Two quaternary systems are studied: (1) Acetic Acid - Ethanol - Water- Ethyl Acetate and (2) Acetic Acid - Butanol - Water- Butyl Acetate. In these two systems, liquid phase esterification occurs. The residue curve map is computed using the UNIQUAC model and gas phase acetic acid dimerization. For the second system, we find a reactive azeotrope at the following transformed coordinates: X1=0.04238 and X2=0.218399.
Please visit this link for a similar treatment using Mathematica:
Housam Binous (2022). Residue Curve Map Computation using UNIQUAC Model: Case of a Quaternary Reactive System (https://www.mathworks.com/matlabcentral/fileexchange/12743-residue-curve-map-computation-using-uniquac-model-case-of-a-quaternary-reactive-system), MATLAB Central File Exchange. Retrieved .
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