关键词: 生物油, 萃取, 分离, 生物质

Abstract: The recent progress in separation of bio-oils by extraction worldwide was reviewed，and specifically，the extraction with water，extraction with organic solvents，reactive extraction，supercritical extraction，and extraction-column chromatography were discussed. The advantages and drawbacks of aforementioned extraction methods were summarized. Improvements in biomass fast pyrolysis itself，such as pre-treatment of feedstocks，pryolysis with catalysts，or multi-stage condensation of pyrolysis-vapor should be attempted to obtain bio-oils rich in target components to facilitate separation of bio-oils by extraction. New extraction methods，such as microwave extraction and ultrasonic extraction may be investigated to examine their effectiveness for bio-oils separation.

Key words: bio-oil, extraction, separation；biomass