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Title: Effects of one-step alkaline and two-step alkaline/dilute acid and alkaline/steam explosion pretreatments on the structure of isolated pine lignin

Abstract

Biological valorization of biomass most often depends on the efficient reduction of plant cell wall recalcitrance and conversion of lignin – the most recalcitrant constituent – to fuels, chemicals and/or value-added substances. Lignin conversion to fuels and value-added chemicals requires a sound understanding of the structure of lignin before and after different pretreatments. In the current work, an effort has been made to compare the structural differences in isolated pine lignin after one- (alkaline) and two-step (alkaline/dilute acid and alkaline/steam explosion) pretreatments. Our results indicate removal of the low molecular weight fraction of lignin after an initial alkaline pretreatment. A subsequent dilute acid pretreatment resulted in the loss of lignin inter-unit linkages such as β-O-4’ aryl ethers. Furthermore, with a steam explosion pretreatment, lignin exhibited a competing condensation process leading to increased condensed lignin structures.

Authors:
 [1]; ORCiD logo [2];  [3]; ORCiD logo [1]
  1. Univ. of Tennessee, Knoxville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. Univ. of Tennessee, Knoxville, TN (United States); Pulp and Paper Program- Institute of Materials of Misiones (National University of Misiones - National Council of Scientific and Technical Research), Misiones (Argentina)
  3. Pulp and Paper Program- Institute of Materials of Misiones (National University of Misiones - National Council of Scientific and Technical Research), Misiones (Argentina)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Biological and Environmental Research (BER) (SC-23)
OSTI Identifier:
1489098
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Biomass and Bioenergy
Additional Journal Information:
Journal Volume: 120; Journal Issue: C; Journal ID: ISSN 0961-9534
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
59 BASIC BIOLOGICAL SCIENCES; Pine; Cellulolytic enzyme lignin; Alkaline pretreatment; Dilute acid pretreatment; Steam explosion pretreatment

Citation Formats

Das, Parthapratim, Stoffel, Romina B., Area, Maria C., and Ragauskas, Arthur J. Effects of one-step alkaline and two-step alkaline/dilute acid and alkaline/steam explosion pretreatments on the structure of isolated pine lignin. United States: N. p., 2018. Web. doi:10.1016/j.biombioe.2018.11.029.
Das, Parthapratim, Stoffel, Romina B., Area, Maria C., & Ragauskas, Arthur J. Effects of one-step alkaline and two-step alkaline/dilute acid and alkaline/steam explosion pretreatments on the structure of isolated pine lignin. United States. doi:10.1016/j.biombioe.2018.11.029.
Das, Parthapratim, Stoffel, Romina B., Area, Maria C., and Ragauskas, Arthur J. Thu . "Effects of one-step alkaline and two-step alkaline/dilute acid and alkaline/steam explosion pretreatments on the structure of isolated pine lignin". United States. doi:10.1016/j.biombioe.2018.11.029. https://www.osti.gov/servlets/purl/1489098.
@article{osti_1489098,
title = {Effects of one-step alkaline and two-step alkaline/dilute acid and alkaline/steam explosion pretreatments on the structure of isolated pine lignin},
author = {Das, Parthapratim and Stoffel, Romina B. and Area, Maria C. and Ragauskas, Arthur J.},
abstractNote = {Biological valorization of biomass most often depends on the efficient reduction of plant cell wall recalcitrance and conversion of lignin – the most recalcitrant constituent – to fuels, chemicals and/or value-added substances. Lignin conversion to fuels and value-added chemicals requires a sound understanding of the structure of lignin before and after different pretreatments. In the current work, an effort has been made to compare the structural differences in isolated pine lignin after one- (alkaline) and two-step (alkaline/dilute acid and alkaline/steam explosion) pretreatments. Our results indicate removal of the low molecular weight fraction of lignin after an initial alkaline pretreatment. A subsequent dilute acid pretreatment resulted in the loss of lignin inter-unit linkages such as β-O-4’ aryl ethers. Furthermore, with a steam explosion pretreatment, lignin exhibited a competing condensation process leading to increased condensed lignin structures.},
doi = {10.1016/j.biombioe.2018.11.029},
journal = {Biomass and Bioenergy},
number = C,
volume = 120,
place = {United States},
year = {2018},
month = {12}
}

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Cited by: 6 works
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