SAFT Group-Contribution Approaches

In group-contribution (GC) methods the properties of the system of interest (a pure compound or a mixture) are described in terms of the functional groups 

SAFT-VR with kij = predicted an erroneous type of phase behaviour. Reprinted with permission of Fluid Phase Equilibria. 

The GC concept is not new it has been widely implemented for example in the calculation of pure component properties (an overview is provided in ref 474), for the estimation of activity coefficients of liquids in the successful UNIFAC approach, and more recently, in equations of state. The 

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