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Highly Selective Hydrogenation of 5-Hydroxymethylfurfural to 2,5-Dimethylfuran at Low Temperature over a Co-N-C/NiAl-MMO catalyst

Abstract

A Currently there is tremendous interest in the discovery of catalysts which can selectively hydrogenate biomass-derived 5-hydroxymethylfurfural (HMF) to 2,5-dimethylfuran (DMF). Herein, a highly selective catalyst for this transformation was developed, by adsorption of a cobalt porphyrin (CoTAPP) on a nickel-aluminium layered double hydroxide (NiAl-LDH) support, followed by a pyrolysis step at 500 oC under a N2 atmosphere. The obtained catalyst (denoted here as Co-N-C/NiAl-MMO), comprising cobalt species (Co0 and CoOx) and N-doped carbon on a NiAl mixed metal oxide support, showed outstanding initial selectivity (99.9%) for the hydrogenation of HMF to DMF at 170 °C in tetrahydrofuran (THF). This is one of the highest selectivities reported to date for this reaction, with the reaction temperature being very mild. After 3 cycles of catalytic tests, with catalyst regeneration by heating at 300 oC in N2, the HMF conversion efficiency and DMF selectivity of Co-N-C/NiAl-MMO had both decreased by >70% compared to the initial values. This deactivation resulted from the loss of surface basic sites needed for H2 activation, as well as a change in the Co speciation on the catalyst surface (i.e. Co0 oxidation to CoOx). Results guide the development of improved catalysts for the selective conversion of HMF to DMF.

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Supplementary files

Article information


Submitted
24 Feb 2020
Accepted
06 May 2020
First published
23 May 2020

Catal. Sci. Technol., 2020, Accepted Manuscript
Article type
Paper

Highly Selective Hydrogenation of 5-Hydroxymethylfurfural to 2,5-Dimethylfuran at Low Temperature over a Co-N-C/NiAl-MMO catalyst

N. Ma, Y. Song, F. Han, G. Waterhouse, Y. Li and S. Ai, Catal. Sci. Technol., 2020, Accepted Manuscript , DOI: 10.1039/D0CY00363H

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