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Communication Dans Un Congrès Année : 2008

Model predictive control of free surfactant concentration in emulsion polymerization

Résumé

In emulsion polymerization processes, the surfactant concentration plays an impor- tant role in the latex stability, reaction kinetics and particle size distribution (PSD). Controlling the free surfactant concentration in the aqueous phase ensures the stability of the latex and the control of the micellar nucleation rate. The PSD is determined by particle nucleation, growth and stability which are highly nonlinear behaviors. The PSD affects the polymer rheology, adhesion, optical properties and mechanical strength. This work deals with the model predictive control (MPC) of free surfactant concentration using the surfactant feed rate as a control variable. The used strategy is a global method that aims to reduce the on-line calculation time due to the partial differential equations (PDE) model based optimization task resolution. In order to decrease the computational burden, the nonlinear PDE system is solved off-line. Then, a linearized PDE model around the previous off-line behavior is used to find the optimal variations for the on-line predictive control.
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Dates et versions

hal-00352737 , version 1 (13-01-2009)
hal-00352737 , version 2 (22-01-2009)

Identifiants

Citer

Bruno da Silva, Pascal Dufour, Nida Sheibat-Othman, Sami Othman. Model predictive control of free surfactant concentration in emulsion polymerization. International Federation of Automatic Control (IFAC) World Congress, Jul 2008, Seoul, South Korea. paper 1693, pp. 8375-8380, ⟨10.3182/20080706-5-KR-1001.1693⟩. ⟨hal-00352737v2⟩
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