Muhammad A. Al-Arfaj

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The control of an ideal reactive distillation column is compared with that of a similar, but somewhat di2erent, real chemical system, the production of methyl acetate. Similarities and di2erences are observed. Three control structures are evaluated for both systems. A control structure with one internal composition controller and one temperature controller(More)
This paper considers the design and control of a reactive distillation column in which one reactant is consumed and two products are formed (A B+C). The volatilities are B ¿ A ¿ C , i.e. the reactant is intermediate boiling between the two products. The metathesis of 2-pentene is considered as the demonstrative example. The column has a single feed of the(More)
The choice of control structures for distillation columns is an important issue for practical industrial operation. There is no single “best” structure for all columns, so some authors feel that each column should be treated independently. Nevertheless, the objective of this work is to find for a structure that is “reasonable” for all columns. In this(More)
The dynamic behavior for a high-purity/high-conversion reactive distillation is investigated. The impact of disturbance magnitudes and directions on both open loop and closed loop stability of the system is studied. Excess of less volatile reactant in two-reactant-two-product generic reactive distillation is found to enhance open loop stability, but(More)
This paper presents a comprehensive formulation of a linearized state space process model for a generic two-reactant-two-product reactive distillation system. The development of the model requires the knowledge of the desired steady state design data, including liquid holdups and composition profiles. The application of the developed linear process model in(More)
Sneesby et al. recently suggested that adding trays in the stripping and rectifying sections of a reacti®e distillation column can degrade performance. This effect, if true, is not only counterintuiti®e, but ®ery disturbing because it suggests that the design of reacti®e distillation columns cannot use conser®ati®e estimates of tray numbers, that is, we(More)
This paper compares the closed-loop performance of three control structures using an approximate linear model to that when a rigorous nonlinear process model is used for a generic reactive distillation. It is shown that an approximate linear model behaves essentially similarly to a nonlinear model in a closed-loop system when the deviation of process(More)
Abstract This paper presents the nonlinear dynamic analysis of an ideal two-reactant-two product reactive distillation. The impact of disturbance magnitudes and directions on openloop stability of the system is studied. An analysis of the physicochemical phenomena present in reactive distillation processes that, under certain operational conditions, causes(More)
This paper studies the synthesis and the design of methanol recovery system for TAME reactive distillation process using extraction column with water as a solvent. The design of the extraction column system has not been studied in the literature. The effect of operating conditions such as solvent flowrate, extraction column temperature, and number of(More)
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