posted on 2018-01-04, 00:00authored byAtul H. Bari, Aniruddha B. Pandit
In this paper, a method to estimate
crystallization kinetics considering
simultaneous nucleation, growth, breakage, and agglomeration is discussed.
The crystallization process is modeled mathematically using the population
balance equation (PBE). The fixed pivot technique of discretization
is used for solving PBE, and the gPROMS parameter estimation tool
is used to estimate various kinetic parameters. Instead of estimating
all the kinetic parameters in one step, the present method focuses
on estimating kinetic parameters in three successive steps. In the
first step, primary nucleation and growth parameters can be estimated
by using simple induction time experiments. In the second step, secondary
nucleation parameters can be found out by the gPROMS parameter estimation
tool by optimizing the supersaturation profile. In the third and final
step, the breakage and agglomeration parameters can be found by the
gPROMS parameter estimation tool by optimizing the crystal size distribution.
The developed method was applied to estimate the crystallization kinetics
of the potassium sulfate–water system.