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Supercritical carbon dioxide pretreatment of corn stover and switchgrass for lignocellulosic ethanol production
- Source :
-
Bioresource Technology . Jul2011, Vol. 102 Issue 13, p6995-7000. 6p. - Publication Year :
- 2011
-
Abstract
- Abstract: Supercritical CO2 (SC-CO2), a green solvent suitable for a mobile lignocellulosic biomass processor, was used to pretreat corn stover and switchgrass at various temperatures and pressures. The CO2 pressure was released as quickly as possible by opening a quick release valve during the pretreatment. The biomass was hydrolyzed after pretreatment using cellulase combined with β-glucosidase. The hydrolysate was analyzed for the amount of glucose released. Glucose yields from corn stover samples pretreated with SC-CO2 were higher than the untreated sample’s 12% glucose yield (12g/100g dry biomass) and the highest glucose yield of 30% was achieved with SC-CO2 pretreatment at 3500psi and 150°C for 60min. The pretreatment method showed very limited improvement (14% vs. 12%) in glucose yield for switchgrass. X-ray diffraction results indicated no change in crystallinity of the SC-CO2 treated corn stover when compared to the untreated, while SEM images showed an increase in surface area. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 09608524
- Volume :
- 102
- Issue :
- 13
- Database :
- Academic Search Index
- Journal :
- Bioresource Technology
- Publication Type :
- Academic Journal
- Accession number :
- 60922504
- Full Text :
- https://doi.org/10.1016/j.biortech.2011.04.052