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

Bulletin of the Korean chemical society

Ji Woong Yoon¹  Sung Hwa Jhung¹  Jong-San Chang¹ 

关键词: Alkali metal;    Vapor-phase oxidation;    Partial oxidation;    V/TiO2;    VSb/Al2O3;    Catalyst;   

DOI  :  

学科分类：化学（综合）

来源: Korean Chemical Society

【 摘 要 】

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.

【 授权许可】

Unknown