Mercury is nonpolar in nature like many other hydrocarbons. Peng Robinson equation can be used to find two phase compositions for mixtures of nonpolar compounds.Can the liquid phase composition of mixtures of hydrocarbons and mercury calculated using Peng Robinson equation give the solubility of mercury in pure hydrocarbons and hydrocarbon mixtures?
Do you mean the solubility of elemental mercury in liquid hydrocarbons?
if yes, yes you can calculate its solubility. It is highly dependent on the vapour pressure of Hg so make sure that you pure component parameters give you good Psat. You can also safely assume for mixtures that the mercury rich phase is pure.
Dear Dr Chapoy,
Is the mercury concentration in liquid phase composition existing in equilibrium with vapour phase of the hydrocarbon mixtures containing elemental mercury calculated using peng robinson equation not the same as solubility of elemental mercury in the hydrocarbon mixture if the units in both cases are same.
Here is an example of flash calculations with the PR EoS of an equimolar methane + ndecane systems at 20C and 50 bar (2 phases) in presence of mercury.
Vapour
Methane 0.999843
n-Decane 1.57E-04
Mercury 5.11E-08
LHC
Methane 0.241661
n-Decane 0.758338
Mercury 1.18E-06
@Antonin Chapoy
After all your measurements are complete, will we be able to correlate the data and calculate a methane-mercury Kij, ethane-mercury Kij, , etc?
Dear Hazem Haddad,
Yes I have now a databank of kij for mercury + HCs, N2, water, glycols....
Best Regards
Antonin
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