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

Paton, J.M. and Schaschke, C.J. (2009) Viscosity measurement of biodiesel at high pressure with a falling sinker viscometer. Chemical Engineering Research and Design, 87 (11A). pp. 1520-1526. ISSN 0263-8762

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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.

Item type: Article
ID code: 14348
Keywords: falling sinker viscometer, high-pressure, biodiesel, viscosity, biofuel, Chemical engineering, Chemical Engineering(all), Chemistry(all)
Subjects: Technology > Chemical engineering
Department: Faculty of Engineering > Chemical and Process Engineering
Related URLs:
    Depositing user: Professor C.J. Schaschke
    Date Deposited: 22 Jan 2010 10:26
    Last modified: 05 Sep 2014 00:06
    URI: http://strathprints.strath.ac.uk/id/eprint/14348

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