Traditionally, distillation column profiles have been divided into rectifying and stripping profiles, described by the liquid composition along the column. Recently, Tapp et al. (2003) defined a generalised column section and the composition profiles in these sections are described by the Difference Point Equation. Column sections can be sequenced by the designer (within certain constraints) an...

The proposed method is situated within the actual trend of integrated process control design. The paper deals with a modern research theme in plantwide control field. Within this framework, it tries to solve the problems concerning the operation of distillation columns, many of these problems deriving from design errors of control structure. Analyzing from plantwide control point of view the pl...

files. Chem. Eng. Prog. 1981, 77,4247. Skogestad, S.; Morari, M. Understanding the Dynamic Behavior of Distillation Columns. Znd. Eng. Chem. Res. 1988a, 27,1848-1862. Skogestad, S.; Morari, M. LV-Control of a High-Purity Distillation Column. Chem. Eng. Sci. 198813, 43 (I), 33-48. Strang, C. Linear Algebra and ita Applications; Harcourt Brace Jovanovich: New York, 1980. Weber, R.; Brosilow, C. B...

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 cannot simply add excess trays, as in con...

D istillation columns are considered as one of the most critical components in petroleum refineries, gas processing installations and chemical plants. Plant performance depends to a large extent on the ability of these columns to function as intended. Defective columns may lead to serious consequences to the plant operation and hence the quality of the product. Thus, when a distillation column ...

This paper presents a modern modeling approach for reactive distillation processes with potential phase splitting. It is based on a classical model (pseudo-homogeneous) in connection with a robust and reliable phase splitting algorithm (through homotopy-continuation method), performed at each simulation step. Model validation stage and a simple case-study (by applying the new approach to a reac...

The Petlyuk distillation configuration has received considerable attention because of its efficiency to reduce the energy required for the separation of ternary mixtures. The structure of the Petlyuk system offers some control challenges arising from the transfer of vapor streams back and forth between the columns. This means that neither of the columns can have a uniform lower nor higher press...

LABVIEW is a graphical programming language that has its roots in automation control and data acquisition. In this paper we have utilized this platform to provide a powerful toolset for process identification and control of nonlinear systems based on artificial neural networks (ANN). This tool has been applied to the monitoring and control of a lab-scale distillation column DELTALAB DC-SP. The ...

P arallel process units are often encountered in chemical process systems for different considerations, e.g., parallel reactors from reactor network synthesis, parallel columns for heat integration. One notable example is the feed split configuration of heatintegrated distillation columns. In this work, the control of parallel processes is illustrated with the heat-integrated distillation colum...

The development of a reactive distillation process for the production of n-butyl acetate by transesterification of methyl acetate with n-butanol is presented. Thermodynamic aspects of the quaternary system n-butyl acetate – n-butanol – methyl acetate – methanol are discussed and UNIQUAC interaction parameters derived using the Dortmund Data Bank (DDB) are given. The reaction kinetics of the het...