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Sintered Fe/CNT framework catalysts for CO2 hydrogenation into hydrocarbons Full article

Journal Carbon
ISSN: 0008-6223 , E-ISSN: 1873-3891
Output data Year: 2020, Volume: 168, Pages: 475-484 Pages count : 10 DOI: 10.1016/j.carbon.2020.06.067
Authors Chernyak Sergei A. 1 , Ivanov Anton S. 1 , Stolbov Dmitrii N. 1,2 , Maksimov Sergey V. 1 , Maslakov Konstantin I. 1 , Chernavskii Petr A. 1,3 , Pokusaeva Yana A. 3 , Koklin Aleksey E. 3 , Bogdan Victor I. 1,3 , Savilov Serguei V. 1
Affiliations
1 Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1-3, Moscow, 119991, Russia
2 Ivanovo State University, Nanomaterials Research Institute, Ermak str. 37/7, 153025, Ivanovo, Russia
3 N.D. Zelinsky Institute of Organic Chemistry Russian Academy of Sciences, Leninsky prosp 47, 119991, Moscow, Russia

Abstract: Because of its contribution to greenhouse effect, carbon dioxide conversion to valuable chemicals is one of the most challenging issues facing the modern world. A new type of iron catalysts of CO2 hydrogenation into hydrocarbons was synthesized by spark plasma sintering of carbon nanotubes decorated with iron oxide nanoparticles. This treatment produced carbon-encapsulated iron nanocrystals embedded in a dense framework of CNTs. The sintered catalysts were tested without pre-reduction in CO2 hydrogenation under supercritical conditions (350 °C, 8.5 MPa) and showed high specific activities of 5.4–12.2 molCO2gFe−1s−1 and promising C2+ selectivities of 40–50 mol.% at rather low H2:CO2 ratios of 1 and 2. The high efficiency of the catalysts was attributed to the stabilization of metal nanoparticles by carbon shells and increased density of CNT support, which led to higher degree of metal – support interaction and intensified carbidization and CO activation.
Cite: Chernyak S.A. , Ivanov A.S. , Stolbov D.N. , Maksimov S.V. , Maslakov K.I. , Chernavskii P.A. , Pokusaeva Y.A. , Koklin A.E. , Bogdan V.I. , Savilov S.V.
Sintered Fe/CNT framework catalysts for CO2 hydrogenation into hydrocarbons
Carbon. 2020. V.168. P.475-484. DOI: 10.1016/j.carbon.2020.06.067 WOS Scopus OpenAlex
Identifiers:
≡ Web of science: WOS:000565904500005
≡ Scopus: 2-s2.0-85088913201
≡ OpenAlex: W3037891929
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