Severity function describing the hydrolysis of xylan using carbonic acid |
| |
Authors: | van Walsu G Peter |
| |
Institution: | (1) Department of Environmental Studies and Glasscock Energy Research Center, Baylor University, PO Box 97266, 76798-7266 Waco, TX |
| |
Abstract: | Beech wood derived xylan to hydrolyzed to predominantly xylose monomer units after exposure to hot, compressed liquid water
saturated with carbon dioxide. Similar treatment without CO2 saturation resulted in only minor hydrolysis and a smaller fraction of monomers among the hydrolysis products. Severity of
the hydrolysis reaction was correlated to reaction time, temperature, and carbon dioxide partial pressure and followed a function
similar to those used to characterize mineral acid systems. Results from parallel hydrolysis experiments with an aqueous system
and a very dilute sulfuric acid system allowed an approximation of the dissociation constant of carbonic acid in the temperature
range of 170–230°C. Results suggest that carbonic acid may be a viable reagent for promoting hydrolysis without mineral acids,
especially in the case of a bioprocessing plant that produces carbon dioxide. |
| |
Keywords: | Xylan carbonic acid severity hydrolysis biomass conversion pretreatment carbon dioxide |
本文献已被 SpringerLink 等数据库收录! |
|