I have to simulate a ternary diagran from acetic acid, water and ethyl acetate. I need to have it in mass frac, but aspen plus gives it in mole frac and I can't find how to change it. The method I have to use is UNIF-HOC.
You can accomplish what you want if you use the "Distillation Synthesis" item in the Aspen simulation environment rather than the ternary diagram or residue plot item in the Aspen Properties environment. See the attached screenshot. You will have to add the residue curves manually here (with a click of the button) rather than having them appear in a bunch in the Aspen Properties environment.