA-15 prepared by the grafting of alumina onto SBA-15: structure and activity in the oxidative dehydrogenation of ethane

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F16%3A00472527" target="_blank" >RIV/61388955:_____/16:00472527 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216275:25310/16:39902152

Výsledek na webu

<a href="http://dx.doi.org/10.1007/s11144-016-1036-3" target="_blank" >http://dx.doi.org/10.1007/s11144-016-1036-3</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s11144-016-1036-3" target="_blank" >10.1007/s11144-016-1036-3</a>

Jazyk výsledku

angličtina

Název v původním jazyce

VOx species supported on Al2O3-SBA-15 prepared by the grafting of alumina onto SBA-15: structure and activity in the oxidative dehydrogenation of ethane

Popis výsledku v původním jazyce

This paper focuses attention on the grafting of alumina onto SBA-15 material and the subsequent impregnation of vanadium oxide species (VO (x) ). The role of alumina loading on the distribution of VOx species was studied in V-Al2O3-SBA-15 catalysts and its activity/selectivity in oxidative dehydrogenation of ethane. The activity of V-Al2O3-SBA-15 materials are correlated with the textural properties (N-2-adsorption/desorption isotherms), the distribution of VO (x) species (H-2-TPR and DR UV-vis) and the acidic properties (NH3-TPD). While V-SBA-15 mainly contains monomeric tetrahedrally coordinated VOx species, grafting of alumina on SBA-15 catalysts result in decreasing population of isolated monomeric VOx units in V-Al2O3-SBA-15 catalysts, increasing population of T (d) oligomeric VOx species and the formation of a low amount of octahedrally coordinated VOx species. V-Al2O3-SBA-15 catalysts are more selective to ethane (at the same conversion of ethane) compared to V-SBA-15 and V-alumina catalysts.

Název v anglickém jazyce

VOx species supported on Al2O3-SBA-15 prepared by the grafting of alumina onto SBA-15: structure and activity in the oxidative dehydrogenation of ethane

Popis výsledku anglicky

This paper focuses attention on the grafting of alumina onto SBA-15 material and the subsequent impregnation of vanadium oxide species (VO (x) ). The role of alumina loading on the distribution of VOx species was studied in V-Al2O3-SBA-15 catalysts and its activity/selectivity in oxidative dehydrogenation of ethane. The activity of V-Al2O3-SBA-15 materials are correlated with the textural properties (N-2-adsorption/desorption isotherms), the distribution of VO (x) species (H-2-TPR and DR UV-vis) and the acidic properties (NH3-TPD). While V-SBA-15 mainly contains monomeric tetrahedrally coordinated VOx species, grafting of alumina on SBA-15 catalysts result in decreasing population of isolated monomeric VOx units in V-Al2O3-SBA-15 catalysts, increasing population of T (d) oligomeric VOx species and the formation of a low amount of octahedrally coordinated VOx species. V-Al2O3-SBA-15 catalysts are more selective to ethane (at the same conversion of ethane) compared to V-SBA-15 and V-alumina 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%2F10%2F0196" target="_blank" >GAP106/10/0196: Pokročilé nanostrukturní katalyzátory na bázi vanadu pro oxidativně dehydrogenační reakce</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

Reaction Kinetics Mechanism and Catalysis

ISSN

1878-5190

e-ISSN

—

Svazek periodika

119

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

15

Strana od-do

319-333

Kód UT WoS článku

000382942100024

EID výsledku v databázi Scopus

2-s2.0-84987597381