A simple cubic equation of state of the van der Waals type is developed for simultaneous representation of vapor-liquid equilibrium and saturated liquid and vapor volumes for polar fluids and fluid mixtures. The new equation consists of three parameters and only the parameter > lda" is made temperature dependent. A new and generalized expression is developed for the temperature dependence of the parameter. The new equation yields good representation for pure components. For mixtures the new equation is as capable for VLE calculations as the Soave-Redlich-Kwong, the Peng-Robinson and the Patel-Teja equations, but it yields lower deviations in the predicted saturated liquid volumes.
All Science Journal Classification (ASJC) codes
- Chemical Engineering(all)
- Physics and Astronomy(all)
- Physical and Theoretical Chemistry