Rapid and massive fractionation of hemicelluloses for purifying cellulose at room temperature by tetramethylammonium hydroxide. (February 2023)

• Record Type: Journal Article
• Authors: Tian, Rui; Zhu, Bolang; Liu, Qiaoling; Hu, Yajie; Yang, Ziying; Rao, Jun; Wu, Yuying; Lü, Baozhong; Bian, Jing; Peng, Feng
• Is Part Of: Bioresource technology. Volume 369(2023)
• Publication Date: 2023-02
• Subjects: Tetramethylammonium hydroxide -- NaOH -- Hemicelluloses -- Cellulose -- Fractionation; 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.2022.128490
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: TMAH could rapidly and massively fractionate hemicelluloses at room temperature. The hemicellulosic fractionation effect of TMAH was better than that of NaOH. The yield of hemicelluloses fractionated with TMAH solvent could reach 81.9 %. TMAH treatment is a feasible and promising method to fractionate hemicelluloses. Abstract: The fractionation of hemicelluloses is a promising method to improve the comprehensive utilization of lignocellulosic biomass. However, the effective fractionation of hemicelluloses is always limited by the structural complexity and easy degradability. In this study, tetramethylammonium hydroxide (TMAH) was developed to fractionate hemicelluloses from poplar holocellulose with high molecular weights and high yields at room temperature. Approximately 90% of hemicelluloses could be dissolved at room temperature in 1 h, and the yield was up to 81.9%. Compared with the fractionation using NaOH solution, the hemicelluloses isolated by TMAH solvent showed a more complete structure and higher purity. Meanwhile, the retention rate of cellulose after treatment with TMAH was up to 90.2%, and the crystal structure of cellulose in the residues was practically unchanged. Moreover, the TMAH solvent could be recycled to fractionate hemicelluloses. The work provides an elegant and significantly efficient method towards hemicelluloses fractionation and cellulose purification.