Applied Biochemistry and Biotechnology

, Volume 98, Issue 1, pp 109–121

Comparison of aspen wood hydrolysates produced by pretreatment with liquid hot water and carbonic acid


DOI: 10.1385/ABAB:98-100:1-9:109

Cite this article as:
McWilliams, R.C. & van Walsum, G.P. Appl Biochem Biotechnol (2002) 98: 109. doi:10.1385/ABAB:98-100:1-9:109


Hydrolysates produced by the pretreatment of aspen wood with liquid hot water were compared with hydrolysates produced using carbonic acid pretreatment. Pretreatment temperatures tested ranged from 180° to 220°C; reaction times were varied between 2.5 and 30.5 min. Under most conditions tested, it was found that the presence of carbonic acid had no discernible effect on the amount of xylose released or concentration of furan compounds, as indicated by ultraviolet-visual absorbance between 270 and 280 nm. Thus, there appears to be little difference in the severity of the pretreatment conditions with or without the presence of carbonic acid. The presence of carbonic acid did, however, result in a hydrolysate with a higher final pH. It is hypothesized that the presence of the carbonic acid during the reaction may have the effect of reducing the accumulation of organic acids in the hydrolysate.

Index Entries

Carbonic acidpretreatmentliquid hot water pretreatmentautohydrolysisaspen woodpH

Copyright information

© Humana Press Inc. 2002

Authors and Affiliations

  1. 1.Department of Environmental Studies and Glasscock Research CenterBaylor UniversityWaco