Integrated pretreatment of poplar biomass employing p-toluenesulfonic acid catalyzed liquid hot water and short-time ball milling for complete conversion to xylooligosaccharides, glucose, and native-like lignin

文献类型： 外文期刊

第一作者： Liu, Dan

作者： Liu, Dan;Zhang, Yinchao;Madadi, Meysam;Qin, Yuanhang;Karimi, Keikhosro;Tabatabaei, Meisam;Gupta, Vijai Kumar;Aghbashlo, Mortaza;Zahoor, Sameh Samir;Ali, Sameh Samir;Zahoor, Sameh Samir;Ali, Sameh Samir

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关键词： Lignocellulose biomass; Integrated pretreatment; Enzymatic saccharification; High-class lignin; Lignin antioxidant activity

期刊名称：BIORESOURCE TECHNOLOGY （ 影响因子：11.4； 五年影响因子：10.6 ）

ISSN： 0960-8524

年卷期： 2023 年 384 卷

页码：

收录情况： SCI

摘要： This work aimed to study an integrated pretreatment technology employing p-toluenesulfonic acid (TsOH)catalyzed liquid hot water (LHW) and short-time ball milling for the complete conversion of poplar biomass to xylooligosaccharides (XOS), glucose, and native-like lignin. The optimized TsOH-catalyzed LHW pretreatment solubilized 98.5% of hemicellulose at 160 degrees C for 40 min, releasing 49.8% XOS. Moreover, subsequent ball milling (20 min) maximized the enzymatic hydrolysis of cellulose from 65.8% to 96.5%, owing to the reduced particle sizes and cellulose crystallinity index. The combined pretreatment reduced the crystallinity by 70.9% while enlarging the average pore size and pore volume of the substrate by 29.5% and 52.4%, respectively. The residual lignin after enzymatic hydrolysis was rich in 13-O-4 linkages (55.7/100 Ar) with less condensed structures. This lignin exhibited excellent antioxidant activity (RSI of 66.22) and ultraviolet absorbance. Thus, this research suggested a sustainable waste-free biorefinery for the holistic valorization of biomass through two-step biomass fractionation.

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