Picture of two heads

Open Access research that challenges the mind...

The Strathprints institutional repository is a digital archive of University of Strathclyde research outputs. Strathprints provides access to thousands of Open Access research papers by University of Strathclyde researchers, including those from the School of Psychological Sciences & Health - but also papers by researchers based within the Faculties of Science, Engineering, Humanities & Social Sciences, and from the Strathclyde Business School.

Discover more...

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

Full text not available in this repository. (Request a copy from the Strathclyde author)

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.