Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
155822 | Chemical Engineering Science | 2012 | 10 Pages |
Crystallization processes are characterized by close interaction between particle formation and fluid flow. A detailed physical description of these processes leads to complicated high-order models whose numerical solution is challenging and computationally expensive. For advanced process control and other model based real-time applications, reduced order models are required. In this work, a reduced model for a urea crystallizer is derived from a detailed reference model with two external and one internal coordinate. Proper orthogonal decomposition is applied to all three coordinates to obtain a low-order representation of the system. Nonlinear terms are treated efficiently by best points interpolation. Simulations are carried out to show the good agreement between reduced model and reference model.
► We model a urea crystallizer for process control purposes. ► A reference crystallizer model has internal and external coordinates. ► An operator-splitting method is used to solve a coupled population balance system. ► The proposed reduction method is based on empirical basis functions. ► The reduced model shows good agreement with the reference one.