Song, Y;
Mobley, JK;
Motagamwala, AH;
Isaacs, M;
Dumesic, JA;
Ralph, J;
Lee, AF;
... Crocker, M; + view all
(2018)
Gold-catalyzed conversion of lignin to low molecular weight aromatics.
Chemical Science
, 9
(42)
pp. 8127-8133.
10.1039/c8sc03208d.
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Abstract
A heterogeneous catalyst system, employing Au nanoparticles (NPs) and Li-Al (1:2) layered double hydroxide (LDH) as support, showed excellent activity in aerobic oxidation of the benzylic alcohol group in β-O-4 linked lignin model dimers to the corresponding carbonyl products using molecular oxygen under atmospheric pressure. The synergistic effect between Au NPs and the basic Li-Al LDH support induces further reaction of the oxidized model compounds, facilitating facile cleavage of the β-O-4 linkage. Extension to oxidation of γ-valerolactone (GVL) extracted lignin and kraft lignin using Au/Li-Al LDH under similar conditions produced a range of aromatic monomers in high yield. Hydrolysis of the Au/Li-Al LDH oxidized lignin was found to increase the degree of lignin depolymerization, with monomer yields reaching 40% for GVL extracted lignin. Based on these results, the Au/Li-Al LDH + O2 catalyst system shows potential to be an environmentally friendly means of depolymerizing lignin to low molecular weight aromatics under mild conditions.
| Type: | Article |
|---|---|
| Title: | Gold-catalyzed conversion of lignin to low molecular weight aromatics |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1039/c8sc03208d |
| Publisher version: | https://doi.org/10.1039/c8sc03208d |
| Language: | English |
| Additional information: | This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10062555 |
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