生物质三组分真空热解特性及液化产物成分分析

doi:10.3969/j.issn.0253-2417.2015.01.015

Abstract

Abstract: The molecular structure of three components (cellulose, xylan, and lignin) in biomass was detected by Fourier transform infrared spectroscopy (FT-IR). The vacuum pyrolysis behavior and kinetics of the three components were investigated.The vacuum pyrolysis mechanism was studied on the basis of gas chromatography-mass spectrometer (GC-MS) analysis for bio-oils obtained from the vacuum pyrolysis. It was found that the cellulose contained molecular structures such as pyran ring and β-glucosidic bond. During the pyrolysis process temperature from 250 ℃ to 400 ℃, the yield was 73.79% and main products generated from pyrolysis were 2,5-dimethyl-furan (9.32%), hydroxyacetone (5.13%) 2,6-dimethoxy-phenol (5.72%) and levoglucosan (17.04%). Due to high content of side-chain groups, the xylan performed thermal unstability under high temperature. The main pyrolysis products were hydroxyacetone (18.42%), acetic acid (10.11%) and furfural (13.15%). Lignin contained amounts of aromatic substances, which trends to represent slow pyrolysis process and a wider range of pyrolysis temperature from 185 ℃ to 550 ℃. The solid residue from pyrolysis of lignin was up to 29.67% with the main pyrolytic products such as phenols (16.24%) and guaiacol (20.37%).

Key words: cellulose, xylan, lignin, vacuum pyrolysis, bio-oil

CLC Number:

TQ35
TK6

YIN Hai-yun, LI Xiao-hua, FAN Yong-sheng, YU Ning, CAI Yi-xi. Vacuum Pyrolysis Behavior of Cellulose, Xylan and Lignin and the Analysis of Liquefied Compositions[J]. Chemistry and Industry of Forest Products, 2015, 35(1): 94-100.

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Vacuum Pyrolysis Behavior of Cellulose, Xylan and Lignin and the Analysis of Liquefied Compositions

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