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26 - Biofuels from cellulosic biomass via aqueous processing

from Part 3 - Renewable energy sources

Published online by Cambridge University Press:  05 June 2012

By
Jian Shi ,
Qing Qing ,
Taiying Zhang ,
Charles E. Wyman  and
Todd A. Lloyd
Edited by
David S. Ginley  and
David Cahen
Jian Shi
Affiliation:
Center for Environmental Research and Technology, University of California, Riverside, CA, USA
Qing Qing
Affiliation:
Center for Environmental Research and Technology, University of California, Riverside, CA, USA Department of Chemical and Environmental Engineering, University of California, Riverside, CA, USA
Taiying Zhang
Affiliation:
Center for Environmental Research and Technology, University of California, Riverside, CA, USA
Charles E. Wyman
Affiliation:
Center for Environmental Research and Technology, University of California, Riverside, CA, USA Department of Chemical and Environmental Engineering, University of California, Riverside, CA, USA
Todd A. Lloyd
Affiliation:
Mascoma Corporation, Lebanon, NH, USA
David S. Ginley
Affiliation:
National Renewable Energy Laboratory, Colorado
David Cahen
Affiliation:
Weizmann Institute of Science, Israel
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Summary

Focus

Thermochemical aqueous processing of cellulosic biomass requires depolymerization of long chains of carbohydrate molecules into fragments that can be metabolized by micro-organisms or catalytically converted to fuels and chemicals. This chapter focuses on such processes for carbohydrate depolymerization and their integration with subsequent product-formation steps in an effort to produce ethanol and other biofuels.

Synopsis

Cellulosic biofuels, which once were widely used but whose usage dropped sharply upon the introduction of refined petroleum products to the energy supply, can be a cost-effective fuel with applications in vital areas. Current strategies focus on maximizing the efficiency of conversion of cellulosic biomass waste into energy-rich products, especially liquid fuels, such as alcohols and other hydrocarbons. Recent research on the chemical and biological pretreatment of cellulosic feedstock materials shows promise for surpassing thermal processes in catalyzing the breakdown of cellulose and lignin, which is a crucial first step in the production of useful fuels. Chemical pretreatments include autohydrolysis, application of low and high pH (i.e., acids and bases), exposure to ammonia, and treatment with organic solvents and ionic liquids. Each of these methods is effective at breaking cellulose down so that it can be more easily digested enzymatically. These techniques generally offer good yields from a variety of feedstocks and therefore should be broadly applicable. In particular, it is expected that feedstocks will include waste materials such as food-crop residues (e.g., corn stover and sugarcane bagasse) and dedicated energy crops (e.g., switchgrass) that can be grown on otherwise agriculturally poor land. This aspect is particularly important in terms of minimizing the societal and environmental impacts of biofuels technology. For example, use of such feedstocks is intended to eliminate competition with food crops for arable land, which could lead to sharp increases in food prices. It should also help minimize the issue of indirect land-use change (see Chapter 2) that could actually result in increased CO2 emissions.

Type
Chapter
Information
Fundamentals of Materials for Energy and Environmental Sustainability , pp. 336 - 348
Publisher: Cambridge University Press
Print publication year: 2011

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References

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  • Biofuels from cellulosic biomass via aqueous processing
    • By Jian Shi, Center for Environmental Research and Technology, University of California, Riverside, CA, USA, Qing Qing, Center for Environmental Research and Technology, University of California, Riverside, CA, USA Department of Chemical and Environmental Engineering, University of California, Riverside, CA, USA, Taiying Zhang, Center for Environmental Research and Technology, University of California, Riverside, CA, USA, Charles E. Wyman, Center for Environmental Research and Technology, University of California, Riverside, CA, USA Department of Chemical and Environmental Engineering, University of California, Riverside, CA, USA, Todd A. Lloyd, Mascoma Corporation, Lebanon, NH, USA
  • Edited by David S. Ginley, National Renewable Energy Laboratory, Colorado, David Cahen, Weizmann Institute of Science, Israel
  • Book: Fundamentals of Materials for Energy and Environmental Sustainability
  • Online publication: 05 June 2012
  • Chapter DOI: https://doi.org/10.1017/CBO9780511718786.030
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  • Biofuels from cellulosic biomass via aqueous processing
    • By Jian Shi, Center for Environmental Research and Technology, University of California, Riverside, CA, USA, Qing Qing, Center for Environmental Research and Technology, University of California, Riverside, CA, USA Department of Chemical and Environmental Engineering, University of California, Riverside, CA, USA, Taiying Zhang, Center for Environmental Research and Technology, University of California, Riverside, CA, USA, Charles E. Wyman, Center for Environmental Research and Technology, University of California, Riverside, CA, USA Department of Chemical and Environmental Engineering, University of California, Riverside, CA, USA, Todd A. Lloyd, Mascoma Corporation, Lebanon, NH, USA
  • Edited by David S. Ginley, National Renewable Energy Laboratory, Colorado, David Cahen, Weizmann Institute of Science, Israel
  • Book: Fundamentals of Materials for Energy and Environmental Sustainability
  • Online publication: 05 June 2012
  • Chapter DOI: https://doi.org/10.1017/CBO9780511718786.030
Available formats
×

Save book to Google Drive

To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Google Drive.

  • Biofuels from cellulosic biomass via aqueous processing
    • By Jian Shi, Center for Environmental Research and Technology, University of California, Riverside, CA, USA, Qing Qing, Center for Environmental Research and Technology, University of California, Riverside, CA, USA Department of Chemical and Environmental Engineering, University of California, Riverside, CA, USA, Taiying Zhang, Center for Environmental Research and Technology, University of California, Riverside, CA, USA, Charles E. Wyman, Center for Environmental Research and Technology, University of California, Riverside, CA, USA Department of Chemical and Environmental Engineering, University of California, Riverside, CA, USA, Todd A. Lloyd, Mascoma Corporation, Lebanon, NH, USA
  • Edited by David S. Ginley, National Renewable Energy Laboratory, Colorado, David Cahen, Weizmann Institute of Science, Israel
  • Book: Fundamentals of Materials for Energy and Environmental Sustainability
  • Online publication: 05 June 2012
  • Chapter DOI: https://doi.org/10.1017/CBO9780511718786.030
Available formats
×