HOCV — Hayden-O'Connell equation of state

The Hayden-O'Connell (HOCV) equation of state is a vapor-only equilibrium method similar to the Ideal and Redlick-Kwong (RK) methods. It is designed to handle systems in which the components dimerize in the vapor phase, such as carboxylic acids.

You cannot select this method as a System method for your Fluid Types. You can use it only in conjunction with the LACT methods. That is, when you select one of the LACT methods in the System list, you can select it in the Vapor Phase Equilibrium Method list.