Journal
BIORESOURCE TECHNOLOGY
Volume 161, Issue -, Pages 78-83Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2014.02.092
Keywords
Lignin; Catalysis; Porous metal oxides; Bio-oil; Supercritical solvents
Funding
- USDA National Institute of Food and Agriculture, Critical Agricultural Materials program [2010-38202-21853]
- Danish National Advanced Technology Foundation
- Novozymes A/S
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An isolated, solvent-extracted lignin from candlenut (Aleurites moluccana) biomass was subjected to catalytic depolymerization in the presence of supercritical methanol, using a range of porous metal oxides derived from hydrotalcite-like precursors. The most effective catalysts in terms of lignin conversion to methanol-soluble products, without char formation, were based on copper in combination with other dopants based on relatively earth-abundant metals. Nearly complete conversion of lignin to bio-oil composed of monomers and low-mass oligomers with high aromatic content was obtained in 6 h at 310 degrees C using a catalyst based on a Cu- and La-doped hydrotalcite-like precursor. Product mixtures were characterized by NMR spectroscopy, gel permeation chromatography, and GC-MS. (C) 2014 Published by Elsevier Ltd.
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