Biphasic fractionation of lignocellulosic biomass based on the combined action of pretreatment severity and solvent effects on delignification

Quan Zhang; Chenxing Dai; Xuesong Tan; Xiaojun He; Kai Zhang; Xia Xu; Xinshu Zhuang

doi:10.1016/j.biortech.2022.128477

Biphasic fractionation of lignocellulosic biomass based on the combined action of pretreatment severity and solvent effects on delignification

Bioresour Technol. 2023 Feb:369:128477. doi: 10.1016/j.biortech.2022.128477. Epub 2022 Dec 9.

Authors

Quan Zhang¹, Chenxing Dai², Xuesong Tan³, Xiaojun He⁴, Kai Zhang², Xia Xu², Xinshu Zhuang⁵

Affiliations

¹ Biochemical Engineering Research Center, Anhui University of Technology, Ma'anshan, Anhui 243002, PR China; School of Chemistry and Chemical Engineering, Anhui University of Technology, Ma'anshan, Anhui 243002, PR China; Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, CAS Key Laboratory of Renewable Energy, Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, PR China.
² Biochemical Engineering Research Center, Anhui University of Technology, Ma'anshan, Anhui 243002, PR China; School of Chemistry and Chemical Engineering, Anhui University of Technology, Ma'anshan, Anhui 243002, PR China.
³ Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, CAS Key Laboratory of Renewable Energy, Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, PR China.
⁴ School of Chemistry and Chemical Engineering, Anhui University of Technology, Ma'anshan, Anhui 243002, PR China.
⁵ Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, CAS Key Laboratory of Renewable Energy, Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, PR China. Electronic address: zhuangxs@ms.giec.ac.cn.

PMID: 36509300
DOI: 10.1016/j.biortech.2022.128477

Abstract

A novel method based on pretreatment severity and solvent effects on delignification, was introduced to pretreat and fractionate lignocellulose in a 2-phenoxyethanol (EPH) biphasic solvent system. The combined severity factor (CSF) was used to regulate pretreatment severity, and the relative energy difference (RED) of solvent system to lignin was used to evaluate solvent effects. The combined action of pretreatment severity and solvent effects on delignification was first investigated by the response surface regression analysis on the pretreatment of Amorpha. Accordingly, pretreatment and fractionation of Amorpha, poplar and corn straw were then conducted under the optimized conditions. Results showed that >99 % lignin was removed after pretreatment with CSF 3.7845 in a solvent system with RED 0.9371, and 42.94 %, 39.41 % and 70.90 % lignin from Amorpha, poplar and corn straw were respectively regenerated from organosolv liquor after fractionation. Finally, the regenerated products were characterized by FTIR, TG and GPC analysis.

Keywords: Biphasic fractionation; Delignification; Lignin; Lignocellulose; Pretreatment.

MeSH terms

Biomass
Hydrolysis
Lignin*
Solvents
Zea mays*

Substances

lignocellulose
Lignin
Solvents