Environmentally Friendly Solvent‐ and Water‐Based Coatings for Mitigation of Crystallization Fouling |
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| Authors: | Abdullah Al‐Janabi M Reza Malayeri |
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| Affiliation: | 1. Department of Mechanical & Mechatronics Engineering, College of Engineering, Dhofar University, Salalah, Sultanate of Oman.;2. School of Chemical, Petroleum and Gas Engineering, Shiraz University, Shiraz, Iran.;3. Institute of Thermodynamics and Thermal Engineering (ITW), University of Stuttgart, Stuttgart, Germany. |
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| Abstract: | The surface properties of solvent‐based (SB) and water‐based (WB) coatings and their impact on fouling during convective heat transfer of CaSO4 solutions were investigated. Experiments demonstrated that the SB coatings had generally better non‐adhesive characteristics, especially at higher values of the electron donor component since the deposits could easily be washed away. For the SB coatings, a longer induction period compared to those of untreated surfaces was observed and a significant reduction of the fouling rate could be achieved. Further analysis of surfaces revealed that SB coatings enhanced the acid‐base repulsive force and thus reduced the deposit/solid adhesion energy. For the WB coatings, the Liftshitz‐van der Waals attractive force plays a decisive role in the adhesion process due to the higher apolar component of the surface energy. |
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| Keywords: | Crystallization fouling Heat exchanger fouling Solvent‐based coating Surface energy Water‐based coating |
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