Wood Liquefaction: Role of Solvent

M. Castellvi Barnes, Jan Oltvoort, Sascha R.A. Kersten, Jean Paul Lange*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

11 Citations (Scopus)

Abstract

The liquefaction of lignocellulose is strongly affected by the choice of the liquefaction solvent. This effect was studied by processing pinewood at 310°C in various organic solvents, including some refinery streams. The impact on yields of char, biocrude, and gas was determined. The resulting biocrude was analyzed with GPC and GC-MS, the solid residue with FTIR and HR-SEM, and the gas with GC. The solvents appeared to influence the liquefaction through interaction with early carbohydrate degradation products rather than interaction with the final biocrude. Indeed, biocrude is soluble in all solvents, and char is not formed by degradation of biocrude but rather by degradation of early carbohydrate intermediates. Effective solvents show a good affinity with the biomass, e.g., as expressed by Hildebrand values of 25-40 MPa1/2 or small Hansen distances (Ra) to cellulose and lignin. Protic solvents further slowed the liquefaction reaction. (Figure Presented).

Original languageEnglish
Pages (from-to)635-644
Number of pages10
JournalIndustrial and engineering chemistry research
Volume56
Issue number3
DOIs
Publication statusPublished - 25 Jan 2017

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