Abstract: 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.

Cite: Chernov A.N. , Astrakova T.V. , Koltunov K.Y. , Sobolev V.I.
Ethanol Dehydrogenation to Acetaldehyde over Co@N-Doped Carbon
Catalysts. 2021. V.11. N11. 1411 :1-14. DOI: 10.3390/catal11111411 WOS Scopus РИНЦ AN OpenAlex

Dates:

Submitted:	Oct 29, 2021
Accepted:	Nov 19, 2021
Published print:	Nov 21, 2021
Published online:	Nov 21, 2021

Identifiers:

Web of science:	WOS:000725226700001
Scopus:	2-s2.0-85119333002
Elibrary:	47527735
Chemical Abstracts:	2021:2643244
OpenAlex:	W3215397982

Citing:

DB	Citing
Scopus	5
Web of science	5
Elibrary	2
OpenAlex	5

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