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Pseudo-Lignin Formation during Dilute acid Pretreatment for Cellulosic Ethanol

Author

Listed:
  • Xianzhi Meng
  • Arthur J. Ragauskas

    (Department of Chemical and Bimolecular Engineering, University of Tennessee -knoxville, USA)

  • Arthur J. Ragauskas

    (Biosciences Division, BioEnergy Science Center, Oak Ridge National Laboratory, USA)

  • Arthur J. Ragauskas

    (UT-ORNL Joint Institute for Biological Science, Oak Ridge National Laboratory, USA)

  • Arthur J. Ragauskas

    (Department of Forestry, Wildlife, and Fisheries, Center for Renewable Carbon, University of Tennessee Institute of Agriculture, USA)

Abstract

Dilute acid-based pretreatment represents one of the most important pretreatment technologies to reduce biomass recalcitrance and it has been successfully applied to a wide range of feedstocks. During this type of pretreatment, the relative lignin content usually increases partially due to the loss of carbohydrates. More importantly, it has been reported that the increase of lignin content after dilute acid pretreatment is mainly due to the formation of pseudo-lignin. The exact reaction mechanisms leading to the formation of pseudo-lignin is still under investigation. However, it has been proposed that rearrangement of hydroxymethylfurfural (HMF) or furfural can produce aromatic type of compounds which can further undergo polymerization reactions to from a lignin-like polyphenolic structures termed as pseudo-lignin. This mini-review mainly covers recent advances in understanding the fundamentals of pseudo-lignin formation during dilute acid pretreatment, the impact of its formation on enzymatic hydrolysis, and how to suppress its formation during dilute acid pretreatment.

Suggested Citation

  • Xianzhi Meng & Arthur J. Ragauskas & Arthur J. Ragauskas & Arthur J. Ragauskas & Arthur J. Ragauskas, 2017. "Pseudo-Lignin Formation during Dilute acid Pretreatment for Cellulosic Ethanol," Recent Advances in Petrochemical Science, Juniper Publishers Inc., vol. 1(1), pages 1-5, April.
    • Handle: RePEc:adp:rapsci:v:1:y:2017:i:1:p:1-5
    DOI: 10.19080/RAPSCI.2017.01.555551
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    Cited by:

    1. Hassan, Shady S. & Williams, Gwilym A. & Jaiswal, Amit K., 2019. "Moving towards the second generation of lignocellulosic biorefineries in the EU: Drivers, challenges, and opportunities," Renewable and Sustainable Energy Reviews, Elsevier, vol. 101(C), pages 590-599.

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