Oxidative lime pretreatment of Dacotah switchgrass. Academic Article uri icon

abstract

  • Oxidative lime pretreatment increases the enzymatic digestibility of lignocellulosic biomass primarily by removing lignin. In this study, recommended pretreatment conditions (reaction temperature, oxygen pressure, lime loading, and time) were determined for Dacotah switchgrass. Glucan and xylan overall hydrolysis yields (72h, 15FPU/g raw glucan) were measured for 105 different reaction conditions involving three different reactor configurations (very short term, short term, and long term). The short-term reactor was the most productive. At the recommended pretreatment condition (120C, 6.89bar O(2), 240min), it achieved an overall glucan hydrolysis yield of 85.2g glucan hydrolyzed/100g raw glucan and an overall xylan yield of 50.1g xylan hydrolyzed/100g raw xylan. At this condition, glucan oligomers (1.80g glucan recovered/100g glucan in raw biomass) and xylan oligomers (25.20g xylan recovered/100g xylan in raw biomass) were recovered from the pretreatment liquor, which compensate for low pretreatment yields.

published proceedings

  • Appl Biochem Biotechnol

author list (cited authors)

  • Falls, M., Sierra-Ramirez, R., & Holtzapple, M. T.

citation count

  • 14

complete list of authors

  • Falls, Matthew||Sierra-Ramirez, Rocio||Holtzapple, Mark T

publication date

  • September 2011