Product-oriented decomposition of lignocellulose catalyzed by novel polyoxometalates-ionic liquid mixture. (July 2019)

• Record Type: Journal Article
• Authors: Shi, Nan; Liu, Dong; Huang, Qiang; Guo, Zhongshan; Jiang, Ruixue; Wang, Feng; Chen, Qingtai; Li, Min; Shen, Guobo; Wen, Fushan
• Is Part Of: Bioresource technology. Volume 283(2019)
• Page Start: 174
• Page End: 183
• Publication Date: 2019-07
• Subjects: Lignocellulose -- Product-oriented decomposition -- Ionic liquid -- Polyoxometalates; 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.2019.03.048
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: Catalyzed lignocellulose decomposition was achieved in novel POMs-ionic liquid. The yielded aromatic products included acids, ketones, aldehydes, and phenols. 4-Hydroxylbenzoic acid was mainly produced at 100 °C and high H2 O2 content. 4.3 wt% of phenols were dominatingly yielded at 140 °C with a selectivity of 45.1%. The anions of ionic liquid were crucial in effective lignocellulose decomposition. Abstract: Lignocellulose was oxidatively decomposed in a newly developed polyoxometalates-imidazolium ionic liquid mixture. Aromatic compounds covering acids, esters, ketones, aldehydes, and phenols were selectively produced under various conditions. 4-Hydroxylbenzoic acid was dominatingly yielded under low temperature and high oxidant concentration. Phenolic compounds were mainly generated at high temperature with a selectivity of 45.1% and a yield of 4.3%, higher than those generated in similar polyoxometalates-ionic liquids system. The products distributions and residues of lignocellulose decomposition under various conditions were characterized; the influences of the ionic liquids anions on the polyoxometalates-ionic liquids complex formation, the acidic and redox properties of the catalyst, and the final products were profoundly investigated; and a tentative reacting process was proposed. The ionic liquid could be recycled for five times. This work not only provided a new lignocellulose decomposition strategy to produce aromatic products, but also offered a guidance for product-oriented lignocellulose decomposition.