Manganese Oxide Promoted LaCoO3 Nano-Perovskite for Oxidation of a Model Exhaust Gas

Farhanian Moghadam, S.; Malekzadeh, A.; Ghiasi, M.; Karimi, F.; Mortazavi, Y.; Khodadadi, A.

Manganese Oxide Promoted LaCoO3 Nano-Perovskite for Oxidation of a Model Exhaust Gas

Document Type : Full article

Authors

S. Farhanian Moghadam ¹

A. Malekzadeh ¹

M. Ghiasi ¹

F. Karimi ²

Y. Mortazavi ³

A. Khodadadi ³

¹ School of Chemistry, Damghan University (DU), Damghan, I. R. Iran

² School of Chemistry, Damghan University (DU), Damghan, I. R. Iran.

³ School of Chemical Engineering, University of Tehran, Tehran, I. R. Iran

Abstract

Catalysts with the formula of LaCoMnxO(3+‰), where x is 0.0, 0.2, 0.3 and 0.5 were studied for CO and C2H6 oxidation. Ethane was selected as a model for hydrocarbon combustion. Samples were prepared by the citrate method and calcined at 600oC for 8 h. Prepared catalysts were characterized by FT-IR, XRD, SEM, TEM, TPR and EDS analyses. Structural studies show that the manganese oxide addition up to 0.5 mol, i.e. 50%, has no effect on the LaCoO3 perovskite phase formation. Crystallite size of different phases, comprising perovskite and manganese oxide, was determined by the Scherrer equation. Addition of 0.3 mol manganese was observed to improve the catalytic property of the lanthanum cobaltite; oxidizes the CO and hydrocarbons at lower temperature.

Keywords

Mixed Oxides

LaCoO3

Manganese Oxide

CO Oxidation

Hydrocarbon Oxidation

Perovskite