ESTIMATION OF CRYSTAL SIZE DISTRIBUTION OF A BATCH CRYSTALLIZATION PROCESS USING A GROWTH SIZE DEPENDENT MODEL

A high gain observer was designed to estimate the Crystal Size Distribution in batch crystallization processes. This observer is based on a model where growth kinetics depend on crystal size. The observer is based on the discretization of population balance equations solved by the finite difference method. A reduction of the number of state variables was done in order to reduce the computation time. The observer's output allows to estimate the moments of the CSD, which are interesting for control purposes.