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High shear granulation of dolomite – I : Effect of shear regime on process kinetics (CROSBI ID 187670)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

Žižek, Krunoslav ; Hraste, Marin ; Gomzi, Zoran High shear granulation of dolomite – I : Effect of shear regime on process kinetics // Chemical engineering research & design, 91 (2013), 1; 70-86

Podaci o odgovornosti

Žižek, Krunoslav ; Hraste, Marin ; Gomzi, Zoran

engleski

High shear granulation of dolomite – I : Effect of shear regime on process kinetics

Wet granulation of previously unreported formulation system is presented. Dolomite powder is granulated under different shear regimes by using three-component binder formulation, water- molasses-polyvinylpyrrolidone. 1-D discretized population balance equation (PBE) and Equi- Partition of Kinetic Energy (EKE) coalescence kernel are applied to modelling granulation in a high shear mixer. Process modelling is focused to simulation of changes of the property of a group of entities, granule size distribution (GSD). The GSD predictions indicate the presence of coalescence growth as a dominant mechanism in the dolomite granulation process. Minor deviations between simulated and real GSDs signify the probability of other granulation mechanism(s) existence. A posteriori approach by integral method was used for coalescence rate constant estimation. This research highlights discrepancy in the coalescence rate of dolomite granulation process, between its early and later stages. Moreover, kinetic analysis of the high shear granulation process provides quantification of the macroscopic variable (impeller speed) influence on regarded property of a group of granules in terms of values of growth rate parameter.

high shear granulation; Dolomite; granule size distribution; population balance; process modelling; shear regime

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Podaci o izdanju

91 (1)

2013.

70-86

objavljeno

0263-8762

Povezanost rada

Kemijsko inženjerstvo

Indeksiranost