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Title of article :
Hydrogenation of methyl benzoate to benzaldehyde over manganese oxide catalysts prepared from Mg/Mn/Al hydrotalcite-like compounds Original Research Article
Author/Authors :
Aimin Chen، نويسنده , , Hualong Xu، نويسنده , , Yinghong Yue، نويسنده , , Weiming Hua، نويسنده , , Wei Shen، نويسنده , , Zi Gao، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2004
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Abstract :
Mn–Al and Mg–Mn–Al hydrotalcite-like compounds (HTlcs) were synthesized by a coprecipitation method. The activity of the calcined HTlcs for hydrogenation of methyl benzoate to benzaldehyde was tested. The effects of Mn/Al and Mg/Mn ratio, preparation and reaction conditions, and potassium promoter on the catalytic performance of the catalysts were investigated. The prepared catalysts give better performance than conventional 10% Mn/γ-Al2O3 catalyst. The conversion of methyl benzoate and selectivity to benzaldehyde on 3% K/Mg0.2Mn1.8Al1 catalyst at 390 °C are 90.0 and 88.0%, respectively. XRD, TPR and CO2-TPD studies show that the redox and basic properties of the catalysts play important roles in the reaction. A suitable degree of reduction and a small number of basic sites on the catalyst lead to a high activity and selectivity to benzaldehyde.
Keywords :
Hydrotalcite-like compounds , Manganese oxide catalyst , Methyl benzoate , Hydrogenation , Benzaldehyde
Journal title :
Applied Catalysis A:General
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