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Effect of tellurium promoter on vanadium phosphate catalyst for partial oxidation of n-butane

Taufiq-Yap, Y.H., Asrina, S. Nor, Hutchings, Graham, Dummer, Nicholas and Bartley, Jonathan 2011. Effect of tellurium promoter on vanadium phosphate catalyst for partial oxidation of n-butane. Journal of Natural Gas Chemistry 20 (6) , pp. 635-638. 10.1016/S1003-9953(10)60251-4

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Abstract

Te-promoted (1%) vanadium phosphate catalyst (VPDTe) was prepared via VOPO4·2H2O by calcining its precursor VOHPO4·0.5H2O in a flow of n-butane/air. VPDTe catalyst has resulted a higher existence of V5+ phase with V5+/V4+ ratio of 0.23. SEM micrographs show that Te addition altered the arrangement of the platelets from “rose-like” clusters to layer with irregular shape. Te addition has also markedly lowered the reduction activation energies of the vanadium phosphate catalyst as revealed by TPR profile. The amount of active oxygen species associated with V4+ phase of the Te promoted catalyst was significantly higher than those of the unpromoted catalyst. These observations suggest that high mobility and availability of reactive oxygen species contributed to the enhancement of n-butane conversion up to 80% at 673 K, while only 47% over unpromoted catalyst (2400 h−1, 1.7% n-butane in air).

Item Type: Article
Date Type: Publication
Status: Published
Schools: Chemistry
Cardiff Catalysis Institute (CCI)
Subjects: Q Science > QD Chemistry
Uncontrolled Keywords: Vanadium phosphate; Tellurium; Promoter; Butane oxidation
Publisher: Elsevier
ISSN: 1003-9953
Last Modified: 05 Jul 2019 21:28
URI: http://orca.cf.ac.uk/id/eprint/17275

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