Figures provided in all three categories are subject to the terms of CC BY-ND 4.0.  In essence you may use, without modifications, provided you reference SCFCan and this website.

Phase Diagrams - Carbon Dioxide

Phase Diagrams (P-T, P-h, P-v, T-𝜌, T-s) are provided for Carbon Dioxide.  You may open each figure in a new tab (browser dependent) or download a high resolution TIFF file.

  • Pressure - Temperature phase diagram
  • P-T
  • Pressure Range: 0 to 20 MPa
  • Temperature Range: 180 to 360 K
  • Pressure - Enthalpy phase diagram
  • P-h
  • Pressure Range: 0 to 40 MPa
  • Enthalpy Range: -400 to 50 kJ/kg 
  • Pressure - Specific Volume phase diagram
  • P-v
  • Pressure Range: 0 to 20 MPa
  • Specific Volume Range: 0 to 0.02 m3/kg 
  • Temperature - Density phase diagram
  • T-ρ
  • Temperature Range: 230 to 400 K
  • Density Range: 0 to 1400 kg/m3
  • Temperature - Entropy phase diagram
  • T-s
  • Temperature Range: 230 to 400 K
  • Entropy Range: -3.5 to 0 kJ/kgK

Thermodynamic Cycles - Carbon Dioxide

An annotated thermodynamic cycle is shown here on the P-h phase diagram as an example.

  • Pressure - Enthalpy Thermodynamic Cycle
  • P-h
  • Pressure Range:
  • 0 to 40 MPa
  • Enthalpy Range:
  • -400 to 50 kJ/kg

Solubility Graphs - Carbon Dioxide

A binary system and a ternary system are provided as examples

  • Naphthalene Solubility in
  • CO2
  • Solubility Range:
  • 0 to 0.14 mol/mol
  • Pressure Range:
  • 0 to 30 MPa
  • Temperature Range:
  • 300 to 360 K
  • Cholesterol Solubility in
  • CO2
  • with Methanol
  • Solubility Range:
  • 0 to 0.0003 mol/mol
  • Pressure Range:
  • 0 to 25 MPa
  • Temperature Range:
  • 310 to 335 K


  1. 1
    What is the source of data used to create these figures?

    Span & Wagner’s Fundamental Equation of State (FEOS) has been used for all figures (Span, R.; Wagner, W. 1996. A new equation of state for carbon dioxide covering the fluid region from the triple-point temperature to 1100 K at pressures up to 800 MPa. Journal of Physical and Chemical Reference Data, 25: 1509–1596).

    Solubility graphs rely on measured solubility data that has been fitted by Chrastil's model (binary systems) and Mendez-Santiago Teja's model (ternary systems with cosolvents).

  2. 2
    How can I get customized figures?

    Customized figures are available upon request.  A small number of different fonts, colours etc. can be readily provided.  More significant modifications are possible – ask and we will see what we can do for you.  Some custom options may be freely provided whereas others may require a negotiated fee.  Contact us through the form below. 

  3. 3
    How should I reference a downloaded figure?

    Under CC BY-ND 4.0, you are required to provide attribution to SCFCan in relation to any of your uses.  You do not have copyright and you may not transfer copyright.  Appropriate attribution is:

    SCFCan Website, Thermodynamic Graphs page, accessed Year Month Day at:

  4. 4
    How were these figures created?

    These figures are created in Matlab©.

  5. 5
    What is the format of the download?

    The downloaded file has a tiff format.

  6. 6
    Are thermodynamic figures for other fluids available?

    Yes.  Query under the custom contact request.

  7. 7
    Are solubility graphs available for other solutes?

    Yes.  We can create from our existing database of solutes or we can create from your solubility data.  Query under the custom contact request.


Need a customized graph? Have inquiries? Have questions?

Fill out the form here with your specific request. Please make sure you provide the following information:

  • Name
  • Email
  • Affiliation
  • Business type (University, Private, Government, Non-Profit, etc.)
  • Figure title
  • Customization request