Simple example with activity coefficient model and antoine parameters for saturation pressure? about clapeyron.jl HOT 3 OPEN

Yes!, we use CompositeModels for defining equilibria with different models, maybe something like this?

fluidmodel = CompositeModel(["octane","heptane"],liquid = RackettLiquid,saturation = DIPPR101Sat,gas = BasicIdeal)
#we create a fluid model with rackett liquid volume, ideal gas and DIPPR 101. If you perform equilibria with this, it will be done via raoult. 

model = CompositeModel(["octane","heptane"],liquid = UNIFAC, fluid = fluidmodel)
#this model now uses activities in conjunction with the fluid model

check the CompositeModel docs for the combinations.
Funnily enough, I think we don't have an Antoine saturation method 😅, I can add one and release a new version of you wish.

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@longemen3000 Could they technically just use LeeKesler right away in the Activity coefficient model? And skip building the composite model.

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hmm, I don't remember if we support that (mainly the liquid volumes), but I can do some changes to allow just passing a saturation model, and assume BasicIdeal for gas, and a dummy method for the liquid (NaNLiquid? )

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