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[adw07]

Hi all,

I'm trying to create a model for flash gas production upon depressurisation of a vessel containing oil and gas, for example if a leak occured.

I need to find VLE data, in particular the K-values over a wide range of temperatures and pressures. Obviously some of the components such as methane and nitrogen etc. are above their critical temperatures, and so normal Antoine coefficients to find the vapour pressures can't be used (with any accuracy).

Can anyone suggest how I should obtain VLE data for this system?

The method needs to be simple enough to apply using microsoft excel, so presumably this would rule out using equations of state as inputting all of the binary activity coefficients would be too complicated.

Is there any simpler way to do this? (doesn't have to be perfect, just reasonably accurate), possibly some experimentally determined K-value correlations for this system or similar? Thanks for any help