Cobalt Supported on Carbonized MgAl2O4 Spinel as Efficient Catalyst for CO Hydrogenation

Cobalt Supported on Carbonized MgAl2O4 Spinel as Efficient Catalyst for CO Hydrogenation Full article

Journal

Catalysis Letters
ISSN: 1572-879X , E-ISSN: 1011-372X

Output data

Year: 2023, Volume: 153, Number: 12, Pages: 3678-3688 Pages count : 11 DOI: 10.1007/s10562-022-04260-4

Authors

Chernavskii Petr A. ^1,2 , Pankina Galina V. ¹ , Kazantsev Ruslan V. ² , Kharlanov Andrey N. ¹ , Panfilov Sergey A. ³ , Novakova Alla A. ³ , Eliseev Oleg L. ²

Affiliations

1	Department of Chemistry, Lomonosov Moscow State University, Moscow, Russia
2	N.D. Zelinsky Institute of Organic Chemistry, Moscow, Russia
3	Faculty of Physics, Lomonosov Moscow State University, Moscow, Russia

Hydrogenation of carbon monoxide (Fischer–Tropsch synthesis) is a promising route to ultraclean motor fuels, base oils and petrochemicals on the basis of non-petroleum feed such as natural gas, coal and biomass. Although cobalt-based industrial catalysts for this process are in operation for many years, they still need to be improved in terms of specific activity and selectivity to target hydrocarbons. This paper describes the effect of catalyst support coating with carbon on the formation of cobalt active phase and catalytic performance in CO hydrogenation. Carbonization of Mg–Al spinel was performed by impregnating with aqueous glucose solution followed by thermal treatment in inert atmosphere. Thus prepared carbonized material was used for cobalt deposition by incipient wetness impregnation method. The catalysts were characterized by N2 adsorption–desorption, scanning electron microscopy, thermoanalytical measurements combined with mass spectrometry of released gases, X-ray diffraction and in situ magnetic measurements during activation in H2 flow. Catalytic performance in Fischer–Tropsch synthesis was assessed at T = 210 °C, P = 20 bar. The size of Co3O4 crystallites in calcined catalysts and metallic cobalt in activated catalysts decreases with carbon content in the support. Cobalt precursor is reduced completely to metal within 2 h in typical activation conditions for FTS cobalt catalysts: H2 flow, 450 °C. Activity in CO hydrogenation decreases while selectivity to higher hydrocarbons increases with carbon content. High proportion of olefins in synthesized light hydrocarbons (> 65%) is a remarkable feature of the elaborated catalysts.

Chernavskii P.A. , Pankina G.V. , Kazantsev R.V. , Kharlanov A.N. , Panfilov S.A. , Novakova A.A. , Eliseev O.L.
Cobalt Supported on Carbonized MgAl2O4 Spinel as Efficient Catalyst for CO Hydrogenation
Catalysis Letters. 2023. V.153. N12. P.3678-3688. DOI: 10.1007/s10562-022-04260-4 WOS Scopus OpenAlex

Web of science:	WOS:000911954500001
Scopus:	2-s2.0-85145998563
OpenAlex:	W4315465218

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OpenAlex	1
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Web of science	1