Pattern-based predictive control for ETBE reactive distillation

Abstract

Synthesis of ethyl tert-buty ether (ETBE), a high-performance fuel additive, through reactive distillation (RD) is an attractive route, while its operation and control are exceptionally difficult due to its functional combination and complex dynamics. Modern control technology greatly relies on good process models, while a reasonable RD model is too complex for control design. Moreover, RD contains considerable uncertainties that cannot be well described in process modelling. Alleviating the model requirement, this work aims to maintain the product purity in RD of ETBE through developing a pattern-based predictive control (PPC) scheme. Process dynamics, control structure, nonlinear transformation, feature pattern extraction, and pattern-based prediction and its incorporation with a conventional linear controller are discussed. Case studies show the effectiveness of the proposed method.

Local Adjustment and Global Adaptation of Control Periods for QoC Management of Control Systems

“…All those developments try to formulate the problems from plant models. However, accurate plant models may not always be available [45]. Avoiding the difficulties in obtaining accurate plant models and/or analytical solutions, this work develops heuristic rules to adjust control periods to achieve satisfactory QoC.…”

Modified neural network based cascaded control for product composition of reactive distillation

“…This reduced model used in nonlinear model predictive control for esterifi cation reaction in batch column. To overcome with various disturbances and to maintain set point tracking in reactive distillation column, Tian et al 5 has developed Pattern-based Predictive Control (PPC) scheme based on Fuzzy logic rules. This scheme has been developed for control of the purity of the ETBE reactive distillation process.…”

Process Optimization of MTBE Reactive Distillation Using GSA

“…In a liquid-phase reaction systems, Reactive distillation play a very useful role as the reaction must be carried out with a large excess of one or more of the reactants. The basic etherification reaction between mixed isobutene with methanol to produce Methyl-Tert-Butyl-Ether (MTBE) in the presence of a strong acid catalyst [3].…”