Combined high pressure and low temperature viscosity measurement of biodiesel

C.J. Schaschke, L. X. Robertson

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

In this work, we report the measurement of the viscosity of biodiesel derived from sunflower oil and biodiesel blend with mineral diesel under combined conditions of high pressure and subambient temperature. Using a thermostatically controlled falling sinker-type viscometer, dynamic viscosity measurements were made at pressures up to 153 MPa, which are typical of those found in common-rail automotive diesel engines, and temperatures down to 0 °C. Reproducible and reliable viscosity data was obtained from sinker fall times. Calibration of the viscometer was based on n-dodecane. Biodiesel viscosities were found to increase exponentially with both rising pressure and reducing temperature. When combined with mineral diesel as a B20 blend, the viscosity was found to be less than for B100 for all temperatures considered. Both pressure and thermal freezing were found to also occur with increasing pressure and lowering temperature.
LanguageEnglish
JournalEnergy and Fuels
VolumeArticle ASAP
DOIs
Publication statusPublished - Nov 2009

Fingerprint

Biofuels
Viscosity measurement
Biodiesel
Temperature measurement
Viscosity
Viscometers
Minerals
Temperature
Sunflower oil
Freezing
Diesel engines
Rails
Calibration

Keywords

  • biodiesel
  • viscosity
  • high pressure
  • low temperature

Cite this

Schaschke, C.J. ; Robertson, L. X. / Combined high pressure and low temperature viscosity measurement of biodiesel. In: Energy and Fuels. 2009 ; Vol. Article ASAP.
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Combined high pressure and low temperature viscosity measurement of biodiesel. / Schaschke, C.J.; Robertson, L. X.

In: Energy and Fuels, Vol. Article ASAP, 11.2009.

Research output: Contribution to journalArticle

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AU - Robertson, L. X.

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AB - In this work, we report the measurement of the viscosity of biodiesel derived from sunflower oil and biodiesel blend with mineral diesel under combined conditions of high pressure and subambient temperature. Using a thermostatically controlled falling sinker-type viscometer, dynamic viscosity measurements were made at pressures up to 153 MPa, which are typical of those found in common-rail automotive diesel engines, and temperatures down to 0 °C. Reproducible and reliable viscosity data was obtained from sinker fall times. Calibration of the viscometer was based on n-dodecane. Biodiesel viscosities were found to increase exponentially with both rising pressure and reducing temperature. When combined with mineral diesel as a B20 blend, the viscosity was found to be less than for B100 for all temperatures considered. Both pressure and thermal freezing were found to also occur with increasing pressure and lowering temperature.

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KW - low temperature

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