Effect of pelleting on the recalcitrance and bioconversion of dilute-acid pretreated corn stover
Conference
·
OSTI ID:1070140
Background: Knowledge regarding the performance of densified biomass in biochemical processes is limited. The effects of densification on biochemical conversion are explored here. Methods: Pelleted corn stover samples were generated from bales that were milled to 6.35 mm. Low-solids acid pretreatment and simultaneous saccharification and fermentation were performed to evaluate pretreatment efficacy and ethanol yields achieved for pelleted and ground stover (6.35 mm and 2 mm) samples. Both pelleted and 6.35-mm ground stover were evaluated using a ZipperClave® reactor under high-solids, process-relevant conditions for multiple pretreatment severities (Ro), followed by enzymatic hydrolysis of the washed, pretreated solids. Results: Monomeric xylose yields were significantly higher for pellets (approximately 60%) than for ground formats (approximately 38%). Pellets achieved approximately 84% of theoretical ethanol yield (TEY); ground stover formats had similar profiles, reaching approximately 68% TEY. Pelleting corn stover was not detrimental to pretreatment efficacy for both low- and high-solids conditions, and even enhanced ethanol yields.
- Research Organization:
- Idaho National Laboratory (INL)
- Sponsoring Organization:
- DOE - EE
- DOE Contract Number:
- AC07-05ID14517;
- OSTI ID:
- 1070140
- Report Number(s):
- INL/CON-12-26673
- Conference Information:
- EES&T Seminar Series,IRC 120,07/20/2012,07/20/2012
- Country of Publication:
- United States
- Language:
- English
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