Qualitative analysis of products formed during the acid catalyzed liquefaction of bagasse in ethylene glycol.
Bagasse was liquefied in ethylene glycol (EG) catalyzed by sulfuric acid at 190 degrees C under atmospheric pressure. The compositions of the crude products obtained were analyzed after separating them into three fractions: a water-soluble fraction, an acetone-soluble fraction and a residue. With infrared, gel permeation chromatography and elemental analyses, the residue mainly included undissolved cellulose and lignin derivatives and the acetone-soluble fraction mainly contained lignin degradation products with high molecular weights. The water-soluble fraction, after further analyzed by GC-MS and HPLC, showed EG, diethylene glycol, EG derivatives, saccharides, alcohols, aldehydes, ketones, phenols, especially some acids such as formic acid, levulinic acid, acetic acid, oxalic acid and 2-hydroxy-butyric acid and their esters. The Higher Heating Value (HHV) of the residue and the acetone-soluble fractions were higher than that of bagasse. The results showed that some useful chemicals and biofuels could be obtained by this process.
Zhang
Ting
T
Department of Chemical Engineering, Tsinghua University, Beijing 100084, China.
Zhou
Yujie
Y
Liu
Dehua
D
Petrus
Leo
L
D002482:Cellulose / Q000737:chemistry*; D005591:Chemical Fractionation; D002850:Chromatography, Gel; D002851:Chromatography, High Pressure Liquid; D019855:Ethylene Glycol / Q000737:chemistry*; D008401:Gas Chromatography-Mass Spectrometry; D008031:Lignin / Q000032:analysis; D009930:Organic Chemicals / Q000032:analysis; D013464:Sulfuric Acids / Q000737:chemistry*; D013696:Temperature
D009930:Organic Chemicals; D013464:Sulfuric Acids; D002482:Cellulose; D008031:Lignin; C027433:bagasse; D019855:Ethylene Glycol; C033158:sulfuric acid