Mikro-Makro-Wechselwirkungen in strukturierten Medien und Partikelsystemen "Population Balance Modelling and Studies for the Particle Formulation in Fluidized Bed Spray Granulation

The fluidized bed spray granulation has prevailed as a continuous thermal treatment method for granular solid matter due to its high mass and heat transfer ratio, as well as due to the coupling of the wetting, drying, particle enlarging, shaping, homogenization and separation processes. In a fluidized bed, particle growth is governed by different mechanisms: granulation, coating agglomeration, attrition and breakage. This work focuses on agglomeration especially modelling and computing of population balance balance of particulate systems in connection with heat and mass transfer. Modelling of agglomeration process results in a integral differential equation. Several solution techniques of the integral differential equation were investigated. Nevertheless, it has been observed that the numerical discretized methods are appropriate for the problem and solutions are compared against analytical solution for an ideal case of agglomeration in order to access their accuracy and to give a guideline for the choice of the method. The future aim is to couple the aggregation process with heat and mass transfer phenomena. Moreover, some attrition phenomenon has been observed during the aggregation process. Following this, the aim is to model attrition along with the aggregation process.