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Fourier Transform Infrared Quantification of Sugars in Pretreated Biomass Liquors

  • Melvin P. Tucker
  • Ragheed K. Mitri
  • Fannie P. Eddy
  • Q. A. Nguyen
  • Lynn M. Gedvilas
  • John D. Webb
Chapter
Part of the Applied Biochemistry and Biotechnology book series (ABAB)

Abstract

The process of converting renewable lignocellulosic biomass to ethanol requires a number of steps, and pretreatment is one of the most important. Pretreatment usually involves a hydrolysis of the easily hydrolyzed hemicellulosic component of biomass using some form of thermal/chemical/mechanical action that results in a product that can be further hydrolyzed by cellulase enzymes (the cellulosic portion). The sugars produced can then be fermented to ethanol by fermentative microorganisms. If the pretreatment step is not severe enough, the resultant residue is not as easily hydrolyzed by the cellulase enzyme. More severe pretreatment conditions result in the production of degradation products that are toxic to the fermentative microorganism. In this article, we report the quantitative analysis of glucose, mannose, xylose, and acetic acid using Fourier transform infrared (FTIR) spectroscopy on liquors from dilute-acid-pretreated softwood and hardwood slurries. Comparison of FTIR and high-performance liquid chromatography quantitative analyses of these liquors are reported. Recent developments in infrared probe technology has enabled the rapid quantification of these sugars by FTIR spectroscopy in the batch reactor during optimization of the pretreatment conditions, or interfaced to the computer controlling a continuous reactor for on-line monitoring and control.

Index Entries

Fourier transform infrared biomass hardwood softwood pretreatment acid hydrolysis 

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Copyright information

© Springer Science+Business Media New York 2000

Authors and Affiliations

  • Melvin P. Tucker
    • 1
  • Ragheed K. Mitri
    • 2
  • Fannie P. Eddy
    • 1
  • Q. A. Nguyen
    • 1
  • Lynn M. Gedvilas
    • 1
  • John D. Webb
    • 1
  1. 1.National Renewable Energy LaboratoryBiotechnology Center for Fuels and ChemicalsGoldenUSA
  2. 2.Department of ChemistryUniversity of DenverDenverUSA

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