ABSTRACT
This chapter presents results obtained for binary hydrocarbon solutions, using the general equation of state and Van der Waals mixing rules. It provides a Lab VIEW program, which allows VLE prediction calculation, for binary systems at high pressures and a new high-pressure VLE calculation program written using Lab-VIEW. The non-ideal behavior of liquid solutions influences all other properties and is important in vapor-liquid equilibrium calculations. The dependence of the activity coefficient on temperature and compositions is found to be significant when the hydrocarbons are very different in size. One of the most important separation processes, distillation, is the result of vapor-liquid equilibrium, VLE. The general equilibrium condition is given—for a multicomponent system with NC components—by the equality of the chemical potential of each component in the phases that are in equilibrium.
