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Comparison of three accelerated aging procedures to assess bio-oil stability

Authors
Journal
Fuel
0016-2361
Publisher
Elsevier
Publication Date
Volume
89
Issue
10
Identifiers
DOI: 10.1016/j.fuel.2010.03.033
Keywords
  • Pyrolysis
  • Stability
  • Thermal
  • Oxidative
  • Accelerated Aging

Abstract

Abstract The current study utilizes three stability ranking methods to compare oxidative and thermal stability of alcohol-stabilized and un-stabilized slow pyrolysis bio-oil. Procedures were based on standard methods established by ASTM (D5304 and E2009) for hydrocarbon fuels and on a widely used method that assesses viscosity change over time. Each method involves an accelerated aging procedure ranging from several minutes to 24 h. Average stability rankings for bio-oils produced from two biomass feedstock (pine and peanut hull) in two pyrolysis units were compared. Bio-oils in order from most to least stable included; methanol-stabilized pine pellet oil, un-stabilized pine pellet oil, ethanol spray-condensed pine pellet oil, methanol-stabilized peanut hull oil, and un-stabilized peanut hull pellet oil. FT-IR spectra from pre- and post-aging showed an increase in the relative concentration of C–O (phenols, carboxylic acids, esters, and ethers) and C O (carbonyl) functional groups for aged samples.

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