Hybrid process for the conversion of lignocellulosic materials

Journal Article · Tue Apr 01 00:00:00 EST 1997 · Applied Biochemistry and Biotechnology

OSTI ID:588706

Lee, K C.P.; Bulls, M; Holmes, J; Barrier, J W ^[1]

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1. Tennessee Valley Authority, Muscle Shoals, AL (United States)

Because of the recalcitrant nature of lignocellulosic materials, it is important to pretreat the biomass in order to obtain a suitable material for the bioconversion. In this study, two different types of pretreatments were performed. The first experiment used a 2-gal Parr reactor operated at 140, 150, 160, and 170{degrees}C with sulfuric acid concentrations varying from 0.5 to 2%. A second pretreatment was performed with a two-stage low-temperature process. The first-stage pretreatment was performed at 100 or 120{degrees}C with sulfuric acid concentrations of 0.5, 2, and 5% followed by a second-stage pretreatment at 120{degrees}C with 2% acid concentration. The best residues for enzymatic hydrolysis and simultaneous saccharification and fermentations (SSF) came from the higher temperature pretreatment with the Parr reactor. However, a large portion of the xylose fraction was degraded to furfural and glucose was degraded to HMF. On the contrary, the two-stage low temperature pretreatment resulted in a very low percentage of xylose degradation, and no glucose degradation. The residues from this two-stage pretreatment performed satisfactorily toward the production of ethanol by SSFs. This study discusses the results obtained from these experiments. 14 refs., 15 figs., 6 tabs.

• OSTI ID: 588706
• Journal Information: Applied Biochemistry and Biotechnology, Vol. 66, Issue 1; Other Information: PBD: Apr 1997
• Country of Publication: United States
• Language: English

Related Subjects

09 BIOMASS FUELS
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
55 BIOLOGY AND MEDICINE
BASIC STUDIES
BIOCONVERSION
BIOMASS
ENZYMATIC HYDROLYSIS
ETHANOL
FURFURAL
GLUCOSE
PARR REACTOR
PRODUCTION
SACCHARIFICATION
SULFURIC ACID
XYLOSE
CELLULOSE
FERMENTATION
DECOMPOSITION
BIODEGRADATION
SACCHAROMYCES CEREVISIAE
COST
RENEWABLE ENERGY SOURCES
NATIONAL RENEWABLE ENERGY LABORATORY