Methane

References

Equation of State

U. Setzmann and W. Wagner. A New Equation of State and Tables of Thermodynamic Properties for Methane Covering the Range from the Melting Line to 625 K at Pressures up to 1000 MPa. J. Phys. Chem. Ref. Data, 20(6):1061–1151, 1991. doi:10.1063/1.555898.

Thermal Conductivity

Daniel G. Friend, James F. Ely, and Hepburn Ingham. Thermophysical Properties of Methane. J. Phys. Chem. Ref. Data, 1989. doi:10.1063/1.555828.

Viscosity

Sergio E. Quiñones-Cisneros and Ulrich K. Deiters. Generalization of the Friction Theory for Viscosity Modeling. J. Phys. Chem. B, 110:12820–12834, 2006. doi:10.1021/jp0618577.

Melting Line

Evan H. Abramson. Melting curves of argon and methane. High Pressure Research, 31(4):549–554, 2011. doi:10.1080/08957959.2011.629617.

Surface Tension

A. Mulero, I. Cachadiña, and M. I. Parra. Recommended Correlations for the Surface Tension of Common Fluids. J. Phys. Chem. Ref. Data, 41(4):043105–1:13, 2012. doi:10.1063/1.4768782.

Aliases

CH4, methane, METHANE, R50

Fluid Information

Parameter, Value  
General  
Molar mass [kg/mol] 0.0160428
CAS number 74-82-8
ASHRAE class A3
Formula \(CH_{4}\)
Acentric factor 0.01142
InChI InChI=1/CH4/h1H4
InChIKey VNWKTOKETHGBQD-UHFFFAOYAM
SMILES C
ChemSpider ID 291
2D image http://www.chemspider.com/ImagesHandler.ashx?id=291
Limits  
Maximum temperature [K] 625.0
Maximum pressure [Pa] 1000000000.0
Triple point  
Triple point temperature [K] 90.6941
Triple point pressure [Pa] 11696.064115
Critical point  
Critical point temperature [K] 190.564
Critical point density [kg/m3] 162.660002678
Critical point density [mol/m3] 10139.128
Critical point pressure [Pa] 4599200.0
   

REFPROP Validation Data

Note

This figure compares the results generated from CoolProp and those generated from REFPROP. They are all results obtained in the form \(Y(T,\rho)\), where \(Y\) is the parameter of interest and which for all EOS is a direct evaluation of the EOS

You can download the script that generated the following figure here: (link to script), right-click the link and then save as... or the equivalent in your browser. You can also download this figure as a PDF.

../../_images/Methane.png

Consistency Plots

The following figure shows all the flash routines that are available for this fluid. A red + is a failure of the flash routine, a black dot is a success. Hopefully you will only see black dots. The red curve is the maximum temperature curve, and the blue curve is the melting line if one is available for the fluid.

In this figure, we start off with a state point given by T,P and then we calculate each of the other possible output pairs in turn, and then try to re-calculate T,P from the new input pair. If we don’t arrive back at the original T,P values, there is a problem in the flash routine in CoolProp. For more information on how these figures were generated, see CoolProp.Plots.ConsistencyPlots

Note

You can download the script that generated the following figure here: (link to script), right-click the link and then save as... or the equivalent in your browser. You can also download this figure as a PDF.

../../_images/Methane1.png