Publikace detail

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

Rok: 2016

Druh publikace: článek v odborném periodiku

Název zdroje: Reaction Kinetics Mechanisms and Catalysis

Název nakladatele: Springer

Místo vydání: Heidelberg

Strana od-do: 319-333

Tituly:

Jazyk	Název	Abstrakt	Klíčová slova
cze	VOx na Al2O3-SBA-15: struktura a aktivita v oxidativní dehydrogenaci etanu	Práce se zabývá transplantací aluminy do SBA-15 materiálu a následnou impregnací VOx částic. Distribuce VOx částic a jejich aktivita a selektivita v oxidativní dehydrogenaci etanu byly studovány.	ODH; etan; UV-VIS; H2-TPR; VOx; Al2O3-SBA-15
eng	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	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.	ODH; Ethane; UV-Vis; H2-TPR; VOx; Al2O3-SBA-15

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