Viscosity measurement of biodiesel at high pressure with a falling sinker viscometer

J.M. Paton, C.J. Schaschke

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

In this work, we report the measurement of the viscosity of biodiesels derived from waste cooking oil and vegetable oil under high pressure. Using a falling sinker-type viscometer, dynamic viscosity measurements were made at pressures up to 140MPa which are typically to be found in common-rail automotive diesel engines. Reproducible and reliable viscosity data were obtained from sinker fall times and calibration data. The biodiesel viscosities were compared to that of petrochemical diesel fuels also under high pressure. Both fuel types were found to increase exponentially with pressure with the biodiesels being slightly the more viscous. Above 140 MPa, a marked increase in sinker fall time was observed. This was due to a pressure-freezing effect which is known to also occur with longer chain molecules found in petrochemical diesel, oils, fatty acids and biodiesel.
LanguageEnglish
Pages1520-1526
Number of pages6
JournalChemical Engineering Research and Design
Volume87
Issue number11A
DOIs
Publication statusPublished - Nov 2009

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Biofuels
Viscometers
Viscosity measurement
Biodiesel
Viscosity
Petrochemicals
Plant Oils
Vegetable oils
Cooking
Diesel fuels
Fatty acids
Freezing
Diesel engines
Rails
Oils
Fatty Acids
Calibration
Molecules

Keywords

  • falling sinker viscometer
  • high-pressure
  • biodiesel
  • viscosity
  • biofuel

Cite this

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abstract = "In this work, we report the measurement of the viscosity of biodiesels derived from waste cooking oil and vegetable oil under high pressure. Using a falling sinker-type viscometer, dynamic viscosity measurements were made at pressures up to 140MPa which are typically to be found in common-rail automotive diesel engines. Reproducible and reliable viscosity data were obtained from sinker fall times and calibration data. The biodiesel viscosities were compared to that of petrochemical diesel fuels also under high pressure. Both fuel types were found to increase exponentially with pressure with the biodiesels being slightly the more viscous. Above 140 MPa, a marked increase in sinker fall time was observed. This was due to a pressure-freezing effect which is known to also occur with longer chain molecules found in petrochemical diesel, oils, fatty acids and biodiesel.",
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Viscosity measurement of biodiesel at high pressure with a falling sinker viscometer. / Paton, J.M.; Schaschke, C.J.

In: Chemical Engineering Research and Design, Vol. 87, No. 11A, 11.2009, p. 1520-1526.

Research output: Contribution to journalArticle

TY - JOUR

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AU - Schaschke, C.J.

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