Effect of Steam–Air Treatment of Alumina–Chromia Dehydrogenation Catalysts on Their Physicochemical and Catalytic Characteristics Full article
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Russian Journal of Applied Chemistry
ISSN: 1070-4272 , E-ISSN: 1608-3296 |
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| Output data | Year: 2021, Volume: 94, Number: 9, Pages: 1283–1291 Pages count : 9 DOI: 10.1134/S1070427221090111 | ||
| Tags | alumina–chromia catalyst; steam–air treatment; dehydrogenation; coke; Cr(VI) | ||
| Authors |
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| Affiliations |
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Funding (1)
| 1 | Ministry of Science and Higher Education of the Russian Federation | 0239-2021-0006 |
Abstract:
The effect that calcination of an alumina–chromia catalyst containing 13 wt % Cr with additions of Na+ and Zr4+ in an air–water vapor atmosphere (from 0 to 80 vol % water vapor) at 750°С and a pressure of 1 bar exerts on the physicochemical properties of the catalyst and its activity in n-butane dehydrogenation was studied. The steam treatment leads to a slight decrease in the specific surface area (by up to 10%), partial decomposition of Cr(VI) compounds (up to 60%), and Cr2O3 crystallization. The catalytic activity decreases with an increase in the water vapor : air ratio. Low water vapor concentration (10 vol %) favors a significant decrease in the amount of the coke formed (by 60%) without significantly affecting the yield of alkenes. Thus, introduction of water vapor into the calcination atmosphere allows control of the Cr(VI) amount and catalyst selectivity.
Cite:
Nazimov D.A.
, Klimov O.V.
, Saiko A.V.
, Noskov A.S.
Effect of Steam–Air Treatment of Alumina–Chromia Dehydrogenation Catalysts on Their Physicochemical and Catalytic Characteristics
Russian Journal of Applied Chemistry. 2021. V.94. N9. P.1283–1291. DOI: 10.1134/S1070427221090111 WOS Scopus РИНЦ ANCAN OpenAlex
Effect of Steam–Air Treatment of Alumina–Chromia Dehydrogenation Catalysts on Their Physicochemical and Catalytic Characteristics
Russian Journal of Applied Chemistry. 2021. V.94. N9. P.1283–1291. DOI: 10.1134/S1070427221090111 WOS Scopus РИНЦ ANCAN OpenAlex
Original:
Назимов Д.А.
, Климов О.В.
, Сайко А.В.
, Носков А.С.
Исследование влияния паровоздушной обработки алюмохромовых катализаторов дегидрирования на их физико-химические и каталитические характеристики
Журнал прикладной химии. 2021. Т.94. №9. С.1195-1203. DOI: 10.31857/S0044461821090097 РИНЦ OpenAlex
Исследование влияния паровоздушной обработки алюмохромовых катализаторов дегидрирования на их физико-химические и каталитические характеристики
Журнал прикладной химии. 2021. Т.94. №9. С.1195-1203. DOI: 10.31857/S0044461821090097 РИНЦ OpenAlex
Dates:
| Submitted: | Feb 17, 2021 |
| Published print: | Sep 1, 2021 |
| Accepted: | Oct 22, 2021 |
| Published online: | Dec 27, 2021 |
Identifiers:
| Web of science: | WOS:000734333800011 |
| Scopus: | 2-s2.0-85121701831 |
| Elibrary: | 47545280 |
| Chemical Abstracts: | 2021:2831192 |
| Chemical Abstracts (print): | 179:51040 |
| OpenAlex: | W4200466142 |