Окисление метана на полиоксидных катализаторах

К. Досумов; Г.Е. Ергазиева; Л.К. Мылтыкбаева; У. Суюнбаев; Н. Асанов

doi:10.18321/

Authors

K. Dossumov Institute of Combustion Problems, Bogenbai Batyr st. 172, 050012, Almaty, Kazakhstan
G.Y. Yergazyieva Institute of Combustion Problems, Bogenbai Batyr st. 172, 050012, Almaty, Kazakhstan
L.K. Myltykbayeva Institute of Combustion Problems, Bogenbai Batyr st. 172, 050012, Almaty, Kazakhstan
U. Suyunbayev Institute of Combustion Problems, Bogenbai Batyr st. 172, 050012, Almaty, Kazakhstan
N. Asanov Institute of Combustion Problems, Bogenbai Batyr st. 172, 050012, Almaty, Kazakhstan

DOI:

https://doi.org/10.18321/

Keywords:

methane, catalysts, synthesis gas, conversion, temperature

Abstract

The effect of modifying additives of copper, neodymium and molybdenum on acidity and dispersity of nickel catalyst was studied by temperature-programmed desorption of ammonia and scanning electron microscopy methods. Their activity in the reaction of partial oxidation of methane (POM) and dry reforming of methane (DRM) were measured. The NiCuNdMo/Al₂O₃HZSM-5 was found to be the best catalyst. The intro-duction of molybdenum into the composition of NiCuNd/Al₂O₃HZSM-5 catalyst was determined to increase general acidity of the catalyst from 26,71∙10^-4 to 29,46∙10^-4 mol / gКt, and also it increases the dispersion of the active phases of the catalysts surface. This data of change positively affects the activity of the catalyst in POM reaction, concentration of hydrogen in the reaction product compared with NiCuNd / Al₂O₃HZSM-5 increases from 60 to 70 vol.%. The investigation of the catalytic activity of NiCuNdМо/Al₂O₃HZSM-5 catalyst in the reaction of DRM have shown, that equilibrium yield of H₂ and CO is observed in the temperature range of 650-900 °C. The main product in the process of oxidative conversion of methane by oxygen is hydrogen, whereas in the process of oxidative conversion of methane by carbon dioxide synthesis gas is formed.

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