| Summary: | The results of carbon dioxide reforming of CH<sub>4</sub> (model biogas) on catalysts prepared by solution combustion synthesis (SCS) and impregnation of moisture capacity methods are presented. Investigation of the activity of catalysts synthesized from initial mixtures of Co(NO<sub>3</sub>)<sub>2</sub>-Al(NO<sub>3</sub>)<sub>3</sub>-urea of different compositions was carried out for the production of synthesis-gas, and SCS and traditional incipient wetness impregnation catalyst preparation methods were compared. The methane conversion reached 100%, and the conversion of CO<sub>2</sub> increased to 86.2%, while the yield of H<sub>2</sub> and CO was 99.2% and 85.4%, respectively, at 900 °C. It was found that CoAl<sub>2</sub>O<sub>4</sub> spinel formation was due to substitution of Al<sup>3+</sup> with Co<sup>2+</sup> cations. Consequently, CoAl<sub>2</sub>O<sub>4</sub> lattice parameters increased, since the ionic radius of Al<sup>3+</sup> (0.51 Å) less than Cο<sup>2+</sup> (0.72 Å). Advantages of SCS catalysts in comparison with catalysts prepared by the traditional incipient wetness impregnation method in dry reforming of methane were shown. The aim of this work is to develop a new catalyst for the conversion of model biogas into synthesis gas, which will contribute to the organization of a new environmentally friendly, energy-saving production in the future.
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