Prediction of optimum membrane design

Pore entrance shape and surface potential

W. Richard Bowen, Adel O. Sharif

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Particle rejection in membrane microfiltration and ultrafiltration depends on a balance between hydrodynamic and electrostatic forces. This balance defines a critical filtration velocity, which should be maximised to give fast process operation. The paper presents a quantification of the effects of pore entrance shape and membrane surface potential on these forces and on critical velocity. Three different shapes have been considered, sharp corner; rounded; and spiky. The effect of different surface potentials on the front face of the membrane and the pore wall are also considered. Repulsive electrostatic forces are found to be greatest for the spiky pore entrance. However, the greatest critical velocity is achievable for the rounded pore entrance. For such a rounded pore entrance, the benefits of a high surface potential on both the front surface of the membrane and the pore wall have been quantified.

Original languageEnglish
Pages (from-to)207-217
Number of pages11
JournalColloids and Surfaces A: Physicochemical and Engineering Aspects
Volume201
Issue number1-3
DOIs
Publication statusPublished - 5 Mar 2002
Externally publishedYes

Fingerprint

Surface potential
entrances
membranes
Membranes
porosity
Electrostatic force
predictions
critical velocity
Microfiltration
Ultrafiltration
electrostatics
Hydrodynamics
rejection
hydrodynamics

Keywords

  • Membrane
  • Microfiltration
  • Pore entrance shape
  • Rejection
  • Ultrafiltration

ASJC Scopus subject areas

  • Colloid and Surface Chemistry
  • Physical and Theoretical Chemistry

Cite this

Prediction of optimum membrane design : Pore entrance shape and surface potential. / Bowen, W. Richard; Sharif, Adel O.

In: Colloids and Surfaces A: Physicochemical and Engineering Aspects, Vol. 201, No. 1-3, 05.03.2002, p. 207-217.

Research output: Contribution to journalArticle

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