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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 28, Number 12
BKCSDE 28(12)
December 20, 2007

Title	Vapor-phase Oxidation of Alkylaromatics over V/TiO₂ and VSb/Al₂O₃ Catalysts: Effect of Alkali Metals
Author	Ji Woong Yoon, Sung Hwa Jhung, Jong-San Chang
Keywords	Alkali metal, Vapor-phase oxidation, Partial oxidation, V/TiO₂, VSb/Al₂O₃, Catalyst
Abstract	Oxidation of alkylaromatics including toluene and p-methoxytoluene has been carried out over alkali metal (AM)-containing catalysts such as AM-V/TiO₂ and AM-VSb/Al₂O₃ in vapor-phase using oxygen as an oxidant. The selectivity for partial oxidations increases with incorporation of an alkali metal or with increasing the basicity of alkali metals (from Na to Cs), irrespective of the supports or reactants. However, the conversion is nearly constant or slightly decreasing with the addition of alkali metals in the catalyst. The increased selectivity may be related with the decreased acidity even though more detailed work is necessary to understand the effect of alkali metals in the oxidation. The AM-VSb/Al₂O₃ may be suggested as a potential selective catalyst for vapor-phase oxidations.
Page	2405 - 0
Full Text	PDF

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