期刊
FUEL PROCESSING TECHNOLOGY
卷 90, 期 3, 页码 415-421出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.fuproc.2008.11.003
关键词
Bio-oil; High-pressure homogenization; Physicochemical properties; Stability
资金
- Tennessee Agricultural Experiment Station
A high-pressure homogenization (HPH) technique was used to improve the physicochemical properties and storage stability of switchgrass bio-oil. The viscosity, ethanol-insoluble fraction, and mass average molecular weight (Mw) of the bio-oil decreased significantly, and particle size became smaller after HPH processing; however, no significant changes were detected in heating value, water content, density, pH value, or ash content. The bio-oil's chemical composition changed after HPH: amounts of some compounds (furfural, levoglucosan, diethoxymethyl acetate, and lignin-derived compounds) increased, while others (acetic acid and 1,2-ethanediol) decreased. The homogenization processing remarkably improved switchgrass bio-oil stability: the viscosity of bio-oil homogenized at 100 MPa increased by only 13.9% after storage at 40 degrees C for 60 days, whereas that of unhomogenized oil increased 56% after the same storage period. The operating cost was very modest at only $0.0102/L for bio-oil HPH processing at 100 MPa. (c) 2008 Elsevier B.V. All rights reserved.
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