Highly active titania supported ceria catalysts for ammoxidation of picolines

P, Kanta Rao and K S , Rama Rao and S, Khaja Masthan and K V , Narayana and T, Rajiah and V, Venkat Rao (1997) Highly active titania supported ceria catalysts for ammoxidation of picolines. Applied Catalysis A: General , 163 (1-2). pp. 123-127.

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Abstract

TiO2 supported ceria catalysts with 20 wt% CeO2 were prepared by impregnating rutile and anatase polymorphs in aqueous solution of ammonium ceric nitrate [(NH4)2Ce(NO3)6], characterized by BET surface area measurement and low temperature oxygen chemisorption (LTOC) at −78°C and evaluated for ammoxidation of β- and γ-picolines. Anatase supported catalyst has exhibited higher ammoxidation activities than rutile supported one and pure ceria. Turnover frequencies calculated from ammoxidation rates and irreversible O2 uptakes in respect to a particular picoline isomer were almost equal for pure supports on one hand and for supported ceria catalysts on the other. The two structural isomers, β- and γ-picolines seem to have exhibited marked steric effect in their reactivity in catalysis on the catalysts.

Item Type:	Article
Uncontrolled Keywords:	Titania supported ceria catalyst; Ammoxidation of β- and γ-picolines; Low temperature oxygen chemisorption; Coordinatively unsaturated site
Subjects:	Science > Chemistry
ID Code:	998
Deposited By:	Prof Balasubramanian Viswanathan
Deposited On:	04 Aug 2007 16:03
Last Modified:	04 Aug 2007 16:03

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