Catalytic methane reforming into synthesis gas over developed composite materials prepared by combustion synthesis

Autor: G. Xanthopoulou, S.A. Tungatarova, K.A. Shorayeva, T.S. Baizhumanova, B.K. Massalimova, Gulnar Kaumenova, Konstantinos Karanasios, Manapkhan Zhumabek
Rok vydání: 2019
Předmět:
Zdroj: Reaction Kinetics, Mechanisms and Catalysis. 126:645-661
ISSN: 1878-5204
1878-5190
DOI: 10.1007/s11144-019-01541-9
Popis: In this work, the results of carbon dioxide reforming and partial oxidation of CH4 on the catalysts prepared by solution combustion synthesis (SCS) and impregnation of moisture capacity methods are presented. Investigation of the activity of catalysts produced from initial mixture of Co(NO3)2-Μg(NO3)2-H3BO3 and glycine/urea of different composition was carried out for the production of synthesis gas and comparison of carbon dioxide reforming and partial oxidation of methane. Co(ΝΟ3)2 + Mg(NO3)2 + H3BO3 catalyst containing glycine has a higher activity than the catalyst containing urea. The CH4 conversion reaches 54.6%, and the conversion of CO2 increases to 51.7%, while the yield of H2 and CO is 54.1% and 51.3%, respectively, at 900 °C. It was found that CoMg3O4 spinel formation is due to magnesium cations substitution of cobalt cations. Mg2+ ions are replaced by ions of Co2+, as a consequence CoMg3O4 lattice parameters increase, since the ionic radius of Mg2+ (0.66 A) less than Cο2+ (0.72 A). Some advantage of SCS catalysts in comparison with catalysts prepared by the traditional impregnation method in the processes of dry reforming and partial oxidation of methane was shown.
Databáze: OpenAIRE
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