Catalytic oxidation of ethyl acetate over La-Co and La-Cu oxides
作者： X. Chen , S.A.C. Carabineiro , P.B. Tavares , J.J.M. Órfão , M.F.R. Pereira
DOI: 10.1016/J.JECE.2014.01.003
关键词: Thermogravimetry 、 Inorganic chemistry 、 Temperature-programmed reduction 、 Catalytic oxidation 、 Mixed oxide 、 Differential scanning calorimetry 、 Ethyl acetate 、 Catalysis 、 Transition metal 、 Chemistry
摘要: Abstract Lanthanum-containing mixed oxides (La-Co and La-Cu) were synthesized by several methods: exotemplating, evaporation, glycine-nitrate glycine-nitrate-exotemplating. Samples characterized thermogravimetry differential scanning calorimetry, N2 adsorption, temperature programmed reduction, electron microscopy X-ray diffraction. The materials obtained tested as catalysts for ethyl acetate oxidation, a model volatile organic compound. La-Cu samples showed poor catalytic performance, but La-Co much more active than the individual components. Catalytic activity seems to be mainly determined easiness of reduction catalysts, which is related availability oxygen from lattice. Catalysts containing Co or Cu in excess La (on molar base) corresponding consisting equal amounts transition metal. prepared evaporation method those same ratio. methods calcined at 600 °C had better performance 300 °C. most sample found this study was oxide glycine nitrate 600 °C, 100% conversion H2O CO2 being achieved 230 °C.
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