%A YIN Hai-yun, LI Xiao-hua, FAN Yong-sheng, YU Ning, CAI Yi-xi %T Vacuum Pyrolysis Behavior of Cellulose, Xylan and Lignin and the Analysis of Liquefied Compositions %0 Journal Article %D 2015 %J Chemistry and Industry of Forest Products %R 10.3969/j.issn.0253-2417.2015.01.015 %P 94-100 %V 35 %N 1 %U {http://www.cifp.ac.cn/CN/abstract/article_2052.shtml} %8 2015-02-28 %X 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%).