Ethanol Dehydrogenation to Acetaldehyde over Co@N-Doped Carbon

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...

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Autores principales:	Aleksey N. Chernov, Tatiana V. Astrakova, Konstantin Yu. Koltunov, Vladimir I. Sobolev
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	cobalt-nitrogen-carbon catalyst heterogeneous catalysis ethanol conversion dehydrogenation acetaldehyde Chemical technology TP1-1185 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/4ef159c413094a2088e642ee5b22c730
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spelling	oai:doaj.org-article:4ef159c413094a2088e642ee5b22c7302021-11-25T17:06:59ZEthanol Dehydrogenation to Acetaldehyde over Co@N-Doped Carbon10.3390/catal111114112073-4344https://doaj.org/article/4ef159c413094a2088e642ee5b22c7302021-11-01T00:00:00Zhttps://www.mdpi.com/2073-4344/11/11/1411https://doaj.org/toc/2073-4344Cobalt 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 CO<sub>x</sub>, giving acetaldehyde in a comparatively low yield. The potential contribution of carbon itself and supported cobalt forms to the observed reaction pathways is discussed.Aleksey N. ChernovTatiana V. AstrakovaKonstantin Yu. KoltunovVladimir I. SobolevMDPI AGarticlecobalt-nitrogen-carbon catalystheterogeneous catalysisethanol conversiondehydrogenationacetaldehydeChemical technologyTP1-1185ChemistryQD1-999ENCatalysts, Vol 11, Iss 1411, p 1411 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	cobalt-nitrogen-carbon catalyst heterogeneous catalysis ethanol conversion dehydrogenation acetaldehyde Chemical technology TP1-1185 Chemistry QD1-999
spellingShingle	cobalt-nitrogen-carbon catalyst heterogeneous catalysis ethanol conversion dehydrogenation acetaldehyde Chemical technology TP1-1185 Chemistry QD1-999 Aleksey N. Chernov Tatiana V. Astrakova Konstantin Yu. Koltunov Vladimir I. Sobolev Ethanol Dehydrogenation to Acetaldehyde over Co@N-Doped Carbon
description	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 CO<sub>x</sub>, giving acetaldehyde in a comparatively low yield. The potential contribution of carbon itself and supported cobalt forms to the observed reaction pathways is discussed.
format	article
author	Aleksey N. Chernov Tatiana V. Astrakova Konstantin Yu. Koltunov Vladimir I. Sobolev
author_facet	Aleksey N. Chernov Tatiana V. Astrakova Konstantin Yu. Koltunov Vladimir I. Sobolev
author_sort	Aleksey N. Chernov
title	Ethanol Dehydrogenation to Acetaldehyde over Co@N-Doped Carbon
title_short	Ethanol Dehydrogenation to Acetaldehyde over Co@N-Doped Carbon
title_full	Ethanol Dehydrogenation to Acetaldehyde over Co@N-Doped Carbon
title_fullStr	Ethanol Dehydrogenation to Acetaldehyde over Co@N-Doped Carbon
title_full_unstemmed	Ethanol Dehydrogenation to Acetaldehyde over Co@N-Doped Carbon
title_sort	ethanol dehydrogenation to acetaldehyde over co@n-doped carbon
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/4ef159c413094a2088e642ee5b22c730
work_keys_str_mv	AT alekseynchernov ethanoldehydrogenationtoacetaldehydeovercondopedcarbon AT tatianavastrakova ethanoldehydrogenationtoacetaldehydeovercondopedcarbon AT konstantinyukoltunov ethanoldehydrogenationtoacetaldehydeovercondopedcarbon AT vladimirisobolev ethanoldehydrogenationtoacetaldehydeovercondopedcarbon
_version_	1718412711322189824

Ethanol Dehydrogenation to Acetaldehyde over Co@N-Doped Carbon

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