These authors contributed equally to this work.
Catalytic Lignin Valorization Process for the Production of Aromatic Chemicals and Hydrogen
Article first published online: 27 JUN 2012
Copyright © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Volume 5, Issue 8, pages 1602–1609, August 2012
How to Cite
Zakzeski, J., Jongerius, A. L., Bruijnincx, P. C. A. and Weckhuysen, B. M. (2012), Catalytic Lignin Valorization Process for the Production of Aromatic Chemicals and Hydrogen. ChemSusChem, 5: 1602–1609. doi: 10.1002/cssc.201100699
- Issue published online: 7 AUG 2012
- Article first published online: 27 JUN 2012
- Manuscript Revised: 13 FEB 2012
- Manuscript Received: 6 NOV 2011
- National Science Foundation. Grant Number: 0856754
- Netherlands Ministry of Economic Affairs
- Netherlands Ministry of Education, Culture and Science
- liquid phase reforming;
With dwindling reserves of fossil feedstock as a resource for chemicals production, the fraction of chemicals and energy supplied by alternative, renewable resources, such as lignin, can be expected to increase in the foreseeable future. Here, we demonstrate a catalytic process to valorize lignin (exemplified with kraft, organosolv, and sugarcane bagasse lignin) using a mixture of cheap, bio-renewable ethanol and water as solvent. Ethanol/water mixtures readily solubilize lignin under moderate temperatures and pressures with little residual solids. The molecular weight of the dissolved lignins was shown to be reduced by gel permeation chromatography and quantitative HSQC NMR methods. The use of liquid-phase reforming of the solubilized lignin over a Pt/Al2O3 catalyst at 498 K and 58 bar is introduced to yield up to 17 % combined yield of monomeric aromatic oxygenates such as guaiacol and substituted guaiacols generating hydrogen as a useful by-product. Reduction of the lignin dissolved in ethanol/water using a supported transition metal catalyst at 473 K and 30 bar hydrogen yields up to 6 % of cyclic hydrocarbons and aromatics.