MODEL PREDICTIVE CONTROL AND DYNAMIC OPERABILITY STUDIES IN A STIRRED TANK: RAPID TEMPERATURE CYCLING FOR CRYSTALLIZATION.

Bunin, GeneA.; Lima, FernandoV.; Georgakis, Christos; Hunt, ChristopherM.

A stirred-tank reactor was built with the objective of rapid and accurate temperature control in the reaction vessel. A first-principles heat transfer model was developed for the jacketed batch system, with the jacket inlet temperature used to control the vessel temperature. A model predictive controller was implemented to follow a rapidly changing temperature profile that cycled between steep heating and cooling motifs, and it was tested experimentally at progressively shorter temperature cycles. For a water-solvent-water-jacket system, a cycle consisting of increasing and decreasing the temperature by 15°C over a period of 20 min was achieved in practice. The performance of the MPC controller was explained by calculating the dynamic operability characteristics of the process.

CRYSTALLIZATION; TEMPERATURE control; PREDICTIVE control systems; HEAT transfer; SOLVENTS

Chemical Engineering Communications, 2010, Vol 197, Issue 5, p733

0098-6445

Academic Journal

10.1080/00986440903288096