Liquid–Liquid Extraction of Biomass Pyrolysis Bio-oil
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- 作者：Yi Wei ; Hanwu Lei ; Lu Wang ; Lei Zhu ; Xuesong Zhang ; Yupeng Liu ; Shulin Chen ; Birgitte Ahring
- 刊名：Energy & Fuels
- 出版年：2014
- 出版时间：February 20, 2014
- 年：2014
- 卷：28
- 期：2
- 页码：1207-1212
- 全文大小：376K
- ISSN：1520-5029
文摘
Various organics with quite different oxygen-containing functional groups mixing together in bio-oil lead to the high instability of bio-oils. A liquid鈥搇iquid extraction method was developed to separate the bio-oil into different chemical groups by their polarities to stabilize bio-oils and improve the quality. The separated bio-oil had similar oxygen-containing functional groups in different phases. Biomass pyrolysis using Douglas fir pellet and characterization of the bio-oil chemical compounds were conducted, followed by bio-oil liquid鈥搇iquid extractions with several solvents (e.g., hexane, petroleum ether, and chloroform). In comparison to the raw bio-oil, the solvent phase had high concentrations (85%) of phenols and guaiacols, while no sugar and very low acid and alcohol contents were detected, which were left in the water phases.