Activity and stability of cobalt-manganese catalysts in the process of methane flameless combustion

Marek Rotko, Vladyslav Redko, Witold Zawadzki

Abstract


Oxide cobalt-manganese catalysts with different contents of cobalt and manganese, as well as pure cobalt and manganese catalysts have been tested in the process of methane flameless combustion (complete catalytic oxidation). The X-ray diffraction and X-ray photoelectron spectroscopy results showed that cobalt-manganese catalysts mainly composed of the spinel phase of Co3O4, Mn2CoO4 and/orMnCo2O4. The highest initial activity was presented bythe cobalt-manganese catalyst withahigh cobalt content.However, after 50-hours stability test the highest activity was presented by the cobalt-manganese catalyst with Co and Mn content close to the equimolar value.


Keywords


Methane flameless combustion; Cobalt-manganese catalyst; Complete methane oxidation

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DOI: http://dx.doi.org/10.17951/aa.2019.74.2.89-100
Date of publication: 2020-07-15 10:58:40
Date of submission: 2020-03-27 21:18:43


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