Hydrolysis of cellulose catalyzed by novel acidic ionic liquids

• Published in: Carbohydrate polymers Vol. 115; pp. 49 - 53
• Main Authors: Zhuo, Kelei, Du, Quanzhou, Bai, Guangyue, Wang, Congyue, Chen, Yujuan, Wang, Jianji
• Format: Journal Article
• Language: English
• Published: England Elsevier Ltd 22.01.2015
• Subjects: Acidic ionic liquid; anions; biomass; Catalyst; catalysts; catalytic activity; Cellulose; chlorides; Hydrolysis; interleukin-1; ionic liquids; nuclear magnetic resonance spectroscopy; reducing sugars; temperature; Hydrolysis; Acidic ionic liquid; Catalyst; Cellulose
• ISSN: 0144-8617; 1879-1344; 1879-1344
• DOI: 10.1016/j.carbpol.2014.08.078

•Six novel SO3H-ionic liquids based on 2-phenyl-2-imidazoline were synthesized.•Acidic ionic liquids were used as catalysts for cellulose hydrolysis in [Bmim]Cl.•Yield of total reducing sugar was dependent on IL's acidity, amount of water.•Acidic ionic liquids with anion HSO4− showed superior catalytic activity. The conversion of cellulosic biomass directly into valuable chemicals becomes a hot subject. Six novel acidic ionic liquids (ILs) based on 2-phenyl-2-imidazoline were synthesized and characterized by UV–VIS, TGA, and NMR. The novel acidic ionic liquids were investigated as catalysts for the hydrolysis of cellulose in 1-butyl-3-methylimidazolium chloride ([Bmim]Cl). The acidic ionic liquids with anions HSO4− and Cl− showed better catalytic performance for the hydrolysis of cellulose than those with H2PO4−. The temperature and dosage of water affect significantly the yield of total reducing sugar (TRS). When the hydrolysis of cellulose was catalyzed by 1-propyl sulfonic acid-2-phenyl imidazoline hydrogensulfate (IL-1) and the dosage of water was 0.2g, the TRS yield was up to 85.1% within 60min at 100°C. These new acidic ionic liquids catalysts are expected to have a wide application in the conversion of cellulose into valuable chemicals.