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Title: An In-Depth Understanding of Biomass Recalcitrance Using Natural Poplar Variants as the Feedstock

Journal Article · · ChemSusChem
 [1];  [2];  [2];  [2];  [3];  [3];  [4];  [4];  [2];  [2];  [2];  [5]
  1. Univ. of Tennessee, Knoxville, TN (United States). Dept. of Chemical and Biomolecular Engineering
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). BioEnergy Science Center and Biosciences Division
  3. Georgia Inst. of Technology, Atlanta, GA (United States). Renewable Bioproducts Inst.
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). BioEnergy Science Center and Biosciences Division; National Renewable Energy Lab. (NREL), Golden, CO (United States)
  5. Univ. of Tennessee, Knoxville, TN (United States). Dept. of Chemical and Biomolecular Engineering and Biosciences Division and Inst. of Agriculture

Here, in an effort to better understand the biomass recalcitrance, six natural poplar variants were selected as feedstocks based on previous sugar release analysis. Compositional analysis and physicochemical characterizations of these poplars were performed and the correlations between these physicochemical properties and enzymatic hydrolysis yield were investigated. Gel permeation chromatography (GPC) and 13C solid state NMR were used to determine the degree of polymerization (DP) and crystallinity index (CrI) of cellulose, and the results along with the sugar release study indicated that cellulose DP likely played a more important role in enzymatic hydrolysis. Simons’ stain revealed that the accessible surface area of substrate significantly varied among these variants from 17.3 to 33.2 mg g$$–1\atop{biomass}$$ as reflected by dye adsorption, and cellulose accessibility was shown as one of the major factors governing substrates digestibility. HSQC and 31P NMR analysis detailed the structural features of poplar lignin variants. Overall, cellulose relevant factors appeared to have a stronger correlation with glucose release, if any, than lignin structural features. Lignin structural features, such as a phenolic hydroxyl group and the ratio of syringyl and guaiacyl (S/G), were found to have a more convincing impact on xylose release. Low lignin content, low cellulose DP, and high cellulose accessibility generally favor enzymatic hydrolysis; however, recalcitrance cannot be simply judged on any single substrate factor.

Research Organization:
National Renewable Energy Laboratory (NREL), Golden, CO (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). BioEnergy Science Center (BESC)
Sponsoring Organization:
USDOE Office of Science (SC), Biological and Environmental Research (BER)
Grant/Contract Number:
AC36-08GO28308; AC05-00OR22725
OSTI ID:
1343083
Alternate ID(s):
OSTI ID: 1337507
Report Number(s):
NREL/JA-5100-67897
Journal Information:
ChemSusChem, Vol. 10, Issue 1; ISSN 1864-5631
Publisher:
ChemPubSoc EuropeCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 75 works
Citation information provided by
Web of Science

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Cited By (14)

Key Factors Affecting the Recalcitrance and Conversion Process of Biomass journal November 2018
New Insight into Enzymatic Hydrolysis of the Rice Straw and Poplar: an In-depth Statistical Analysis on the Multiscale Recalcitrance journal January 2019
Diol pretreatment to fractionate a reactive lignin in lignocellulosic biomass biorefineries journal January 2019
Mechanism of lignocellulose modification and enzyme disadsorption for complete biomass saccharification to maximize bioethanol yield in rapeseed stalks journal January 2020
Overexpression of a Prefoldin β subunit gene reduces biomass recalcitrance in the bioenergy crop Populus journal September 2019
Study of traits and recalcitrance reduction of field-grown COMT down-regulated switchgrass journal January 2017
The effect of liquid hot water pretreatment on the chemical–structural alteration and the reduced recalcitrance in poplar journal November 2017
Comparative evaluation of Populus variants total sugar release and structural features following pretreatment and digestion by two distinct biological systems journal November 2017
Determination of optimal biomass pretreatment strategies for biofuel production: investigation of relationships between surface-exposed polysaccharides and their enzymatic conversion using carbohydrate-binding modules journal May 2018
Use of the lignocellulose-degrading bacterium Caldicellulosiruptor bescii to assess recalcitrance and conversion of wild-type and transgenic poplar journal March 2020
Lignocellulosic Biomass: Understanding Recalcitrance and Predicting Hydrolysis journal December 2019
Extraction of Cellulose Nano-Whiskers Using Ionic Liquid-Assisted Ultra-Sonication: Optimization and Mathematical Modelling Using Box–Behnken Design journal September 2019
The effect of liquid hot water pretreatment on the chemical–structural alteration and the reduced recalcitrance in poplar text January 2017
Production of Nanocellulose Using Hydrated Deep Eutectic Solvent Combined with Ultrasonic Treatment journal May 2019

Figures / Tables (17)


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