CO2 Hydrogenation on Carbides Formed in situ on Carbon‐Supported Iron‐Based Catalysts in High‐Density Supercritical Medium

Bogdan, T.V.; Koklin, A.E.; Mishanin, I.I.; Chernavsky, P.A.; Pankratov, D.A.; Kim, O.A.; Bogdan, V.

Авторы: Bogdan Tatiana V., Koklin Aleksey E., Mishanin Igor I., Chernavsky Petr A., Pankratov Denis A., Kim Ok-sun A., Bogdan Viktor
Журнал: ChemPlusChem
Год издания: 2024
Издательство: WILEY-VCH
Местоположение издательства: INC, 605 THIRD AVE, NEW YORK, USA, NY, 10158-0012
Первая страница: 1
Последняя страница: 14
Номер статьи: e202400327
DOI: 10.1002/cplu.202400327
Аннотация: CO2 conversion via hydrogenation on iron-basedcatalysts on non-carbon supports produces mainly CO or methane by the Sabatier reaction, while the formation of C2+ hydrocarbons is of greatest interest. CxHy production from CO2 may be considered as a two-step process with the initial formation of carbon monoxide by the reverse water gas shift reaction followed by the Fischer-Tropsch synthesis (FTS). In the present work CO2 hydrogenation over iron-based catalysts (Fe, FeCr,FeK) deposited on a carbon carrier has been studied. The catalyst structure has been investigated by powder XRD, TEM, XPS,Mössbauer spectroscopy and in situ magnetometry. Spinel-type oxide phases (magnetite Fe3O4; maggemite γ-Fe2O3, and, in the case of FeCr/C catalyst, iron chromite Fe1+xCr2-xO4) are formed on the catalysts, and they contribute exclusively to the CO production. Iron carbides, active in FTS, are formed on Fe- and FeK-catalysts during pre-activation in reducing environment and then during the reaction. The reaction over the 20Fe1K/C catalyst in supercritical high-density CO2/H2 substrate (400°C, 8.5 MPa) leads to 72% selectivity for C1-C12+ hydrocarbons (alkanes and alkenes). Underthe same conditions, iron carbides do not form on the FeCr/C catalysts, and CO2 hydrogenation results in the CO formation withthe selectivity of 90–100%.
Добавил в систему: Богдан Татьяна Вениаминовна

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CO2 Hydrogenation on Carbides Formed in situ on Carbon‐Supported Iron‐Based Catalysts in High‐Density Supercritical Mediumстатья

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