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Title

Experimental and Kinetic Study of CO Oxidation Over LaFe1-xCuxO3 (x=0, 0. 2, 0. 4, 0. 6) Perovskite-Type Oxides (Research note)

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 Start Page 91 | End Page 102

Abstract

 In this paper, catalytic oxidation of CO over LaFe1-xCuxO3 (x= 0, 0. 2, 0. 4, 0. 6) Perovskite-type oxides was investigated. The catalysts were synthesized by sol-gel method and characterized by XRD, BET, FT-IR, H2-TPR, and SEM methods. The catalytic activity of catalysts was tested in catalytic oxidation of CO. XRD patterns confirmed the synthesized Perovskites to be single-phase Perovskite-type oxides. The synthesized Perovskite catalysts show high activity in the range of reaction temperature (50-300 º C). The substitution of Cu in B-site of the Perovskite catalysts enhanced their catalytic activity for CO Oxidation. Among different synthesized Perovskite catalysts, LaFe0. 6Cu0. 4O3 has the highest activity: nearly complete elimination of CO was achieved at 275 º C with this catalyst. Kinetic studies for CO Oxidation were performed based on power law and Mars-van Krevelen mechanisms. According to Kinetic calculations, the most probable mechanism is the MKV-D (dissociative adsorption of oxygen) which can predict the experimental data with correlation coefficient of R2 > 0. 995.

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