IsoButane

References

Equation of State

D. Buecker and W. Wagner. Reference Equations of State for the Thermodynamic Properties of Fluid Phase n-Butane and Isobutane. J. Phys. Chem. Ref. Data, 35(2):929–1019, 2006. doi:10.1063/1.1901687.

Thermal Conductivity

R.A. Perkins. Measurement and Correlation of the Thermal Conductivity of Isobutane from 114 K to 600 K at Pressures to 70 MPa. J. Chem. Eng. Data, 47(5):1272–1279, 2002. doi:10.1021/je010121u.

Viscosity

E. Vogel, C. Kuechenmeister, and E. Bich. Viscosity Correlation for Isobutane over Wide Ranges of the Fluid Region. Int. J. Thermophys, 21(2):343–356, 2000. doi:10.1023/A:1006623310780.

Melting Line

D. Buecker and W. Wagner. Reference Equations of State for the Thermodynamic Properties of Fluid Phase n-Butane and Isobutane. J. Phys. Chem. Ref. Data, 35(2):929–1019, 2006. doi:10.1063/1.1901687.

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

isobutane, Isobutane, ISOBUTANE, R600A, R600a, ISOBUTAN

Fluid Information

Parameter, Value  
General  
Molar mass [kg/mol] 0.0581222
CAS number 75-28-5
ASHRAE class UNKNOWN
Formula \(C_{4}H_{10}\)
Acentric factor 0.183531783208
InChI InChI=1/C4H10/c1-4(2)3/h4H,1-3H3
InChIKey NNPPMTNAJDCUHE-UHFFFAOYAY
SMILES CC(C)C
ChemSpider ID 6120
2D image http://www.chemspider.com/ImagesHandler.ashx?id=6120
Limits  
Maximum temperature [K] 575.0
Maximum pressure [Pa] 35000000.0
Triple point  
Triple point temperature [K] 113.73
Triple point pressure [Pa] 0.0228908390119
Critical point  
Critical point temperature [K] 407.817
Critical point density [kg/m3] 225.5
Critical point density [mol/m3] 3879.75678828
Critical point pressure [Pa] 3629000.0
Reducing point  
Reducing point temperature [K] 407.81
Reducing point density [mol/m3] 3879.75678828
   

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/IsoButane.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/IsoButane1.png