Journal
APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
Volume 155, Issue 1-3, Pages 418-428Publisher
HUMANA PRESS INC
DOI: 10.1007/s12010-008-8490-y
Keywords
Pretreatment; Dilute acid; Batch reactors; Particle size; Corn stover; Xylose and severity
Funding
- US Department of Energy's Office of Energy Efficiency and Renewable Energy, Office of the Biomass Program
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Pretreatment experiments were carried out to demonstrate high xylose yields at high solids loadings in two different batch pretreatment reactors under process-relevant conditions. Corn stover was pretreated with dilute sulfuric acid using a 4-l Steam Digester and a 4-l stirred ZipperClave(R) reactor. Solids were loaded at 45% dry matter (wt/wt) after sulfuric acid catalyst impregnation using nominal particle sizes of either 6 or 18 mm. Pretreatment was carried out at temperatures between 180 and 200 degrees C at residence times of either 90 or 105 s. Results demonstrate an ability to achieve high xylose yields (>80%) over a range of pretreatment conditions, with performance showing little dependence on particle size or pretreatment reactor type. The high xylose yields are attributed to effective catalyst impregnation and rapid rates of heat transfer during pretreatment.
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