Can I use PHREEQC to create a Temperature-Pressure Phase diagram for CO2?

[Jeonghwan Hwang]

Hello, I am Jeonghwan, Hwang.

I'm trying to make a Temperature-Pressure Phase diagram for CO2.

My question is, can I make the following picture using PHREEQC?

In this figure, there are Temperature on the X-axis and Pressure on the Y-axis.

If possible, is there an example I can refer to?

Thank you

Sincerely,

Jeonghwan Hwang

[dlparkhurst]

I'm not sure what the diagram is showing. PHREEQC can calculate solubility of gases as a function of temperature and pressure, and it can calculate equilibrium between water and a Peng-Robinson gas phase, provided the P-R parameters are available for all of the gas components.

You should probably do a few calculations with PHREEQC to see if you can produce some of the points on the figure. If PHREEQC can calculate some of the points, then you can work on how to fill in the entire diagram. You may need to write a script and then post-process the results.  Again, if PHREEQC can do the calculations, you may be able to use PhreePlot, which has all of the PHREEQC capabilities, to make a diagram.