Processes 2013, 1, 30-48; doi:10.3390/pr1020030
Density and Viscosity Measurement of Diesel
Fuels at Combined High Pressure and Elevated Temperature
Carl Schaschke
(1),*, Isobel Fletcher (1) and
Norman Glen (2)
isobel.fletcher@strath.ac.uk
carl.schaschke@strath.ac.uk
1 Department of Chemical and Process Engineering, University of Strathclyde,
Glasgow G1 1XJ, UK
2 TUV NEL Ltd., East Kilbride, Glasgow, G75 0QF, UK; E-Mail: nglen@tuvnel.com
Abstract:
Authors report the measurement of the viscosity
and density of various diesel fuels, obtained from British refineries, at
elevated pressures up to 500 MPa and temperatures in the range 298 K to 373 K.
The measurement and prediction procedures of fluid properties under high
pressure conditions is of increasing interest in many processes and systems
including enhanced oil recovery, automotive engine fuel injection, braking, and
hydraulic systems. Accurate data and understanding of the fluid characteristic
in terms of pressure, volume and temperature is required particularly where the
fluid is composed of a complex mixture or blend of aliphatic or aromatic
hydrocarbons.
In this study, high pressure viscosity data was
obtained using a thermostatically-controlled falling sinker-type high pressure
viscometer to provide reproducible and reliable viscosity data based on
terminal velocity sinker fall times. This was supported with density
measurements using a micro-pVT device. Both high-pressure devices were
additionally capable of illustrating the freezing points of the hydrocarbon
mixtures. This work has, thus, provided data that can extend the application of
mixtures of commercially available fuels and to test the validity of available
predictive density and viscosity models. This included a Tait-style equation
for fluid compressibility prediction. For complex diesel fuel compositions,
which have many unidentified components, the approach illustrates the need to
apply appropriate correlations, which require accurate knowledge or prediction
of thermodynamic properties.
Free Full Text Source: http://www.mdpi.com/2227-9717/1/2/30/pdf
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