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Simultaneous Liquefaction and Hydrodeoxygenation of Lignocellulosic Biomass over NiMo/Al 2 O 3 , Pd/Al 2 O 3 , and Zeolite Y Catalysts in Hydrogen Donor Solvents
Author(s) -
Grilc Miha,
Likozar Blaž,
Levec Janez
Publication year - 2016
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201500840
Subject(s) - hydrodeoxygenation , hydrothermal liquefaction , hydrogenolysis , chemistry , catalysis , lignocellulosic biomass , organic chemistry , cellulose , selectivity
The one‐step solvolysis and hydro‐treatment of oak, fir and beech sawdust was studied in a slurry reactor using tetralin, phenol and glycerol as solvents and representative heterogeneous catalysts used in the petrochemical industry for hydrogenolysis (the sulfide form of NiMo/Al 2 O 3 ), hydrogenation (Pd/Al 2 O 3 ) or fluid catalytic cracking (zeolite Y). Deoxyliquefaction products of cellulose, hemicellulose and lignin were characterised in terms of solvent fractionation, FTIR and diffuse reflectance infrared Fourier transform spectroscopy, elemental analysis and an innovative method for particle size distribution and mean grain size determination by SEM image processing. A new lumped kinetic model was developed according to the reaction mechanisms, which contain wood de‐polymerisation, decarbonylation, decarboxylation and demethanation, tar phase hydrodeoxygenation by molecular and in situ generated hydrogen, as well as charring inhibition by free‐radical stabilisation hydrogen transfer.