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Formation of Phases and Porous System in the Product of Hydrothermal Treatment of chi-Al2O3

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dc.contributor Казанский федеральный университет
dc.contributor.author Егорова Светлана Робертовна
dc.contributor.author Мухамедьярова Алия Наильевна
dc.contributor.author Нестерова Оксана Витальевна
dc.contributor.author Yuqing Zhang
dc.contributor.author Скибина Юлия Дмитриевна
dc.contributor.author Ламберов Александр Адольфович
dc.date.accessioned 2018-08-27T07:26:44Z
dc.date.available 2018-08-27T07:26:44Z
dc.date.issued 2018
dc.identifier.citation Egorova S.R. Formation of Phases and Porous System in the Product of Hydrothermal Treatment of chi-Al2O3 / S.R. Egorova, A.N. Mukhamedyarova, O.V. Nesterova, Yuqing Zhang, J.D. Skibina, A.A. Lamberov // Coatings. - 2018. Vol. 8. - Is. 30; doi:10.3390/coatings8010030
dc.identifier.uri https://dspace.kpfu.ru/xmlui/handle/net/131976
dc.description.abstract The presence of chi-Al2O3 resulting from thermal decomposition gibbsite as part of alumina catalysts is unfavorable because of its acid characteristics. One of the available techniques of chi-Al2O3 removal is crystallization under hydrothermal conditions into boehmite, which is a main precursor of active Al2O3. The influence of products of the hydrothermal treatment of chi-Al2O3 obtaining in result of thermal decomposition gibbsite under T = 150?200C, P = 0.5?1.5 MPa and pH = 4.0?9.2 were studied. The hydrothermal treatment products in these conditions are gibbsite and boehmite phases which are formed coincidently by parallel ways. In the alkaline medium at pH = 8.0?9.2 three-dimensional parallelepiped boehmite crystals with the edge length ) 200 nm are formed, at pH = 4.0 two-dimensional rhombic-shaped plates with thickness 20?100 nm and with the edge length ~80?500 nm are formed. Crystallization of coarse boehmite particles promotes the formation of large and closed mesoporous.
dc.language.iso ru
dc.relation.ispartofseries Coating
dc.rights только для КФУ
dc.subject alumina
dc.subject boehmite
dc.subject gibbsite
dc.subject hydrothermal treatment
dc.title Formation of Phases and Porous System in the Product of Hydrothermal Treatment of chi-Al2O3
dc.type Article
dc.contributor.org Химический институт им. А.М. Бутлерова
dc.description.pages
dc.relation.ispartofseries-issue 1
dc.relation.ispartofseries-volume 8
dc.pub-id 172870


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