Methane / n-decane high-pressure separator (SAFT-VR Mie)

A 60/40 methane / n-decane well fluid at 60 bar and 320 K through one high-pressure separator, on SAFT-VR Mie (Lafitte et al. 2013): the full Mie-segment perturbation theory — a1/a2/a3 monomer terms plus the TPT1 chain — with cited pure-component parameters and no binary correction. What it computes: 49 mol/s of gas at 99.9% methane and 51 mol/s of oil holding 22 mol% dissolved methane, the K-values 3.9 for methane and 0.001 for decane. Two components and one flash on purpose: this package costs 7.5 s per flash here and 40 s per flash with four components, so a separator train on it does not belong on a gallery card (one was killed after 15 minutes). Non-associating fluids only — no water, no alcohols — which is the package's own stated scope.