Experimental and bifurcation analysis of a hybrid CSTR plant

Skupin, Piotr; Metzger, Mieczysław; Laszczyk, Piotr; Niedzwiedz, Malgorzata

doi:10.1016/j.cherd.2019.06.010

Cited by 5 publications

(1 citation statement)

References 30 publications

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“…Chemical reactors are often used as examples for non-minimum phase processes. A classical reactor in chemical engineering is the continuous stirred tank reactor (CSTR) that guarantees the same substratum concentration in all places inside the reactor due to the mixer used in these kinds of reactors [1]. In the CSTR the reactants are introduced and removed simultaneously.…”

Section: Introductionmentioning

confidence: 99%

Archives of Control Sciences

Márquez-Vera,

Màrquez-Vera,

Yakoub

et al. 2022

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Chemical processes use to be non-minimum phase systems. Thereby, they are a challenge for control applications. In this paper, fuzzy state feedback is applied in the Van de Vusse reaction that has an inverse response. The control design has an integrator to enhance the control performance by eliminating the steady-state error when a step reference is applied. An anti-windup action is used to reduce the undershoot in the system response. In practice, it is not possible to have always access to all the state variables. Thus, a fuzzy state observer is implemented via LMIs. Frequently, the papers that show similar applications present some comments about disturbance rejection. To eliminate the steady-state error when a ramp reference is used, in this work, a second integrator is aggregated. Now, the anti-windup also reduces the overshoot generated due to the usage of two integrators in the final application.

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Section: Introductionmentioning

confidence: 99%

Archives of Control Sciences

Márquez-Vera,

Màrquez-Vera,

Yakoub

et al. 2022

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Nonideal mixing effect on the input multiplicity and controller performance of CSTR based on Cholette’s model – a simulation study

Yang,

Lin,

Chien

et al. 2024

Journal of the Chinese Institute of Engineers

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Application of Cholette’s model in non-ideal mixing CSTR: a simulation study on dynamic behavior

Yang

Chien

Chou

et al. 2021

International Journal of Chemical Reactor Engineering

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Non-ideal mixing phenomena are widely found in industrial chemical reactors. In this work we derived the bifurcation formulas for a non-adiabatic CSTR with an irreversible exothermic first order reaction with the non-ideal mixing effect. This is investigated via dynamic behavior simulations based on Chollete’s model. The results show that the non-ideal mixing parameter n (the fraction of the feed entering the perfect mixing zone) determines the variation between six classified regions and dominates the dynamic behavior patterns in the steady-state response diagram. On the other hand, the phase portraits of examples verify the formulas derived in this work. We note that the non-ideal mixing effect has significant importance in CSTR design and control steps. For example, in the safe operating region for an ideal mixing CSTR, non-linear dynamics are obtained by the system under non-ideal mixing conditions (n ≠ 1). The present study has significance and help for chemical reactor design and CSTR control.

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Experimental and bifurcation analysis of a hybrid CSTR plant

Cited by 5 publications

References 30 publications

Archives of Control Sciences

Archives of Control Sciences

Nonideal mixing effect on the input multiplicity and controller performance of CSTR based on Cholette’s model – a simulation study

Application of Cholette’s model in non-ideal mixing CSTR: a simulation study on dynamic behavior

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