Research Journal of Recent Sciences ________________________________________________ ISSN 2277-2502
Vol. 1 (ISC-2011), 178-184 (2012)
Res.J.Recent Sci.

LaCoO3 perovskite catalysts for the environmental application of
Auto motive CO oxidation
Patel Femina and Patel Sanjay
Department of Chemical Engineering, Institute of Technology, Nirma University, Ahmedabad-382481, INDIA

Available online at: www.isca.in
(Received 15th October 2011, revised 10th January 2012, accepted 25th January 2012)

Abstract
Perovskite-type oxides were synthesized through conventional citrate methods. The synthesized perovskite materials had the
nominal compositions of LaCoO3, LaCo0.8Cu0.2O3, La0.8Sr0.2CoO3 and La0.8Sr0.2Co0.8Cu0.2O3. The catalytic activity of the
perovskite samples (for CO oxidation) were measured using a stainless steel reactor with an inlet gas mixture containing
exhaust composition as gasoline engine. The prepared perovskite samples were characterized by nitrogen adsorption (BET),
EDX and XRD analyses. The perovskite catalysts showed good structural and chemical stability and high activity for the
catalytic CO oxidation reaction. The catalyst samples prepared by the citrate method achieved the same CO conversion at
lower temperatures than those prepared by the sol gel method. This was attributed to a better-formed perovskite crystals by the
citrate method. Substituted perovskite composition showed higher activity for CO conversions higher than 90%. Hence, for the
environmental application of the automotive emission control, it can completely eliminate the poisonous CO gas.
Keywords: Catalytic converter, perovskite, automotive emission, catalyst, citric acid method.

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