Configurations of binary distillation column for optimal control

Khelassi, A.; Schulte, Horst; Benhalla, A.

doi:10.1109/control.2012.6334731

Cited by 3 publications

(2 citation statements)

References 9 publications

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“…Several solutions are presented in literature to overcome this problem. Choosing the best configuration that presents the small level of interaction is one of possible ways that designers and engineers take into consideration, however this method presents some limitations according to the tools used to assess the interactions and the difficulties faced in the implementation of some control schemes, since there are some configurations that can be deduced theoretically and might give good results but it cannot be implemented due to some other practical limitations (Kurt and Kurt 1990;Xiong et al 2005;Deeptanshu et al 2011;Khelassi et al 2012;Sujatha and Panda 2013;Potts et al 2015). Another possible way is the use of de-couplers, this method and similar to the first presents very good results in the theoretical part but in the realisation part still face many difficulties (Garrido et al 2012).…”

Section: Introductionmentioning

confidence: 98%

Contribution to improve the dynamic control of a binary distillation column

Schulte

Bentarzi

2016

Int J Syst Assur Eng Manag

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Conventionally, steady state design for distillation column is often completed before dynamics and control issues are considered. The aim of this paper is to use the design issues as a tool to improve dynamic behavior of binary distillation column. The idea is augmenting the liquid holdup in the feed plate through a middle vessel. The degree of interactions between the loops are examined for five well known control schemes by considering different quantities of liquid holdup in the feed plate. Simulation results show that augmenting the hold-up in the feed plate will lead to minimize the interactions between the loops in all cases particularly for DV control scheme where a total decoupling is achieved.

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Section: Introductionmentioning

confidence: 98%

Contribution to improve the dynamic control of a binary distillation column

Schulte

Bentarzi

2016

Int J Syst Assur Eng Manag

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“…Fundamentals on two-products distillation control have been extensively revised, some indispensable reference works are those of [28][29][30][31][32][33][34][35][36][37][38][39][40][41][42]. The classical approach to control multi-variable distillation processes is to treat a decoupled control system, and different configurations can be useful in different scenarios to address interaction between variables and between control loops.…”

Section: Introductionmentioning

confidence: 99%

Control Structures Evaluation for a Salt Extractive Distillation Pilot Plant: Application to Bio-Ethanol Dehydration

et al. 2017

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This paper addresses the challenge of evaluating control structures for a salt extractive distillation column producing absolute ethanol for use as biofuel. A sensitivity analysis aided with designing a pseudo-binary distillation pilot plant and examining the conceived process and the influence of the reflux ratio on both product purity and energy consumption. We compare three control structures for inferential tracking of the distillate composition: a dual-temperature control with an RV (reflux/boilup) structure and two single-end temperature control configurations, and their performance is measured using deterministic indicators. The result is the proposal of a pilot plant design for treating 15 kg/h of a diluted mixture with mole fraction of ethanol equal to 0.2 and assuming a column efficiency of 50%. The R/F (reflux to feed ratio) configuration is the best control structure, given that its corresponding performance indicators conduct lowest steady-state errors, less oscillating responses, and reduced settling times. For this configuration, the reflux flow rate is rationed to the feed flow rate, and the temperature is controlled manipulating the distillate flow rate. Even subject to perturbations, the energy consumption of the plant remains close to the nominal value. The three evaluated control structures consistently met international quality standards for fuel ethanol and enhanced the use of salts in ethanol dehydration.

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