IsoButene

References

Equation of State

Eric W. Lemmon and E. Christian Ihmels. Thermodynamic properties of the butenes Part II. Short fundamental equations of state. Fluid Phase Equilib., 228-229:173–187, 2005. doi:10.1016/j.fluid.2004.09.004.

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

Isobutene, ISOBUTENE, IBUTENE

Fluid Information

Parameter, Value

General

Molar mass [kg/mol]

0.05610631999999999

CAS number

115-11-7

ASHRAE class

UNKNOWN

Formula

\(C_{4}H_{8}\)

Acentric factor

0.1925934521621

InChI

InChI=1S/C4H8/c1-4(2)3/h1H2,2-3H3

InChIKey

VQTUBCCKSQIDNK-UHFFFAOYSA-N

SMILES

CC(=C)C

ChemSpider ID

7957

2D image

http://www.chemspider.com/ImagesHandler.ashx?id=7957

Limits

Maximum temperature [K]

550.0

Maximum pressure [Pa]

50000000.0

Triple point

Triple point temperature [K]

132.4

Triple point pressure [Pa]

0.6761899977345366

Critical point

Critical point temperature [K]

418.09

Critical point density [kg/m3]

233.96335439999996

Critical point density [mol/m3]

4170.0

Critical point pressure [Pa]

4009800.0

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/IsoButene.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/IsoButene1.png