Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 184, Issue -, Pages 153-162Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2015.11.005
Keywords
Catalytic hydroconversion; Liquefaction of lignin; Lignin residue; Lignin oil; Bi-dimensional gas chromatography
Funding
- IFP Energies nouvelles
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The hydroconversion of a wheat straw soda lignin was studied in a batch reactor, in tetralin solvent, with a NiMoS/Al2O3 catalyst under H-2 pressure at 350 degrees C. Gaseous, solid and liquid products were separated, quantified and detailed analyses were performed in order to describe and to understand the various reactions occurring versus residence time. In those operating conditions, the weakest beta-O-4 and alpha-O-4 ether linkages of the lignin were first cleaved. The lignin was thus progressively converted into smaller hydrogenated and deoxygenated fragments called lignin residues which were extensively characterized by GPC and NMR. In the liquid phase, smaller monomers and dimers were identified by GC x GC/MS and quantified by GC x GC/FID. The evolution of these molecules was investigated as a function of residence time in order to investigate the catalytic transformation scheme of lignin. (C) 2015 Elsevier B.V. All rights reserved.
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