A hybrid rheological model for particulate suspension in zeolite crystal growth

    Authors

    H. W. Song; O. J. Ilegbusi;A. Sacco

    Comments

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    Abbreviated Journal Title

    J. Colloid Interface Sci.

    Keywords

    zeolites; particulate suspension; rheology; gel dissolution; SEMISOLID SLURRIES; FLOW BEHAVIOR; ALLOY; Chemistry, Physical

    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. (c) 2005 Elsevier Inc. All rights reserved.

    Journal Title

    Journal of Colloid and Interface Science

    Volume

    295

    Issue/Number

    2

    Publication Date

    1-1-2006

    Document Type

    Article

    Language

    English

    First Page

    562

    Last Page

    568

    WOS Identifier

    WOS:000235744600030

    ISSN

    0021-9797

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