FTIR Analysis of Products Derived from Wood Liquefaction with 1-Octanol
ZOU Xian-wu1, YANG Zhi2, QIN Te-fu1*
1. Key Laboratory of Wood Science and Technology of the State Forestry Administration, Research Institute of Wood Industry, Chinese Academy of Forestry, Beijing 100091, China 2. School of Science, Beijing Institute of Technology, Beijing 100081, China
Abstract：Solvolysis is one of the important processes of biomass liquefaction. To produce superior quality liquid biofuel from biomass under mild conditions, it is essential to exploit novel reactive liquid solvent. Furthermore, the evaluation of liquefaction efficiency is carried out mainly by the means of analysis of the products derived from biomass liquefaction. In the present study, liquefaction of poplar wood powder in acidified 1-octanol was investigated with a stainless steel autoclave. Residue, heavy oil and light oil were separated from the liquefaction products by extraction with acetone and n-hexane successively. FTIR analysis was carried out on these liquefaction compositions to illuminate the liquefaction regularities and mechanisms of cellulose, hemicellulose and lignin of wood. The results showed that liquefaction oils were complex mixture containing hydroxide, carbonyl, methoxyl, aromatic and aether. Liquefactions of cellulose and hemicellulose were easier than that of lignin. Cellulose and hemicellulose were converted to light oil, however, lignin was mainly converted to heavy oil. At 150 ℃, lignin was depolymerized and degraded into micromolecular aromatic compounds, among which condensation reactions took place when reaction temperature increased.
[1] Demirbas M F, Balat M. Energy Conversion and Management, 2006, 47(15-16): 2371. [2] JIANG Hong-tao, LI Hui-quan, ZHANG Yi(姜洪涛, 李会泉, 张 懿). Chemical Industry and Engineering Progress(化工进展), 2006, 25(1): 8. [3] Demirbas A. Energy Conversion and Management, 2001, 42(11): 1357. [4] Huber G W, Iborra S, Corma A. Chemical Reviews, 2006, 106(9): 4044. [5] Rezzoug S A, Capart R. Applied Energy, 2002, 72(3-4): 631. [6] LE Zhi-ping, ZHANG Hong, HONG Li-zhi(乐治平，张 宏，洪立智). Chemical Industry and Engineering Progress(化工进展), 2007, 26(2): 246. [7] Rezzoug S A, Capart R. Energy Conversion and Management, 2003, 44(5): 781. [8] Demirbas A. Energy Conversion and Management, 2000, 41(16): 1741. [9] Xu C, Etcheverry T. Fuel, 2008, 87(3): 335. [10] Yamazaki J, Minami E, Saka S. Journal of Wood Science 2006, 5: 527. [11] Li J, Wu L, Yang Z. Journal of Analytical and Applied Pyrolysis, 2008, 81(2): 199. [12] El Mansouri N E, Salvad J. Industrial Crops and Products, 2007, 26(2): 116. [13] Qian Y, Zuo C, Tan J, et al. Energy, 2007, 32(3): 196. [14] Zhang T, Zhou Y, Liu D, et al. Bioresource Technology, 2007, 98(7): 1454. [15] YAO Jie, XU Xin-wu, FENG Yu-ying(姚 杰, 徐信武, 冯玉英). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2003, 23(1): 58. [16] SUN Yong, ZHANG Jin-ping, YANG Gang, et al(孙 勇, 张金平, 杨 刚, 等). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2007, 27(10): 1997.
