INTEC   05402
INSTITUTO DE DESARROLLO TECNOLOGICO PARA LA INDUSTRIA QUIMICA
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
A CLOSED-LOOP CONTROL STRATEGY FOR REGULATION OF CHEMICAL COMPOSITION IN THE SEMI-BATCH PRODUCTION OF NITRILE-BUTADIENE RUBBER
Autor/es:
LUIS ALBERTO CLEMENTI; JORGE R. VEGA; FRANCISCO G. ROSSOMANDO; ROMINA BELEN SUVIRE
Lugar:
Bahía Blanca
Reunión:
Congreso; IX Congreso Argentino de Ingeniería Química (CAIQ 2017); 2017
Institución organizadora:
Asociación Argentina de Ingenieros Químicos (AAIQ)
Resumen:
In this work, a closed-loop control strategy is proposed for the semi-batchproduction of nitrile-butadiene rubber with reduced variability in the mass fraction of acrylonitrile bounded to the copolymer (pA(t)). The proposed methodology is based on an mathematical control law for regulating pA(t) by manipulation of the acrylonitrile feed rate, which involve two main components: i) an optimal control law, derived from a simplified mathematical model of the copolymerization process; and ii) a traditional proportional control law, for compensating the remaining errors of the simplified optimal control law.All the non-measurable state variables required in the control law were estimated through a soft-sensor implemented on the basis of a radial basis neural network. The proposal was evaluated by simulating the production of NBR of grade AJLT, with the polymerization stage represented by a detailed mathematical model that was adjusted to an industrial plant.With the implemented control scheme, simulation results showed that a total compositional drift lower than 0.75% can be achieved, thus significantly reducing the typical drift of 6% obtained in a batch process.