Acid-catalysed hydrolysis kinetics of sugar cane bagasse to glucose and xylose in selected ionic liquid media

2019 5th International Conference on Environment and Renewable Energy

生态环境科学;能源学

Gao, Y.^1 ; Bandara, T.R.^1^2 ; Griffin, G.J.^1

School of Engineering, RMIT University, Melbourne, Australia^1

Faculty of Engineering, University of Sri Jayewardenepura, Ratmalana, Sri Lanka^2

关键词: 1-Butyl-3-methylimidazolium chloride;    1-ethyl-3-methylimidazolium chloride;    Ethanol fermentation;    First order reactions;    Hydrolysis kinetics;    Ionic liquid media;    Lignocellulosic biomass;    Reaction conditions;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/307/1/012005/pdf
DOI  :  10.1088/1755-1315/307/1/012005

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The process of converting lignocellulosic biomass to fuels (such as ethanol) is considered a potential method for supplanting current fossil fuels with renewable sources. A significant inhibitor to such processes is the lack of an efficient and economical means by which hemicellulose and cellulose may be hydrolysed to their constituent monosaccharides as precursors for ethanol fermentation. This research details experiments conducted by which sugar cane bagasse (SCB) immersed in ionic liquids (either 1-butyl-3-methylimidazolium chloride or 1-ethyl-3-methylimidazolium chloride - BmimCl and EmimCl respectively) were catalysed to glucose and xylose by adding variable amounts of hydrochloric acid (3.5 - 10.5wt%) at temperatures between 100°C to 140°C. Experiments were conducted over 5 hours and in all experiments the monosaccharide concentrations increased to a maximum then decreased as the monosaccharides were degraded to other products. Maximum yields of glucose and xylose of 133mg/g bagasse and 125mg/g bagasse respectively were achieved although under different reaction conditions. The kinetics of the process was modelled as a simple set of first order reactions for the conversion of biomass to sugars then the degradation of sugars to other products.