Singularity Analysis of a One-Stage Column

Due to the simplicity of the model, the phenomena causing multiplicity can easily be verified. The multiplicity is caused by the relations between the heat of vaporization and the boiling points of the educts, which are Tfl MeOH f s.PA and AH MeOH ffvFA- Such relations have also been identified by Jacobsen and Sko-gestad [48] to cause multiplicity in a separation of non-reacting binary mixtures in a one-stage column. Hence, multiplicity is not caused by the reaction but is just the result of the separation only in methyl formate synthesis. Similar results have also been foimd for the esterification of ethanol with acetic acid [25, 50]. 

3 Singularity set with organizing center for the methyl formate one stage column (left). Bifurcation diagram for the methyl formate one-stage column for a fixed reflux ratio, cross section A-A (right) 

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