Changes of lignin structure of poplar wood chips in autohydrolysis pretreatment and bleachability of chemi-thermomechanical pulp

Yang, Qingxiang; Chen, Yunjing; Yu, Shiyun; Hou, Qingxi; Wu, Ming; Jiang, Tong-Bao; Wang, Kaiqing; Liu, Wei

doi:10.1016/j.indcrop.2021.114420

Cited by 2 publications

(1 citation statement)

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“…In order to prevent lignin structure from being damaged during pretreatment, many lignin extraction methods have been developed such as using organic solvents (ethanol, acetic acid, and gamma-valerolactone), ionic liquids, and deep eutectic solvents (DES) (Zhuang et al, 2016). However, there are some challenges for biomass pretreatment using organic solvents concluding high cost, high energy consumption, and ammability (Yang et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

One-Step Acid Bleachable Pretreatment with a Recyclable Acid Hydrotrope and Chlorate for Biomass Valorization

Zhang

2022

Bioenerg. Res.

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Pretreatment is a necessary step to converting lignocellulosic biomass from its native form into a more accessible form for the value-added utilization of its main components. Herein, we developed a one-step acid bleachable pretreatment method using a recyclable acid hydrotrope (p-toluenesulfonic acid, p-TsOH) and chlorate to achieve the bers bleaching and lignin extraction simultaneously. Under a mild condition (C80T80t45), 84.33% of hemicellulose and 76.79% of lignin were dissolved out. The obtained dispersed bers with a high whiteness of 60.13% ISO can be used for papermaking or ethanol production. The results from quasi-simultaneous enzymatic sacchari cation and combined fermentation (Q-SSF) of the pretreated substrate indicated that the ethanol concentration and yield reached to 39.30 ± 0.57 g/L and 82.36 ± 1.15%, respectively. What's more, according to the results of lignin characterization, the aromatic rings in extracted lignin were opened forming dicarboxylic acids as well as derivatives due to the oxidation of chlorate, which is bene cial for its catalytic upgrading and composites preparation.Therefore, this study is important to valorization of lignocellulosic biomass.

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Section: Introductionmentioning

confidence: 99%