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Critical volume prediction methods for hydrocarbons

asked Jan 8, 2016 in Process by jensi129 (500 points)
Critical volume prediction methods to estimate the interaction parameters (kii) needed for calculation of mixture pseudocritical properties.

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answered Jan 8, 2016 by odadmin (21,030 points)

Riazi-Daubert Methods:

Follwing simplified formula can be used to calculate critical volume of hydrocarbons:

For range C5-C20:

Vc = 1.7842 x 10–4 T2.3829 SG–1.683

For C20 and heavier:

Vc = 6.2 x 1010 x [ exp (-7.58 x 10-3 Tb - 28.5524 x SG + 1.172 x 10-2 Tb SG)] Tb1.20493 SG17.2074 (Use for

where Vc is in cma/mol and Tb is in kelvin.

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