Efficient separation of bagasse lignin by freeze–thaw-assisted p-toluenesulfonic acid pretreatment. (May 2022)

• Record Type: Journal Article
• Authors: Zeng, Huali; Liu, Baojie; Li, Jiao; Li, Mei; Peng, Meijiao; Qin, Chengrong; Liang, Chen; Huang, Caoxing; Li, Xinping; Yao, Shuangquan
• Is Part Of: Bioresource technology. Volume 351(2022)
• Publication Date: 2022-05
• Subjects: Bagasse -- Lignin -- Freeze-thawing -- P-toluenesulfonic acid pretreatment -- Separation -- Extraction; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2022.126951
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: Lignin was separated by freeze–thaw assisted p -TsOH pretreatment. The separation yield of lignin was 89.76%. The concentration of p -TsOH was reduced to 60%. A green and efficient lignin separation method was obtained. Abstract: Lignin separation is an important procedure that benefits multiple industries and in particular biomass transformation efforts. In this study, bagasse lignin was separated by freeze–thaw-assisted p -toluenesulfonic acid ( p -TsOH) pretreatment. The optimal conditions were freezing temperature −60 °C, freezing time 8.0 h, thawing temperature 15 °C, p -TsOH concentration 60%, pretreatment temperature 70 °C, and time 20 min. Lower acid concentrations and temperatures were used compared with traditional p -TsOH pretreatment. The efficiency and selectivity of lignin separation were improved. It was attributed to freeze-thawing, which provided a more efficient physical channel for the effective penetration of p -TsOH. The separation, extraction and purity of lignin were improved to 89.76%, 78.22% and 77.89%, respectively. High separation, high extraction, high purity and large molecular weight lignin samples were obtained. In addition, the recovery and reuse of p -TsOH was enhanced. This provided a new method for the efficient and clean separation of lignin.