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Pseudo reaction kinetics of organic degradation products in dilute‐acid‐catalyzed corn stover pretreatment hydrolysates
Author(s) -
Chen ShouFeng,
Mowery Richard A.,
Chambliss C. Kevin,
van Walsum G. Peter
Publication year - 2007
Publication title -
biotechnology and bioengineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.136
H-Index - 189
eISSN - 1097-0290
pISSN - 0006-3592
DOI - 10.1002/bit.21480
Subject(s) - corn stover , kinetics , chemistry , hydrolysate , degradation (telecommunications) , catalysis , organic chemistry , stover , chromatography , hydrolysis , agronomy , biology , telecommunications , physics , quantum mechanics , computer science , crop
A variety of degradation products are produced upon pretreatment of lignocellulosic biomass with dilute acid. To date, the complexity of these samples has significantly limited the scope of efforts to perform summative analyses of degradation products. Qualitative and quantitative interrogation of hydrolysates is also paramount to identifying potential correlations between pretreatment chemistry and microbial inhibition in downstream bioconversion processes. A recently developed reversed‐phase high performance liquid chromatography technique with UV detection has been applied to perform quantitative assessments of a variety of hydrolysate components as a function of pretreatment time and temperature. Correlations of product concentrations to the pretreatment severity function indicate differing responses of various compounds to the kinetic influences of temperature and reaction time. Of the compounds measured, four demonstrated initial accumulation rates were sufficiently linear over the time period tested to enable determination of activation energy E a . All four compounds appear to demonstrate higher E a than that assumed in the commonly applied severity function. Overall accumulation trends for most compounds indicated similar under‐estimation of apparent activation energy by the severity function. Biotechnol. Bioeng. 2007;98: 1135–1145. © 2007 Wiley Periodicals, Inc.