Structure, activity and selectivity of V2O5-TiO2 catalysts for o-xylene conversion |
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| Authors: | R. Haase U. Illgen J. Scheve I. W. Schulz |
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| Affiliation: | (1) VEB Chemiekombinat Bitterfeld, DDR-44 Bitterfeld;(2) Zentralinstitut für physikalische Chemie der AdW, Rudower Chausse, DDR 1199 Berlin |
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| Abstract: | The formation of needle shaped crystallites of V6O13 at low V concentrations on V2O5-anatase coated catalysts explains the low selectivity for phthalic anhydride during o-xylene oxidation. The (010) plane of V-oxide, most active for selective oxidation of o-xylene, is not accessible and the contact of this plane with the anatase faces promotes the anatase-rutile transformation and the incorporation and blocking of V4+ ions.
                   V6O13    V , V2O5- ,       -.  (010) , -, ,   - V+4.
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