D6

References

Equation of State

P. Colonna, N.R. Nannan, and A. Guardone. Multiparameter equations of state for siloxanes: [(CH3)3-Si-O1/2]2-[O-Si-(CH3)2]i=1,...,3, and [O-Si-(CH3)2]6. Fluid Phase Equilib., 263:115–130, 2008. doi:10.1016/j.fluid.2007.10.001.

Surface Tension

A. Mulero and I. Cachadiña. Recommended Correlations for the Surface Tension of Several Fluids Included in the REFPROP Program. J. Phys. Chem. Ref. Data, 43:023104–1:8, 2014. doi:10.1063/1.4878755.

Aliases

Dodecamethylcyclohexasiloxane, DODECAMETHYLCYCLOHEXASILOXANE

Fluid Information

Parameter, Value  
General  
Molar mass [kg/mol] 0.444924
CAS number 540-97-6
ASHRAE class UNKNOWN
Formula \(C_{12}H_{36}O_{6}Si_{6}\)
Acentric factor 0.736
InChI InChI=1/C12H36O6Si6/c1-19(2)13-20(3,4)15-22(7,8)17-24(11,12)18-23(9,10)16-21(5,6)14-19/h1-12H3
InChIKey IUMSDRXLFWAGNT-UHFFFAOYAY
SMILES C[Si]1(O[Si](O[Si](O[Si](O[Si](O[Si](O1)(C)C)(C)C)(C)C)(C)C)(C)C)C
ChemSpider ID 10449
2D image http://www.chemspider.com/ImagesHandler.ashx?id=10449
Limits  
Maximum temperature [K] 673.0
Maximum pressure [Pa] 30000000.0
Triple point  
Triple point temperature [K] 270.2
Triple point pressure [Pa] 0.159752998824
Critical point  
Critical point temperature [K] 645.78
Critical point density [kg/m3] 279.095729841
Critical point density [mol/m3] 627.2885478
Critical point pressure [Pa] 961000.0
   

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/D6.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/D61.png