Environmentally friendly solvent- and water-based coatings for mitigation of crystallization fouling

Abdullah Al-Janabi, M. Reza Malayeri

Research output: Contribution to journalArticle

3 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)147-154
Number of pages8
JournalChemical Engineering and Technology
Volume38
Issue number1
DOIs
Publication statusPublished - Jan 1 2015

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Keywords

  • Crystallization fouling
  • Heat exchanger fouling
  • Solvent-based coating
  • Surface energy
  • Water-based coating

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Chemistry(all)
  • Industrial and Manufacturing Engineering

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