Abstract

Yellow poplar wood sawdust consists of 41% cellulose and 19% hemicellulose. The goal of pressure cooking this material in water is to hydrate the more chemically resistive regions of cellulose in order to enhance enzymatic conversion to glucose. Pretreatment can generate organic acids through acid-catalyzed degradation of monosaccharides formed because of acids released from the biomass material or the inherent acidity of the water at temperatures above 160°C The resulting acids will further promote the acid-catalyzed degradation of monomers that cause both a reduction in the yield and the formation of fermentation inhibitors such as hydroxymethyl furfural and furfural. A continuous pH-monitoring system was developed to help characterize the trends in pH during pretreatment and to assist in the development of a base (2.0 M KOH) addition profile to help keep the pH within a specified range in order to reduce any catalytic degradation and the formation of any monosac-charide degradation products during pretreatment. The results of this work are discussed.

Keywords

CelluloseSawdustChemistryHemicelluloseFurfuralMonosaccharideXyloseDegradation (telecommunications)Pulp and paper industryBiomass (ecology)XylanCatalysisBiorefineryFermentationOrganic chemistryRaw materialAgronomy

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Publication Info

Year
1998
Type
book-chapter
Pages
99-111
Citations
88
Access
Closed

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Cite This

Joseph Weil, Mark Brewer, Richard Hendrickson et al. (1998). Continuous pH Monitoring During Pretreatment of Yellow Poplar Wood Sawdust by Pressure Cooking in Water. Humana Press eBooks , 99-111. https://doi.org/10.1007/978-1-4612-1814-2_10

Identifiers

DOI
10.1007/978-1-4612-1814-2_10
PMID
41356117
PMCID
PMC12675849

Data Quality

Data completeness: 77%