A hybrid rheological model for particulate suspension in zeolite crystal growth

Hongwei Song, Olusegun J. Ilegbusi, Albert Sacco

Research output: Contribution to journalArticle

2 Scopus citations

Abstract

A hybrid constitutive model is developed to represent the thixotropic behavior of particulate suspension during zeolite crystallization from solution. This model is valid over the complete solid fraction range typical for such a process. It employs two internal variables, agglomeration and contiguity, to describe the degree to which the gel particles form short- and long-range networks. The contiguity is used to weigh the effects of hydrodynamic to chain-like network deformation on the suspension viscosity. Heterogeneous nucleation and surface reaction-controlled crystal growth are assumed to describe the evolution of microstructure and solid fraction of gel and crystals. Such a model successfully captures the thixotropic behavior of zeolite particulate suspension by comparison of the predictions with a set of experimental data.

Original languageEnglish
Pages (from-to)562-568
Number of pages7
JournalJournal of Colloid And Interface Science
Volume295
Issue number2
DOIs
StatePublished - Mar 15 2006

Keywords

  • Gel dissolution
  • Particulate suspension
  • Rheology
  • Zeolites

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