Kinetic study of the combustion of ethyl methyl ketone over MnxOy
Keywords:
Kinetic modeling, MEK combustion, Mn oxide-based catalystAbstract
A kinetic model for the combustion process of MEK (methyl ethyl ketone) over MnxOy has been developed. The catalyst has been prepared by precipitation method from Mn(NO3)2.xH2O and NH4OH 30 % solution followed by calcination at 350 °C for 3 h. Kinetic experiments have been carried out in a fixed bed reactor operating under quasi differential conditions. Different models for the series-parallel reaction network have been proposed, ranging from simple power law model to mechanistic approaches. It has been found that a Langmuir-Hinshelwood mechanism with selective adsorption of CO over the catalyst surface fits reasonably quite well the experimental results obtained for MEK, CO and CO2 concentrations obtained at the outlet of reactor in the studied condition range. Moreover, the kinetic parameters so obtained are able to predict the performance of a fixed bed reactor.
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