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          Institute: MPI für Dynamik komplexer technischer Systeme     Collection: Other publications of the MPI staff     Display Documents

ID: 113130.0, MPI für Dynamik komplexer technischer Systeme / Other publications of the MPI staff
Synthesis of ETBE : residue curve maps for the heterogeneously catalyzed reactive distillation process
Authors:Thiel, C.; Sundmacher, K.; Hoffmann, U.
Date of Publication (YYYY-MM-DD):1997
Title of Journal:Chemical Engineering Journal
Issue / Number:3
Start Page:181
End Page:191
Review Status:not specified
Audience:Experts Only
Intended Educational Use:No
Abstract / Description:The liquid phase synthesis of octane-enhancing thers is increasingly realized as a reactive distillation process, catalysed by ion exchange resins. To study the physical and chemical phenomena occurring in these systems, the present paper considers a reactive batch distillation process in a heated still. Because of its increasing technical importance, the synthesis of ETBE (ethyl tertiary butyl ether) from ethanol and isobutene is investigated as an example. The developed model is based on the phase equilibrium between the liquid and vapour phases and an adequate kinetic formulation of the heterogeneously catalysed etherification by application of generalized Langmuir-Hinshelwood rate expressions. To describe the non-ideal mixture behavior, the liquid phase activities are introduced. Simulation results show that the shape of the residue curve depends on two essential parameters: the Damkohler number, Da, and the operating pressure, p. The values of these parameters influence the existence and the position of fixed points in the residue curve map. Therefore an analysis is carried out to calculate the steady state solutions in the reactive mixture and to forecast the number of stable nodes with given Da and p.
External Publication Status:published
Document Type:Article
Communicated by:Elke Bauch
Affiliations:MPI für Dynamik komplexer technischer Systeme/Other publications of the MPI staff
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