Structural changes of lignins in natural Populus variants during different pretreatments

Haitao Yang; Chang Geun Yoo; Xianzhi Meng; Yunqiao Pu; Wellington Muchero; Gerald A. Tuskan; Timothy J. Tschaplinski; Arthur J. Ragauskas; Lan Yao

doi:10.1016/j.biortech.2019.122240

Structural changes of lignins in natural Populus variants during different pretreatments

Haitao Yang, Chang Geun Yoo, Xianzhi Meng, Yunqiao Pu, Wellington Muchero, Gerald A. Tuskan, Timothy J. Tschaplinski, Arthur J. Ragauskas, Lan Yao

Research output: Contribution to journal › Article › peer-review

73 Scopus citations

Abstract

In the present study, three leading pretreatment technologies including dilute acid (DA), liquid hot water (LHW), and organosolv pretreatments (OS) were applied on two Populus natural variants with different recalcitrance. The structural features of the isolated lignins were analyzed accordingly. All the studied pretreatments reduced the molecular weights of the lignins. Aliphatic OH was reduced while phenolic OH was increased in all pretreated lignins. HSQC analysis revealed that pretreatment influenced the lignin composition and relative distribution of inter-unit linkages. The lignin S/G ratio was found to increase during DA pretreatment, while it was decreased after LHW and OS pretreatment. LHW pretreatment also resulted in much less cleavage of β-O-4 linkage than the other two pretreatments. These results could offer guidelines on appropriate selection of biomass and pretreatment technology in the future biorefinery process.

Original language	English
Article number	122240
Journal	Bioresource Technology
Volume	295
DOIs	https://doi.org/10.1016/j.biortech.2019.122240
State	Published - Jan 2020

Funding

This manuscript has been authored, in part, by UT-Battelle, LLC under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy. This study was supported and performed as part of the BioEnergy Science Center (BESC) and the Center for Bioenergy Innovation (CBI). The BESC and CBI are U.S Department of Energy Bioenergy Research Centers supported by the Office of Biological and Environmental Research in the DOE Office of Science. The authors are also grateful for the support of the National Natural Science Foundation of China (No. 21978074, 31500496), key project of Hubei Provincial Department of Education (NO. D20161402) and Foundation of Hubei Provincial Key Laboratory of Green Materials for Light Industry (No. 201907B01, 201806A03). This manuscript has been authored, in part, by UT-Battelle, LLC under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy. This study was supported and performed as part of the BioEnergy Science Center (BESC) and the Center for Bioenergy Innovation (CBI). The BESC and CBI are U.S Department of Energy Bioenergy Research Centers supported by the Office of Biological and Environmental Research in the DOE Office of Science. The authors are also grateful for the support of the National Natural Science Foundation of China (No. 21978074 , 31500496 ), key project of Hubei Provincial Department of Education (NO. D20161402 ) and Foundation of Hubei Provincial Key Laboratory of Green Materials for Light Industry (No. 201907B01 , 201806A03 ).

Keywords

Lignin
Natural Populus variants
Pretreatment
Recalcitrance
S/G ratio

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10.1016/j.biortech.2019.122240

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title = "Structural changes of lignins in natural Populus variants during different pretreatments",

abstract = "In the present study, three leading pretreatment technologies including dilute acid (DA), liquid hot water (LHW), and organosolv pretreatments (OS) were applied on two Populus natural variants with different recalcitrance. The structural features of the isolated lignins were analyzed accordingly. All the studied pretreatments reduced the molecular weights of the lignins. Aliphatic OH was reduced while phenolic OH was increased in all pretreated lignins. HSQC analysis revealed that pretreatment influenced the lignin composition and relative distribution of inter-unit linkages. The lignin S/G ratio was found to increase during DA pretreatment, while it was decreased after LHW and OS pretreatment. LHW pretreatment also resulted in much less cleavage of β-O-4 linkage than the other two pretreatments. These results could offer guidelines on appropriate selection of biomass and pretreatment technology in the future biorefinery process.",

keywords = "Lignin, Natural Populus variants, Pretreatment, Recalcitrance, S/G ratio",

author = "Haitao Yang and Yoo, {Chang Geun} and Xianzhi Meng and Yunqiao Pu and Wellington Muchero and Tuskan, {Gerald A.} and Tschaplinski, {Timothy J.} and Ragauskas, {Arthur J.} and Lan Yao",

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doi = "10.1016/j.biortech.2019.122240",

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AU - Yang, Haitao

AU - Yoo, Chang Geun

AU - Meng, Xianzhi

AU - Pu, Yunqiao

AU - Muchero, Wellington

AU - Tuskan, Gerald A.

AU - Tschaplinski, Timothy J.

AU - Ragauskas, Arthur J.

AU - Yao, Lan

PY - 2020/1

Y1 - 2020/1

N2 - In the present study, three leading pretreatment technologies including dilute acid (DA), liquid hot water (LHW), and organosolv pretreatments (OS) were applied on two Populus natural variants with different recalcitrance. The structural features of the isolated lignins were analyzed accordingly. All the studied pretreatments reduced the molecular weights of the lignins. Aliphatic OH was reduced while phenolic OH was increased in all pretreated lignins. HSQC analysis revealed that pretreatment influenced the lignin composition and relative distribution of inter-unit linkages. The lignin S/G ratio was found to increase during DA pretreatment, while it was decreased after LHW and OS pretreatment. LHW pretreatment also resulted in much less cleavage of β-O-4 linkage than the other two pretreatments. These results could offer guidelines on appropriate selection of biomass and pretreatment technology in the future biorefinery process.

AB - In the present study, three leading pretreatment technologies including dilute acid (DA), liquid hot water (LHW), and organosolv pretreatments (OS) were applied on two Populus natural variants with different recalcitrance. The structural features of the isolated lignins were analyzed accordingly. All the studied pretreatments reduced the molecular weights of the lignins. Aliphatic OH was reduced while phenolic OH was increased in all pretreated lignins. HSQC analysis revealed that pretreatment influenced the lignin composition and relative distribution of inter-unit linkages. The lignin S/G ratio was found to increase during DA pretreatment, while it was decreased after LHW and OS pretreatment. LHW pretreatment also resulted in much less cleavage of β-O-4 linkage than the other two pretreatments. These results could offer guidelines on appropriate selection of biomass and pretreatment technology in the future biorefinery process.

KW - Lignin

KW - Natural Populus variants

KW - Pretreatment

KW - Recalcitrance

KW - S/G ratio

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Structural changes of lignins in natural Populus variants during different pretreatments

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Keywords

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