Verification of McCabe-Thiele method and determination of basic parameters of distillation by using software packages MATLAB and ChemCAD for separating of mixture n-heptanen-octane

Abstract

This paper shows the verification of the graphic McCabe-Thiele method for separating the mixture n-heptane-n-octane. Verification of McCabe-Thiele method was performed by analytical calculations system and applying SHORTCUT methods for calculation of distillation in ChemCAD. Also, the program designed in MATLAB allows calculation of important parameters such as the minimum reflux, working reflux ratio, the theoretical number of theoretical plates, the supply of the stage, certain value, which depend largely on the reflux and the number of theoretical plates required for the separation. The paper describes the graphic dependence of parameters of interst for light volatile components, in this case n-heptane, in the supply of the mixture. At the same time, calculation was conducted for the rigorous separation condition, which demands separation of 99%, and for less rigorous separation condition, with separation of 95%. .