Predicting solvent effects in organosolv treatment of Southern yellow pine

Journal Article · Thu Jan 01 04:00:00 EST 1981 · Biosources Dig.; (United States)

OSTI ID:7011045

Hansen, S M; April, G C

The bulk delignification of Southern Yellow Pine using various organic solvent systems has been found to occur in two distinct phases which can be described by first order kinetics. These results are consistent with the findings in the literature. In determining the effect of temperature on the apparent rate constants in several solvent systems (aqueous solutions of ethanol, n-butanol, phenol and butyl cellosolve), the delignification data were analyzed using transition state theory. This analysis showed that an isokinetic relationship exists for both the residual pulp and lignin in the delignification reactions. The existence of an isokinetic relationship is strong evidence that changing the solvent system does not change the mechanisms involved in the removal of total wood or lignin. The isokinetic temperature for the residual pulp remaining in Southern Yellow Pine delignification was found to be 597.3 plus or minus 30.4 degrees K. For the residual the isokinetic temperature was found to be 545.6 plus or minus 25.6 degrees K. Using the isokinetic relationship obtained from the set of baseline data, and a single experimentally determined rate constant from a new solvent system (THFA/water), the apparent rate constants at other temperatures in the range of interest were predicted within one percent of the experimentally determined values.

• Research Organization: Dept of Chemical and Metallurgical Engineering, Univ of Alabama, Alabama 35486
• OSTI ID: 7011045
• Journal Information: Biosources Dig.; (United States), Journal Name: Biosources Dig.; (United States) Vol. 3:1; ISSN BIDID
• Country of Publication: United States
• Language: English

Related Subjects

09 BIOMASS FUELS
140504* -- Solar Energy Conversion-- Biomass Production & Conversion-- (-1989)
CONIFERS
DELIGNIFICATION
KINETICS
ORGANIC SOLVENTS
PINES
PLANTS
SOLVENTS
TEMPERATURE DEPENDENCE
TREES
WOOD