In order to explore the potential of fruit peel waste conversion to produce high-value platform chemicals,the hydrothermal conversion of citrus peel to furfural(FF)and 5-hydrox-ymethylfurfural(5-HMF)was conducted in the choline chloride(ChCl)/carboxylic acid based deep eutectic solvents(DES)system.Conclusions can be drawn from experiments in xylose and glucose:The carboxylic acid performance was ranked lactic acid＞acetic acid＞glycolic acid.The optimal molar ratio of choline chloride to carboxylic was 1∶2.The optimal water content of solvent system was 20％.The effects of temperature and time on citrus peel conversion were studied based on the optimized operating conditions.Since the pectin component in the citrus peel was mainly converted to 5-HMF in DES,the yield of the peel converted to 5-HMF was significantly higher than that of FF.The maximum mass yield of 5-HMF from citrus peel was 8.6％(molar yield was 43.1％).The maximum mass yield of furfural reached 2.4％(molar yield was 19.1％).
关键词
低共熔溶剂/柑橘果皮/水热转化/5-羟甲基糠醛/糠醛
Key words
deep eutectic solvent/citrus peel/hydrothermal conversion/5-hydroxymethylfurfural/furfural
维普
万方数据