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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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FLOW CELL STUDIES ON FOULING CAUSED BY PROTEIN -CALCIUM PHOSPHATE DEPOSITION IN TURBULENT FLOW
R. Rosmaninho, LEPAE, Departamento de Engenharia Química, Universidade do Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
G. Rizzo, Universität Stuttgart, ITW Institut für Thermodynamik und Wärmetechnik, Pfaffenwaldring 6, D-70550 Stuttgart, Germany
H. Muller-Steinhagen, Universität Stuttgart, ITW Institut für Thermodynamik und Wärmetechnik, Pfaffenwaldring 6, D-70550 Stuttgart, Germany
L. F. Melo, LEPAE, Departamento de Engenharia Química, Universidade do Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
ABSTRACT:
A comparative study of the calcium phosphate fouling
process, with and without proteins, was carried out using
both standard 316 2R stainless steel and 2R surfaces
modified by TiN magnetron sputtering. Fouling behavior
was assessed in a heat transfer flow cell operating in the
turbulent flow regime. The fouling curves resulting from
calcium phosphate deposition in the absence of proteins
were substantially different from the ones obtained when
protein was present. In this last case, two different fouling
periods could be observed. The surface energy of the
modified materials was found to affect the deposition
parameters (rate of deposition and final amount of deposit)
leading to higher amounts of deposit on higher energy
surfaces in the absence of protein, while leading to less
deposit in its presence. The standard 316 2R substrate
proved to be less prone to fouling from protein-calcium
phosphate solutions than the TiN modified surfaces.
However, the same conclusion could not be drawn for
calcium phosphate solutions.
R. Rosmaninho, G. Rizzo, H. Muller-Steinhagen, and L. F. Melo, "FLOW CELL STUDIES ON FOULING CAUSED BY PROTEIN -CALCIUM PHOSPHATE DEPOSITION IN TURBULENT FLOW" 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/heatexchanger2007/18
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