β Scribed by Johann Stichlmair; Thomas Frey
No coin nor oath required. For personal study only.
Reactive distillation, i. e. the simultaneous implementation of reaction and distillation in a counter currently operated column, ia a promising alternative to the common sequential processes. In a preceding paper the effective phase equilibrium of a reactive distillation has been studied with a special focus on the determination of so called reactive azeotropes. In this contribution knowledge of these thermodynamic fundamentals is applied to the conceptual design of reactive distillation processes. Furthermore, some process examples of technical importance are presented.
Reactive distillation is the simultaneous implementation of reaction and distillation within a countercurrent column. A preceding publication focused on the thermodynamics of reactive distillation. It was shown that a system's phase equilibrium can be represented by so-called reactive distillation lines that enable the determination of possible products. Hence, knowledge of reactive distillation lines is the basis required for the design of such processes. An important boundary condition is the existence of reactive azeotropes which occur when the concentration change due to distillation is compensated for by the concentration change resulting from the chemical reaction. Reactive azeotropes are reactive distillation inhibitors. This paper will demonstrate how knowledge of reactive distillation lines and potential reactive azeotropes can be used for the systematic design of reactive distillation processes. To begin with, a general approach will be presented using systems with varying reaction mechanisms. This will then be followed by several well-known processes of technical importance.
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## Abstract Graphical trayβbyβtray methods for reactive distillation columns we developed previously are extended to study two industrial processes: MTBE production and methyl acetate production. As both processes involve four components, projection was used to obtain ternary diagrams by ignoring t