Phase Envelope for Light Hydrocarbons

This page is designed to allow users to select a pure component or a mixture of components and determine either the vapor pressure curve for a pure component or the pressure-temperature phase envelope for a mixture. This page is currently using the Peng-Robinson equation of state to predict the properties of these mixtures. To try it out, create an input mixture using the form below and hit the done button to start the calculations.

Depending on the mixture selected and the load on this server, this calculation can take a few minutes. Please be patient.

Mixture Input

Do you wish to input a guess for a T,P point inside the phase boundary? This should only be necessary if the mole fraction-weighted critical point does not fall within the phase envelope or falls near a phase boundary and the algorithm used to generate points on the phase boundary fails.

yes no

If you checked yes in the box above, please enter the temperature and pressure of a point within the phase envelope of the mixture:

  • Temperature: K
  • Pressure: kPa

Mixture

Select the components for your mixture from the lists below and enter the mole fraction of each component in the field to the right. If the mole fractions do not sum to one when you are done, they will be re-normalized for you.

Component 01: Mole fraction in mixture:
Component 02: Mole fraction in mixture:
Component 03: Mole fraction in mixture:
Component 04: Mole fraction in mixture:
Component 05: Mole fraction in mixture:
Component 06: Mole fraction in mixture:
Component 07: Mole fraction in mixture:
Component 08: Mole fraction in mixture:
Component 09: Mole fraction in mixture:
Component 10: Mole fraction in mixture:


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