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Study of vanadium based mesoporous silicas for oxidative dehydrogenation of propane and n-butane
Authors: Bulánek Roman | Kalužová Alena | Setnička Michal | Zukal Arnošt | Čičmanec Pavel | Mayerová Jana
Year: 2012
Type of publication: článek v odborném periodiku
Name of source: Catalysis Today
Publisher name: Elsevier Science BV
Place: Amsterdam
Page from-to: 149-158
Titles:
Language Name Abstract Keywords
cze Studium vanadiových mezoporézních silik pro oxidativní dehydrogenaci propanu a n-butanu Srovnávací studie katalytického chování Vanad-obsahujících mezoporézních silik v oxidativní dehydrogenaci propanu a n-butanu byla zpracována. Cílem studie bylo stanovit efekt textury siliky na vanadiové komplexy a jejich katalytické chování. připravené materiály byly charakterizovány pomocí XRD, SEM, N2 adsorpce, H2-TPR a DR UV-VIS spektroskopie. Vanad; oxidativní dehydrogenace; mezoporézní silika; propan; butan
eng Study of vanadium based mesoporous silicas for oxidative dehydrogenation of propane and n-butane The comparative study of catalytic performance of V-containing high-surface mesoporous siliceous materials (HMS, SBA-16, SBA-15 and MCM-48) in oxidative dehydrogenation of propane and n-butane (C-3-ODH and C-4-ODH, respectively) was carried out. The aim of study was to investigate effect of silica support texture on the speciation of vanadium complexes and its impact on catalytic behavior in both above mentioned reactions is reported. Prepared catalysts were characterized by XRF for determination of vanadium content, XRD, SEM and N-2-adsorption for study of morphology and texture, and H-2-TPR and DR UV-vis spectroscopy for determination of vanadium complex speciation. All prepared materials were tested in propane and n-butane ODH reaction at 540 degrees C and obtained catalytic results were correlated with their structural and surface characteristics. On the basis of obtained data we conclude that the structure of mesoporous silica support plays decisive role in the case of application of catalysts in n-butane ODH reaction, whereas catalytic performance of investigated catalysts in propane ODH reaction is comparable for all investigated structures. Catalytic performance of investigated materials in C-3-ODH and C-4-ODH can be correlated with population of all tetrahedrally coordinated VOx complexes and only isolated monomeric VOx complexes, respectively. vanadium; oxidative dehydrogenation; mesoporous silicas; propene; butenes

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