Selective oxidative dehydrogenation of butane over VMgO catalysts

M. A. Chaar, D. Patel, M. C. Kung, H. H. Kung

Research output: Contribution to journalArticle

288 Citations (Scopus)

Abstract

Vanadium-magnesium oxides were found to be selective oxidative dehydrogenation catalysts for butane. The selectivity for dehydrogenation increased with increasing vanadium content until an optimum was reached for samples containing 24 to 54 wt% V2O5. Infrared spectroscopy, X-ray diffraction, Auger electron spectroscopy, and scanning electron microscopy studies of the catalysts suggested that the active component was the compound magnesium orthovanadate. For a given catalyst at about 540 °C, the selectivity for oxidative dehydrogenation increased with decreasing oxygen-to-butane ratio, decreasing conversion, and decreasing temperature. A selectivity of up to 60% was obtained. The high selectivity for oxidative dehydrogenation instead of oxygenate production is attributed to two factors: the basic surface facilitates desorption of basic butenes and butadiene, and the absence of VO lowers the oxidation activity of the surface.

Original languageEnglish
Pages (from-to)483-498
Number of pages16
JournalJournal of Catalysis
Volume105
Issue number2
DOIs
Publication statusPublished - 1987

Fingerprint

Butane
Dehydrogenation
dehydrogenation
butanes
selectivity
catalysts
Vanadium
Catalysts
Catalyst selectivity
Magnesium Compounds
Magnesium compounds
magnesium compounds
Magnesium Oxide
Vanadates
magnesium oxides
vanadium oxides
Magnesia
butenes
Auger electron spectroscopy
butadiene

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology

Cite this

Selective oxidative dehydrogenation of butane over VMgO catalysts. / Chaar, M. A.; Patel, D.; Kung, M. C.; Kung, H. H.

In: Journal of Catalysis, Vol. 105, No. 2, 1987, p. 483-498.

Research output: Contribution to journalArticle

Chaar, M. A. ; Patel, D. ; Kung, M. C. ; Kung, H. H. / Selective oxidative dehydrogenation of butane over VMgO catalysts. In: Journal of Catalysis. 1987 ; Vol. 105, No. 2. pp. 483-498.
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