Methodology for design and analysis of reactive distillation involving multielement systems

This work presents a new methodology for design and analysis of reactive distillation. The methodology employing the element-based approach coupled with a driving force diagram for two-element systems is extended to multielement systems commonly involved in most chemical processes. The multielement system is transformed to an equivalent binary (key) element system, and consequently graphical design is carried out to determine the number of stages, the feed stage, the minimum reflux, etc., corresponding to minimal energy consumption, based on a driving force diagram. Two case studies including methyl acetate (MeOAc) synthesis and methyl tertiary butyl ether (MTBE) synthesis are presented. It is shown that the designed column is able to satisfy desired targets with a minimum energy requirement. In addition, an improvement in design is obtained compared to the design without any considerations about nonkey components.

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