Accounting for all sugars produced during integrated production of ethanol from lignocellulosic biomass
- National Renewable Energy Lab. (NREL), Golden, CO (United States). National Bioenergy Center
- P2 Science, Woodbridge, CT (United States)
This study explored integrated conversion of corn stover to ethanol and highlights techniques for accurate yield calculations. Acid pretreated corn stover (PCS) produced in a pilot-scale reactor was enzymatically hydrolyzed and the resulting sugars were fermented to ethanol by the glucose–xylose fermenting bacteria, Zymomonas mobilis 8b. The calculations account for high solids operation and oligomeric sugars produced during pretreatment, enzymatic hydrolysis, and fermentation, which, if not accounted for, leads to overestimating ethanol yields. The calculations are illustrated for enzymatic hydrolysis and fermentation of PCS at 17.5% and 20.0% total solids achieving 80.1% and 77.9% conversion of cellulose and xylan to ethanol and ethanol titers of 63 g/L and 69 g/L, respectively. In the future, these techniques, including the TEA results, will be applied to fully integrated pilot-scale runs.
- Research Organization:
- National Renewable Energy Laboratory (NREL), Golden, CO (United States)
- Sponsoring Organization:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Sustainable Transportation Office. Bioenergy Technologies Office (BETO)
- Grant/Contract Number:
- AC36-08GO28308
- OSTI ID:
- 1237439
- Alternate ID(s):
- OSTI ID: 1358840
- Report Number(s):
- NREL/JA-5100-65494
- Journal Information:
- Bioresource Technology, Vol. 205, Issue C; ISSN 0960-8524
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
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