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Publication Citation: Density, Speed of Sound, and Viscosity Measurements of Reference Materials for Biofuels

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Author(s): Arno R. Laesecke; Tara J. Fortin; Jolene D. Splett;
Title: Density, Speed of Sound, and Viscosity Measurements of Reference Materials for Biofuels
Published: February 10, 2012
Abstract: Measurements of density, speed of sound, and viscosity have been carried out on liquid standard reference materials for biofuels as a function of temperature at ambient pressure. The samples included anhydrous and hydrated bioethanol and two biodiesels from different feedstocks, soy and animal fat. The ethanol samples were measured from a maximum temperature of 60 °C to 5 °C (speed of sound) and to -10 °C (density and viscosity), respectively. The biodiesel samples were characterized from 100 °C (density and viscosity) and from 70 °C (speed of sound) to 10 °C (animal fat-based) and 5 °C (soy-based). Densities were measured with two vibrating-tube instruments of different accuracy. The speeds of sound were measured with a propagation-time method in an acoustic cell that was combined with one of the densimeters. Viscosities were measured with an open gravitational capillary viscometer and with a rotating concentric cylinder viscometer according to Stabinger. The measurement results are reported with detailed uncertainty analyses.
Citation: Energy and Fuels
Volume: 26
Pages: pp. 1844 - 1861
Keywords: Adjustment; Biodiesel; Bioethanol; Biofuels; Calibration; Capillary viscometer; Density; Reference materials; Rotating concentric cylinder viscometer; Speed of Sound; Stabinger viscometer; Vibrating-tube densimeter; Viscosity
Research Areas: Biofuels, Thermophysics
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