KFU. Card publication. 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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STABILIZING EFFECT OF α-CR2O3 ON HIGHLY ACTIVE PHASES AND CATALYTIC PERFORMANCE OF A CHROMIUM ALUMINA CATALYST IN THE PROCESS OF ISOBUTANE DEHYDROGENATION

Form of presentation

Articles in international journals and collections

Year of publication

2021

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Authors, employees of KFU

Boreckaya Avgustina Vadimovna, author

Egorova Svetlana Robertovna, author

Lamberov Aleksandr Adolfovich, author

Laskin Artem Igorevich, author

Tuktarov Rustem Ramilovich, author

Authors, students KFU

Gizyatullov Ramil Nailevich, author

Bibliographic description in the original language

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)

Annotation

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

Keywords

Isobutane dehydrogenation, CrOx/Al2O3 catalyst, α-Cr2O3, Amorphous Cr2O3, Chromium particles

The name of the journal

Molecular Catalysis

On-line resource for training course

http://dspace.kpfu.ru/xmlui/bitstream/handle/net/163800/1_s2.0_S2468823121002273_main.pdf?sequence=1&isAllowed=y

Please use this ID to quote from or refer to the card

https://repository.kpfu.ru/eng/?p_id=253158&p_lang=2

Resource files

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Full metadata record

Field DC	Value	Language
dc.contributor.author	Boreckaya Avgustina Vadimovna	ru_RU
dc.contributor.author	Egorova Svetlana Robertovna	ru_RU
dc.contributor.author	Lamberov Aleksandr Adolfovich	ru_RU
dc.contributor.author	Laskin Artem Igorevich	ru_RU
dc.contributor.author	Tuktarov Rustem Ramilovich	ru_RU
dc.contributor.author	Gizyatullov Ramil Nailevich	ru_RU
dc.date.accessioned	2021-01-01T00:00:00Z	ru_RU
dc.date.available	2021-01-01T00:00:00Z	ru_RU
dc.date.issued	2021	ru_RU
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)	ru_RU
dc.identifier.uri	https://repository.kpfu.ru/eng/?p_id=253158&p_lang=2	ru_RU
dc.description.abstract	Molecular Catalysis	ru_RU
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	ru_RU
dc.language.iso	ru	ru_RU
dc.subject	Isobutane dehydrogenation	ru_RU
dc.subject	CrOx/Al2O3 catalyst	ru_RU
dc.subject	α-Cr2O3	ru_RU
dc.subject	Amorphous Cr2O3	ru_RU
dc.subject	Chromium particles	ru_RU
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	ru_RU
dc.type	Articles in international journals and collections	ru_RU