Commercial Aluminum Hydroxides. Part 1: Phase Composition and Textural Characteristics of Commercial Aluminum Hydroxides/Oxides

IF 0.7 Q4 ENGINEERING, CHEMICAL

Catalysis in Industry Pub Date : 2025-01-27 DOI:10.1134/S207005042470020X

A. P. Bebyakina, M. I. Farid, A. V. Boretskaya, S. R. Egorova, A. A. Lamberov

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Abstract

Aluminum oxides are the most common component used in the design of heterogeneous catalysts of oil refining and petrochemistry. The optimum characteristics of aluminum oxide supports and catalysts (e.g., specific surface area, pore size, and phase and impurity compositions) correspond to the type of hydrocarbon feedstocks and technological process. In light of the trend toward import substitution, it is becoming ever more relevant to study the market for domestic producers of aluminum hydroxide feedstocks used in the synthesis of aluminum oxides. In this work, domestic commercial samples of aluminum hydroxides are investigated via X-ray diffraction, simultaneous thermogravimetry/differential scanning calorimetry, low-temperature nitrogen adsorption, and elemental analysis. It is established that the objects of study are most often inhomogeneous in phase and contain iron, silicon, and calcium impurities. The effect of degree of crystallinity and the sizes of coherent scattering regions in aluminum hydroxides with a predominantly boehmite structure (and in some cases, aluminum hydroxides containing bayerite) on the textural characteristics of synthesized aluminum oxides is demonstrated.

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来源期刊

Catalysis in Industry ENGINEERING, CHEMICAL-

CiteScore

1.30

自引率

14.30%

发文量

期刊介绍： The journal covers the following topical areas: Analysis of specific industrial catalytic processes: Production and use of catalysts in branches of industry: chemical, petrochemical, oil-refining, pharmaceutical, organic synthesis, fuel-energetic industries, environment protection, biocatalysis; technology of industrial catalytic processes (generalization of practical experience, improvements, and modernization); technology of catalysts production, raw materials and equipment; control of catalysts quality; starting, reduction, passivation, discharge, storage of catalysts; catalytic reactors.Theoretical foundations of industrial catalysis and technologies: Research, studies, and concepts : search for and development of new catalysts and new types of supports, formation of active components, and mechanochemistry in catalysis; comprehensive studies of work-out catalysts and analysis of deactivation mechanisms; studies of the catalytic process at different scale levels (laboratory, pilot plant, industrial); kinetics of industrial and newly developed catalytic processes and development of kinetic models; nonlinear dynamics and nonlinear phenomena in catalysis: multiplicity of stationary states, stepwise changes in regimes, etc. Advances in catalysis: Catalysis and gas chemistry; catalysis and new energy technologies; biocatalysis; nanocatalysis; catalysis and new construction materials.History of the development of industrial catalysis.