Processing and economic impacts of biomass delignification for ethanol production View Full Text


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Article Info

DATE

1995-09

AUTHORS

R. T. Elander, T. Hsu

ABSTRACT

The need for chemical pretreatment of biomass for the enzyme-catalyzed production of ethanol from lignocellulosic feedstocks has been established. Past research in the Alternative Fuels Division of the National Renewable Energy Laboratory has focused on dilute-acid prehydrolysis processes as a means of hydrolyzing the hemicellulose component of biomass. Such processes provide a solid residue that is more easily hydrolyzable by cellulase enzymes, as well as a hemicellulose-sugar component that can be converted by pentose-fermenting microorganisms. This work investigates the technical and economic feasibility of including a separate biomass delignification/fractionation step, either in conjunction with dilute acid prehydrolysis or as an independent pretreatment process. These alternatives would not only solubilize the hemicellulose component of a biomass feedstock, but the lignin fraction as well. The resulting residual solids would be primarily composed of cellulose. The benefits found in converting such material to ethanol may include lower cellulase requirements, shorter bioconversion times, higher effective cellulose concentrations resulting in higher ethanol concentrations, smaller reactor volumes, and more efficient enzyme recycle options. A technoeconomic assessment indicates that improvements in these process parameters can lead to significant savings that can cover the costs of such process additions. More... »

PAGES

463

References to SciGraph publications

  • 1990-03. Dilute acid pretreatment of short rotation woody and herbaceous crops in APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
  • 1991-03. The ammonia freeze explosion (AFEX) process in APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
  • 1992-03. Preliminary estimate of the cost of ethanol production for ssf technology in APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
  • 1989-01. Assessment of pretreatment conditions to obtain fast complete hydrolysis on high substrate concentrations in APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
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    http://scigraph.springernature.com/pub.10.1007/bf02933448

    DOI

    http://dx.doi.org/10.1007/bf02933448

    DIMENSIONS

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