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Stabilizing effect of α-Cr2O3 on highly active phases and catalytic performance of a chromium alumina catalyst in the process of isobutane dehydrogenation

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dc.contributor Казанский федеральный университет
dc.contributor.author Egorova Svetlana Robertovna
dc.contributor.author Tuktarov Rustem Ramilovich
dc.contributor.author Boretskaya Avgustina Vadimovna
dc.contributor.author Laskin Artem Igorevich
dc.contributor.author Gizyatullov Ramil Nailevich
dc.contributor.author Lamberov Aleksandr Adolfovich
dc.date.accessioned 2021-05-31T07:41:09Z
dc.date.available 2021-05-31T07:41:09Z
dc.date.issued 2021
dc.identifier.citation Egorova, S.R. Stabilizing effect of α-Cr2O3 on highly active phases and catalytic performance of a chromium alumina catalyst in the process of isobutane dehydrogenation / S.R. Egorova, R.R. Tuktarov, A.V. Boretskaya, A.I. Laskin, R.N. Gizyatullov, A.A. Lamberov // Molecular Catalysis. - 2021. - V.509. - P.111610 (doi.org/10.1016/j.mcat.2021.111610)
dc.identifier.uri https://dspace.kpfu.ru/xmlui/handle/net/163800
dc.description.abstract he demand for C3-C5 olefins is constantly growing, that is why it is important to improve the performance of catalysts for dehydrogenation of light alkanes. The study regards the influence of the supports porous system, the contribution of α-Cr2O3 particles to the state of the active phase and the catalytic performance of the chromiaalumina catalysts in the isobutane dehydrogenation reaction. The catalysts were synthesized by impregnating the support with chromic acid. The supports and the catalysts were studied by the following techniques: lowtemperature nitrogen adsorption, temperature-programmed desorption and reduction; UV-Vis- and Ramanspectroscopy, X-ray phase and X-ray fluorescence analyses. It was found that crystals of α-Cr2O3 are formed on a support with 56 m2/g specific surface area and 7.1% (m/m) chromium content, that contributes to stabilization of the particles of highly active phases of amorphous Cr2O3 and polychromates and catalytic performance. Meanwhile, no α-Cr2O3 particles are formed on a support with a 103 m2/g specific surface area and 7.4% (m/m) chromium content. Therefore, in the course of 54 regeneration reactions cycles, the rates of isobutylene formation and isobutylene selectivity are significantly reduced due to agglomeration of amorphous Cr2O3 particles, formation of di-, tri- chromates, and migration of part of chromium into the support structure
dc.language.iso en
dc.relation.ispartofseries Molecular Catalysis
dc.rights открытый доступ
dc.subject Isobutane dehydrogenation
dc.subject CrOx/Al2O3 catalyst
dc.subject α-Cr2O3
dc.subject Amorphous Cr2O3
dc.subject Chromium particles
dc.subject.other Химия
dc.title Stabilizing effect of α-Cr2O3 on highly active phases and catalytic performance of a chromium alumina catalyst in the process of isobutane dehydrogenation
dc.type Article
dc.contributor.org Химический институт им. А.М. Бутлерова
dc.description.pages 111610-111610
dc.relation.ispartofseries-volume 509
dc.pub-id 253158
dc.identifier.doi 10.1016/j.mcat.2021.111610


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