Molecular composition of oxygenated compounds in fast pyrolysis bio-oil and its supercritical fluid extracts

被引：54
作者：
Cheng, Tingting [1 ]
Han, Yehua [1 ]
Zhang, Yanfen [1 ]
Xu, Chunming [1 ]
机构：
[1] China Univ Petr, State Key Lab Heavy Oil Proc, Beijing 102249, Peoples R China
来源：
FUEL | 2016年 / 172卷
基金：
北京市自然科学基金; 中国国家自然科学基金;
关键词：
Bio-oil; Fourier transform ion cyclotron resonance mass spectrometry; Supercritical fluid extraction; Oxygenated compounds; Selective extraction; 2-DIMENSIONAL GAS-CHROMATOGRAPHY; MASS-SPECTROMETRY; PART; BIOMASS; SEPARATION; LIQUIDS; REACTOR; GC/MS; WOOD;
D O I：
10.1016/j.fuel.2015.12.075
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
A three-step supercritical CO2 extraction was used for selective fractionation of fast pyrolysis bio-oil. Oxygen-containing compounds in bio-oil and its fractions were characterized using infrared spectroscopy (IR), H-1 nuclear magnetic resonance spectroscopy (NMR), gas chromatography-mass spectrometry (GC-MS) and negative-ion electrospray ionization (ESI) Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS). With appropriate optimization of extraction parameters, lipids, hemicellulose, lignin and condensed aromatics were found enriched in three different fractions. The molecular composition and compound classes were identified by combined analytical techniques, and the selectivity of the fractionation was proved. The compound-type-specific fractionation also facilitated the following characterization and provided insights into the chemical composition of bio-oil. Results indicated that CO2 supercritical fluid extraction was potential for bio-oil preprocessing. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码：49 / 57
页数：9
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