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Issue 1, 2021
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Continuous hydrogenolysis of acetal-stabilized lignin in flow

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Abstract

Using acetal-stabilized lignin we performed a truly steady state continuous high-yielding lignin depolymerization (45% monophenolics using Ni/C), which offered a window into challenges and opportunities that will be faced when processing this feedstock. With an excess of catalyst present, we observed stable depolymerization yields for 125 h time on stream. However, using catalyst loadings that were just sufficient to achieve initial maximum hydrogenolysis monomer yields revealed rapid catalyst deactivation. High yields could be partially recovered with high temperature regeneration under a reducing environment. Characterization of spent catalysts revealed that sintering and carbonaceaous deposits rather than leaching were the main phenomena causing deactivation.

Graphical abstract: Continuous hydrogenolysis of acetal-stabilized lignin in flow

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Supplementary files

Article information


Submitted
27 Aug 2020
Accepted
24 Nov 2020
First published
08 Dec 2020

Green Chem., 2021,23, 320-327
Article type
Communication

Continuous hydrogenolysis of acetal-stabilized lignin in flow

W. Lan, Y. P. Du, S. Sun, J. Behaghel de Bueren, F. Héroguel and J. S. Luterbacher, Green Chem., 2021, 23, 320 DOI: 10.1039/D0GC02928A

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