Author(s)

Natalia Miniajluk^1,2*, Janusz Trawczyński¹, Mirosław Zawadzki², Włodzimierz Tylus³

¹Division of Chemistry and Technology of Fuels, Wroclaw University of Technology, Wrocław, Poland.
²Institute of Low Temperature and Structural Research Polish Academy of Sciences, Wrocław, Poland.
³Institute of Technology of Inorganic and Mineral Fertilizers, Wroclaw University of Technology, Wrocław, Poland.

The effect of the preparation method on the properties of LaMnO₃ and La_0.8Sr_0.2MnO₃ perovskite was studied. Materials were prepared by four methods: sol-gel, chemical combustion, solvothermal and spray pyrolysis and characterized. The effect of the synthesis method on the texture, acid-base character of the surface, reducibility with hydrogen, oxygen desorption, surface composition and catalytic activity for combustion of lean methane was studied. It was found that synthesis method affects physicochemical properties of obtained materials-solvothermally produced materials exhibit well-developed surface area, presence of reactive oxygen species on surface and high catalytic activity for CH₄ combustion. Generally, LaMnO₃ and La_0.8Sr_0.2MnO₃ perovskites show catalytic activity for lean CH₄ combustion comparable or higher than the activity of 0.5 wt.% Pt/Al₂O₃ but lower than 1 wt.% Pd/Al₂O₃.

Perovskite, Different Synthesis Method, Lean Methane Combustion, Combustion Rate, Ventilation Air Methane

Miniajluk, N. , Trawczyński, J. , Zawadzki, M. and Tylus, W. (2018) LaMnO₃ (La_0.8Sr_0.2MnO₃) Perovskites for Lean Methane Combustion: Effect of Synthesis Method. Advances in Materials Physics and Chemistry, 8, 193-215. doi: 10.4236/ampc.2018.84013.