Prediction of Vapour Liquid Equilibria VLE Data

SigniRcant advances in the interpretation and prediction of vapour-liquid equilibria (VLE) data have been made since the 1970s. These advances developed from the publication of a range of equations of state (EOS) based upon the application of traditional ther-modynamic principles and relationships. The EOSs provide interpretation or evaluation of available experimental VLE data. The Wilson model (1964) is probably the most popular for dealing with liquidphase activity coefRcients because it has only two adjustable parameters, and it works well for both binary and multicomponent systems. The prediction of nonidealities in binary mixtures using the UNIQUAC model (1975) is rather more complex. Subsequent and related studies led to the development and use of the Group Contribution Methods such as ASOG and UNIFAC for the prediction of VLE data. The latter is widely used when actual system data are not available, provided that an approximate nonideality correction is acceptable. New methods are being developed and probably the one showing most promise and of general applicability is known as: A Generalized Approach to Phase Equilibria (AGAPE, 1995).

There are many EOS models described in the literature but only a few have wide use for engineering

Solar Panel Basics

Solar Panel Basics

Global warming is a huge problem which will significantly affect every country in the world. Many people all over the world are trying to do whatever they can to help combat the effects of global warming. One of the ways that people can fight global warming is to reduce their dependence on non-renewable energy sources like oil and petroleum based products.

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