STRUCTURAL AND MORPHOLOGICAL PROPERTIES OF Ce1-xMxOy (M = Gd, La, Mg) SUPPORTS FOR THE CATALYSTS OF AUTOTHERMAL ETHANOL CONVERSION
M. A. Kerzhentsev1, E. V. Matus1, I. Z. Ismagilov1, V. A. Ushakov1, O. A. Stonkus1,2, T. V. Larina1, G. S. Kozlova3, P. Bharali4, Z. R. Ismagilov1,5
1Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
2Novosibirsk National Research State University, Novosibirsk, Russia
3Shared Research Center, Federal Research Center of Coal and Coal Chemistry, Siberian Branch, Russian Academy of Sciences, Kemerovo, Russia
4Tezpur University, Napaam, Tezpur Assam, India
5Institute of Coal Chemistry and Material Science, Federal Research Center of Coal and Coal Chemistry, Siberian Branch, Russian Academy of Sciences, Kemerovo, Russia
Keywords: диоксид церия, допирующие добавки, рентгенофазовый анализ, электронная микроскопия, электронная спектроскопия диффузного отражения, наноматериалы, cerium dioxide, dopants, powder XRD analysis, electron microscopy, electron spectroscopy of diffuse reflectance, nanomaterials
Abstract
A complex of physicochemical methods (powder XRD analysis, transmission and scanning electron microscopy, electron spectroscopy of diffuse reflectance, low-temperature nitrogen adsorption) is used for the comparative study of structural and morphological properties of oxide supports Ce1- x M x O y (M = Gd, La, Mg; x = 0-0.5; 1.5 ≤ y ≤ 2.0) for catalysts for the autothermal reforming of bioethanol to a hydrogen-bearing gas. It is shown that Ce1-x M x O y samples synthesized by the method of ester polymer precursors are mesoporous materials being the homogenous substitutional solid solutions with the fluorite-type cubic structure. The structural and textural properties of the Ce1-x M x O y materials are regulated by varying the type of the dopant cation (M = Gd, La, Mg), the molar ratio M/Ce (0, 0.1, 0.25, 1), and heat treatment conditions (temperature 300-800 °C; duration 4-24 h). The relationship between the synthesis parameters and the characteristics of the Ce1-x M x O y materials is found.
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