**2.1 Column configuration**

The method used for the simulation is the UNIQAC method, RadFrac model is used for the design of RDWC and Hi-RDWC in ASPEN simulation. The UNIFAC method is used for the estimate of activity coefficients calculated on the idea that a fluid mixture might be measured as a result of the structural elements after which the particles are produced slightly than a result of the particles themselves. The RadFrac model is the chief partition block option in Aspen Plus. The block option can execute sizing, simulation, rating of the tray, and packed columns. The ideal requirement, completed in the Format form, needs full conditions of column structure, feed, product, and any side streams. The feed material was methanol and acetic acid. The detailed operating parameters are shown in **Table 1.**
