Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Ethanol dehydrogenation to acetaldehyde over Co@N-doped carbon. / Chernov, Aleksey N.; Astrakova, Tatiana V.; Koltunov, Konstantin Yu и др.
в: Catalysts, Том 11, № 11, 1411, 11.2021.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Ethanol dehydrogenation to acetaldehyde over Co@N-doped carbon
AU - Chernov, Aleksey N.
AU - Astrakova, Tatiana V.
AU - Koltunov, Konstantin Yu
AU - Sobolev, Vladimir I.
N1 - Funding Information: Funding: This work was supported by the Ministry of Science and Higher Education of the Russian Federation within the governmental order for Boreskov Institute of Catalysis (project AAAA-A21-121011390008-4). Publisher Copyright: © 2021 by the authors. Licensee MDPI, Basel, Switzerland.
PY - 2021/11
Y1 - 2021/11
N2 - Cobalt and nitrogen co-doped carbon materials (Co@CN) have recently attracted significant attention as highly efficient noble-metal-free catalysts exhibiting a large application range. In a similar research interest, and taking into account the ever-increasing importance of bioethanol as a renewable raw material, here, we report the results on ethanol dehydrogenation to acetaldehyde over Co@NC catalysts. The catalyst samples were synthesized by a variety of affordable techniques, ensuring generation of various types of Co species incorporated in carbon, such as subnanosized cobalt sites and nano-sized particles of metallic cobalt and cobalt oxides. The catalytic activity was tested under both oxidative and non-oxidative gas-phase conditions at 200–450 °C using a fixed-bed flow reactor. The non-oxidative conditions proved to be much more preferable for the target reaction, competing, however, with ethanol dehydration to ethylene. Under specified reaction conditions, ethanol conversion achieved a level of 66% with 84% selectivity to acetaldehyde at 400 °C. The presence of molecular oxygen in the feed led mainly to deep oxidation of ethanol to COx, giving acetaldehyde in a comparatively low yield. The potential contribution of carbon itself and supported cobalt forms to the observed reaction pathways is discussed.
AB - Cobalt and nitrogen co-doped carbon materials (Co@CN) have recently attracted significant attention as highly efficient noble-metal-free catalysts exhibiting a large application range. In a similar research interest, and taking into account the ever-increasing importance of bioethanol as a renewable raw material, here, we report the results on ethanol dehydrogenation to acetaldehyde over Co@NC catalysts. The catalyst samples were synthesized by a variety of affordable techniques, ensuring generation of various types of Co species incorporated in carbon, such as subnanosized cobalt sites and nano-sized particles of metallic cobalt and cobalt oxides. The catalytic activity was tested under both oxidative and non-oxidative gas-phase conditions at 200–450 °C using a fixed-bed flow reactor. The non-oxidative conditions proved to be much more preferable for the target reaction, competing, however, with ethanol dehydration to ethylene. Under specified reaction conditions, ethanol conversion achieved a level of 66% with 84% selectivity to acetaldehyde at 400 °C. The presence of molecular oxygen in the feed led mainly to deep oxidation of ethanol to COx, giving acetaldehyde in a comparatively low yield. The potential contribution of carbon itself and supported cobalt forms to the observed reaction pathways is discussed.
KW - Acetaldehyde
KW - Cobalt-nitrogen-carbon catalyst
KW - Dehy-drogenation
KW - Ethanol conversion
KW - Heterogeneous catalysis
UR - http://www.scopus.com/inward/record.url?scp=85119333002&partnerID=8YFLogxK
U2 - 10.3390/catal11111411
DO - 10.3390/catal11111411
M3 - Article
AN - SCOPUS:85119333002
VL - 11
JO - Catalysts
JF - Catalysts
SN - 2073-4344
IS - 11
M1 - 1411
ER -
ID: 34706087