Kinetics of soot oxidation catalyzed by CuMoO4
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Abstract
The kinetics of the catalytic soot combustion was studied for each identified stage of structural transformations of the CuMoO4 catalyst. The formation of the catalytically active phase Cu4−xMo3O12 during the process through the redox transformation of the catalyst is controlled by the reduction of CuMoO4 on the catalyst surface by the soot. The oxidation of the soot by the active phase of the catalyst could be described by the Avrami-Erofeev equation for the three-dimensional growth of randomly formed combustion centers. The quantity of the Cu4−xMo3O12 molybdate on the catalyst surface remains constant throughout the catalytic reaction. A macrokinetic model equation describing dependence of the total reaction rate from the rates of redox catalyst transformation and catalytic soot oxidation steps was obtained.
Keywords
Soot oxidation CuMoO4 catalyst Redox transformations Macrokinetic modelReferences
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