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Hydrogenolysis of lignin-derived aryl ethers to monomers over a MOF-derived Ni/N-C catalyst

Abstract

A highly efficient Ni/N-C catalyst was synthesized by a facile pyrolysis of Ni-containing metal-organic framework (Ni-MOF), and its catalytic hydrogenolysis performance towards C-O bonds in lignin was evaluated using diphenyl ether (DPE) as a model compound in detail. Scanning electron microscope (SEM) and transmission electron microscope (TEM) analyses show that the flowerlike nanosheets of Ni-MOF shrink forming a loose and ordered spherical structure during pyrolysis. Under the optimal conditions, DPE was completely converted and the selectivity of monomers (benzene, cyclohexanol and cyclohexane) reached to 99.1%. During the catalytic hydrogenolysis conversion (CHC) of DPE, the direct cleavage of Caromatic-O bond affording benzene and phenol is the major reaction pathway, and low H2 pressure is crucial to increase monomers selectivity. Furthermore, the Ni/N-C-450 shows high hydrogenolysis activity to other lignin-derived aryl ethers, such as benzyl phenyl ether, dibenzyl ether, dinaphthalene ether, benzyl 2-naphthyl ether and 3-methoxyphenol.

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Supplementary files

Article information


Submitted
29 Jan 2020
Accepted
22 Mar 2020
First published
23 Mar 2020

React. Chem. Eng., 2020, Accepted Manuscript
Article type
Paper

Hydrogenolysis of lignin-derived aryl ethers to monomers over a MOF-derived Ni/N-C catalyst

X. Si, Y. Zhao, Q. Song, J. Cao, R. Wang and X. Wei, React. Chem. Eng., 2020, Accepted Manuscript , DOI: 10.1039/D0RE00040J

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