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Filtrodynamics 2: Effects of Particle Size and Filter Type on Trans‐Filter Time‐Dependent Pressure Signals
Author(s) -
Dufrechou Marie,
Mignard Emmanuel,
Drenski Michael F.,
Reed Wayne F.
Publication year - 2014
Publication title -
macromolecular reaction engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.37
H-Index - 32
eISSN - 1862-8338
pISSN - 1862-832X
DOI - 10.1002/mren.201300185
Subject(s) - frit , membrane , filtration (mathematics) , permeability (electromagnetism) , membrane filter , materials science , particle size , spheres , filter (signal processing) , particle (ecology) , analytical chemistry (journal) , chemistry , chromatography , composite material , physics , mathematics , engineering , biochemistry , geology , electrical engineering , statistics , oceanography , astronomy
Filtrodynamic behavior of trans‐filter time‐dependent pressure signals Δ P ( t ) is determined for membrane and frit filters using latex spheres of varying diameter D . Membrane data are best interpreted via a time‐dependent, accreting filtration bed, based on Darcy's law. A single parameter, permeability k , describes each membrane/particle pair. For small particles, k increases with increasing D , then becomes D ‐independent for large ones. Predictable behavior for polydisperse mixtures of small spheres is obtained. The mechanism and behavior of filtration for non‐membrane metallic frits is dramatically different, and better described by a previous “characteristic loading” model. Use of frit and membrane filters in series allowed monitoring each filter's separate response to particle accumulation.