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Heat Exchanger Fouling and Cleaning VII
July 1-6, 2007 - Tomar, Portugal
| Editors: |
Hans Müller-Steinhagen, Institute of Technical Thermodynamics, German Aerospace Centre (DLR)
and Institute for Thermodynamics and Thermal Engineering, University of Stuttgart, Germany
M. Reza Malayeri, University of Stuttgart, Germany
A. Paul Watkinson, The University of British Columbia, Canada |
The articles for these proceedings are peer-reviewed.
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CRUDE OIL FOULING IN A PILOT-SCALE PARALLEL TUBE APPARATUS
B. D. Crittenden, Department of Chemical Engineering, University of Bath, Bath, UK, BA2 7AY
S. T. Kolaczkowski, Department of Chemical Engineering, University of Bath, Bath, UK, BA2 7AY
T. Takemoto, Department of Chemical Engineering, University of Bath, Bath, UK, BA2 7AY
D. Z. Phillips, Department of Chemical Engineering, University of Bath, Bath, UK, BA2 7AY
ABSTRACT:
Maya crude oil fouling reveals a seemingly
straightforward dependency of initial fouling rate on surface
temperature but a maximum is found in the initial fouling
rate – velocity relationship which mirrors that found in a
model chemical system of styrene polymerization. The
linear dependency of the logarithm of the pre-exponential
factor on apparent activation energy for the crude oil is also
found in the styrene system. The apparent activation energy
for the crude oil ranged from 26.4 kJ/mol at 1.0 m/s to 245
kJ/mol at 4.0 m/s. Such strong dependencies of apparent
activation energy on velocity, even at high velocity, are
consistent with Epstein’s mass transfer-reaction-attachment
model. Surface temperatures at which the fouling rate
becomes velocity-independent are 274°C and 77°C for
Maya crude oil and styrene, respectively. For surface
temperatures in excess of this isokinetic temperature, an
increase in velocity would lead to an increase in the rate of
fouling.
B. D. Crittenden, S. T. Kolaczkowski, T. Takemoto, and D. Z. Phillips, "CRUDE OIL FOULING IN A PILOT-SCALE PARALLEL TUBE APPARATUS" in "Heat Exchanger Fouling and Cleaning VII", Hans Müller-Steinhagen, Institute of Technical Thermodynamics, German Aerospace Centre (DLR)
and Institute for Thermodynamics and Thermal Engineering, University of Stuttgart, Germany
M. Reza Malayeri, University of Stuttgart, Germany
A. Paul Watkinson, The University of British Columbia, Canada
Eds, ECI
Symposium Series, Volume RP5 (2007). http://services.bepress.com/eci/heatexchanger2007/5
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