TY - JOUR
T1 - Effects of high-pressure homogenization on physicochemical properties and storage stability of switchgrass bio-oil
AU - He, Ronghai
AU - Ye, X. Philip
AU - Harte, Federico
AU - English, Burton
N1 - Funding Information:
We cordially thank the Tennessee Agricultural Experiment Station for financial support and Dr. Yonghao Li (Department of Entomology & Plant Pathology, University of Tennessee) for imaging analysis of bio-oil particles.
PY - 2009/3
Y1 - 2009/3
N2 - 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 °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.
AB - 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 °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.
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U2 - 10.1016/j.fuproc.2008.11.003
DO - 10.1016/j.fuproc.2008.11.003
M3 - Article
AN - SCOPUS:60049098356
SN - 0378-3820
VL - 90
SP - 415
EP - 421
JO - Fuel processing technology
JF - Fuel processing technology
IS - 3
ER -