Aufbau und katalytische Aktivität hierarchisch nano‐strukturierter Oxid‐Katalysatoren – Teil 3: Einfluss der Calcinierungstemperatur auf Stabilität und katalytisches Verhalten geträgerter V2O5/TiO2‐Katalysatoren

Stelzer, Jean Boris; Feldhoff, Armin; Caro, Jürgen; Fait, Martin; Habel, Daniela; Feike, Egbert; Schubert, Helmut

doi:10.1002/cite.200403390

Cited by 9 publications

(4 citation statements)

References 19 publications

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“…Detailed studies on the catalytic activity and its correlation with morphology and phase content is depicted in. 22 …”

Section: Catalytic Activitymentioning

confidence: 97%

“…There has been reported numerous applications of the TiO 2 -V 2 O 5 system. [16][17][18][19][20][21][22] Phase reaction was investigated by Bond et al 20 who found rutile formation under feed gas conditions associated with a loss of oxygen and a predominantly four valent V-ion. The change of the metastable anatase to rutile is the subject of the work of Pask who found that contaminants reduce the transformation temperature.…”

Section: Introductionmentioning

confidence: 99%

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Phase development in the catalytic system V2O5/TiO2 under oxidising conditions

Habel

Stelzer

Feike

et al. 2006

Journal of the European Ceramic Society

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“…Detailed studies on the catalytic activity and its correlation with morphology and phase content is depicted in. 22 …”

Section: Catalytic Activitymentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Phase development in the catalytic system V2O5/TiO2 under oxidising conditions

Habel

Stelzer

Feike

et al. 2006

Journal of the European Ceramic Society

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“…The phase analy ing a Philips XL 20 scanning electron micromost promising catalytic systems [10][11][12][13][14][15][16][17][18][19][20]. The major challenge is to minimize the formation of carbon oxides (CO x ) via consecutive total oxidation of propene that is favored at high degrees of propane conversion due to a higher reactivity of propene as compared to propane.…”

mentioning

confidence: 99%

Impact of preparation method on physico-chemical and catalytic properties of VOx/γ-Al2O3 materials

Schwarz

Habel

Ovsitser

et al. 2008

Journal of Molecular Catalysis A: Chemical

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Two preparation methods (wet saturation impregnation with vanadyl acetylacetonate and ball-milling of γ-Al 2 O 3 with crystalline V 2 O 5 ) were applied to produce two sets of VO x /γ-Al 2 O 3 catalysts with increasing vanadium loadings. Materials from both sets were characterized by XRD, SEM, Raman, TPR and UV/Vis-DRS to elucidate the influence of the preparation method on the morphology of VO x species and on their behavior in the oxidative dehydrogenation of propane (ODP). Edge energies from UV/Vis-DRS experiments were correlated with activity and selectivity data; the lower the edge energy, the lower catalytic activity and the higher propene selectivity. Both preparation methods result in materials with comparable physico-chemical and catalytic properties although very different precursors were used. Especially the calcination step during catalyst preparation seems to transform the different precursor molecules to dispersed VO x species by an equilibration process on the support aterial surface. m

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“…Es zeigte sich, dass die Calcinierungstemperatur (500 C bis 800 C) vor der katalytischen Testung einen groûen Einfluss auf die katalytische Aktivität ausübt [5]. Mit steigender Calcinierungstemperatur fand bei allen Katalysatoren eine deutliche Farbveränderung von gelb nach dunkelbraun statt, und die katalytische Aktivität nahm ab.…”

Section: Einführungunclassified