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Effect of Silica on the Stability of the Nanostructure and Texture of Fine-Particle Alumina Full article

Journal Kinetics and Catalysis
ISSN: 0023-1584 , E-ISSN: 1608-3210
Output data Year: 2012, Volume: 53, Number: 1, Pages: 125-136 Pages count : 12 DOI: 10.1134/S0023158412010120
Tags Calcination Temperature; High Specific Surface Area; Boehmite; Aluminum Oxide Sample; Extensive Defect
Authors Shutilov A.A. 1,2 , Zenkovets G.A. 1,2 , Tsybulya S.V. 1,2 , Gavrilov V.Yu. 1
Affiliations
1 Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090 Russia
2 Novosibirsk State University, Novosibirsk, 630090 Russia

Funding (2)

1 Siberian Branch of the Russian Academy of Sciences 36
2 The Ministry of Education and Science of the Russian Federation 2.1.1./10165

Abstract: The effect of the modification of aluminum oxide with silicon oxide on the stability of fine-particle gamma- and delta-Al2O3 phases upon heat treatment in the wide temperature range of 550-1500 degrees C was studied. It was found that the gamma- and delta-Al2O3 phases modified with silica are thermally stable up to higher temperatures than pure aluminum oxide. This is due to changes in the real structure of the modified samples, specifically, an increase in the concentration of extensive defects stabilized by hydroxyl groups bound to not only aluminum atoms but also silicon atoms. It is likely that Si-OH groups, which are thermally more stable than Al-OH groups, stabilize the microstructure of gamma- and delta-Al2O3 to higher temperatures, as compared with aluminum oxide containing no additives. Simultaneously, an increase in the thermal stability of the modified samples is accompanied by the retention of a high specific surface area and a developed pore structure at higher treatment temperatures.
Cite: Shutilov A.A. , Zenkovets G.A. , Tsybulya S.V. , Gavrilov V.Y.
Effect of Silica on the Stability of the Nanostructure and Texture of Fine-Particle Alumina
Kinetics and Catalysis. 2012. V.53. N1. P.125-136. DOI: 10.1134/S0023158412010120 WOS Scopus РИНЦ ANCAN OpenAlex
Original: Шутилов А.А. , Зенковец Г.А. , Цыбуля С.В. , Гаврилов В.Ю.
Влияние добавок оксида кремния на стабильность наноструктуры и текстуры высокодисперсных модификаций оксида алюминия
Кинетика и катализ. 2012. Т.53. №1. С.128-140. РИНЦ
Dates:
Submitted: Mar 11, 2011
Published print: Feb 1, 2012
Published online: Feb 14, 2012
Identifiers:
Web of science: WOS:000302314100015
Scopus: 2-s2.0-84861140477
Elibrary: 17985500
Chemical Abstracts: 2012:215005
Chemical Abstracts (print): 157:475393
OpenAlex: W2064644319
Citing:
DB Citing
Web of science 15
Scopus 13
Elibrary 15
OpenAlex 13
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