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The kinetics of titanium dioxide agglomeration in an agitated liquid suspension
Author(s) -
Wahl E. F.,
Baker C. G. J.
Publication year - 1971
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450490606
Subject(s) - agglomerate , suspension (topology) , titanium dioxide , volume (thermodynamics) , materials science , economies of agglomeration , coulter counter , turbulence , analytical chemistry (journal) , chromatography , mechanics , thermodynamics , chemistry , chemical engineering , composite material , mathematics , physics , engineering , microbiology and biotechnology , homotopy , biology , pure mathematics
The agglomeration of two TiO 2 pigments (0.2‐1.0μ) dispersed in an agitated 1% saline solution has been studied by a sequential count method using a Coulter counter. A model based on collision frequency due to the turbulent motion in a stirred vessel predicts the second order rate constant k to be proportional to agglomerate volume and to stirrer speed to the power 3/2. Experimental values of k were proportional to threshold volume to the power 0.79, stirrer speed to the power 1.3, and independent of TiO 2 concentration