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http://dx.doi.org/10.5012/bkcs.2007.28.12.2405

Vapor-phase Oxidation of Alkylaromatics over V/TiO2 and VSb/Al2O3 Catalysts: Effect of Alkali Metals  

Yoon, Ji-Woong (Research Center for Nanocatalysts, Korea Research Institute of Chemical Technology)
Jhung, Sung-Hwa (Department of Chemistry, Kyungpook National University)
Chang, Jong-San (Research Center for Nanocatalysts, Korea Research Institute of Chemical Technology)
Publication Information
Bulletin of the Korean Chemical Society / v.28, no.12, 2007 , pp. 2405-2408 More about this Journal
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.
Keywords
Alkali metal; Vapor-phase oxidation; Partial oxidation; $V/TiO_2$; $VSb/Al_2O_3$; Catalyst;
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