Comparison of yellow poplar pretreatment between NREL digester and Sunds hydrolyzer

Single-stage cocurrent dilute acid pretreatments were carried out on yellow poplar (Liriodendron tulipifera) sawdust using an as-installed and short residence time modified pilot-scale Sunds hydrolyzer and a 4-L bench-scale NREL digester (steam explosion reactor). Pretreatment conditions for the Sun...

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Bibliographic Details
Published in:Applied biochemistry and biotechnology 1998-03, Vol.70 (1), p.25-35
Main Authors: Tucker, M.P. (National Renewable Energy Laboratory, Golden, CO.), Farmer, J.D, Keller, F.A, Schell, D.J, Nguyen, Q.A
Format: Article
Language:English
Subjects:
Biofuel production
Biological and medical sciences
Biotechnology
Cellulose
Energy
Fundamental and applied biological sciences. Psychology
HEMICELLULOSE
HEMICELULOSA
Industrial applications and implications. Economical aspects
LIGNOCELLULOSE
LIGNOCELULOSA
LIRIODENDRON TULIPIFERA
Sawdust
Sulfuric acid
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Summary:Single-stage cocurrent dilute acid pretreatments were carried out on yellow poplar (Liriodendron tulipifera) sawdust using an as-installed and short residence time modified pilot-scale Sunds hydrolyzer and a 4-L bench-scale NREL digester (steam explosion reactor). Pretreatment conditions for the Sunds hydrolyzer, installed in the NREL process development unit (PDU), which operates at 1 t/d (bone-dry t) feed rate, spanned the temperature range of 160-210 degrees C, 0.1-1.0% (w/w) sulfuric acid, and 4-10-min residence times. The batch pretreatments of yellow poplar sawdust in the bench-scale digester were carried out at 210 and 230 degrees C, 0.26% (w/w) sulfuric acid, and 1-, 3-, and 4-min residence times. The dilute acid prehydrolysis solubilized more than 90% of the hemicellulose, and increased the enzymatic digestibility of the cellulose that remained in the solids. Compositional analysis of the pretreated solids and liquors and mass balance data show that the two pretreatment devices had similar pretreatment performance
ISSN:0273-2289
1559-0291
DOI:10.1007/BF02920121