The role of solvent in aqueous-organic solvent delignification of southern yellow pine. Doctoral thesis

Technical Report · Wed Jul 01 04:00:00 EDT 1981

OSTI ID:5485717

Hansen, S M

The effects of solvents are studied in batch organic solvent delignification of Southern Yellow Pine. Organic solvent delignification is discussed and related literature is surveyed. Wood chips pulverized into meal were heated with solvents in a mechanical agitator. Predictive equations are derived from experimental data for yellow pine in new solvent systems. The effects of solvents on the swelling of wood are investigated, and the discovery of a relationship between volumetric swelling and bulk delignification is reported. A rate equation is developed to determine the percentage of lignin remaining at various times during the delignification process. Integration of this equation yields the same two-step curve which was observed in the delignification experiments. It was concluded that the mathematical models presented can predict first-step delignification results within 5 percent of experimental values and second-step delignification results within 12 percent of experimental values. For any solvent or wood type, the only parameters needed to describe bulk delignification results are the wood swelling parameters.

• Research Organization: Alabama Univ., University (USA). Bureau of Engineering Research
• OSTI ID: 5485717
• Report Number(s): PB-82-103516
• Country of Publication: United States
• Language: English

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BIOMASS
CARBOHYDRATES
CONIFERS
DELIGNIFICATION
ENERGY SOURCES
EXTRACTION
FUELS
LIGNIN
MATHEMATICAL MODELS
ORGANIC COMPOUNDS
ORGANIC SOLVENTS
PINES
PLANTS
POLYSACCHARIDES
RENEWABLE ENERGY SOURCES
SACCHARIDES
SEPARATION PROCESSES
SOLUBILITY
SOLVENT EXTRACTION
SOLVENTS
SWELLING
TREES
WOOD