A generalized population balance model for the prediction of particle size distribution in suspension polymerization reactors

In the present study, a comprehensive population balance model is developed to predict the dynamic evolution of the particle size distribution in high hold-up (e.g., 40%) non-reactive liquid–liquid dispersions and reactive liquid(solid)–liquid suspension polymerization systems. Semiempirical andphenomenological expressions are employedto d escribe the breakage andcoalescence rates of d monomer droplets in terms of the type and concentration of suspending agent, quality of agitation, and evolution of the physical, thermod ynamic andtransport properties of the polymerization system. The fixedpivot (FPT) numerical methodis appliedfor solving the population balance equation. The predictive capabilities of the present model are demonstrated by a direct comparison of model predictions with experimental data on average mean diameter and droplet/particle size distributions for both non-reactive liquid–liquid dispersions andthe free-rad ical suspension polymerization of styrene andVCM monomers. 2005 Elsevier Ltd. All rights reserved.