Volumetric Expansion Coefficient 1

[MaNaTMoS]

Where can I find volumetric expansion coefficients of Jet Fuel (170-250C ASTM D86 distillation, density = 0.80g/cm3) and Diesel Oil (210-355C distillation, density = 0.84 g/cm3)?
The question also goes for (average) specific heat (kJ/kg*C) values of these products.

I have found one value for Jet Fuel: vol. expansion coefficient of 0.00099/C. Is this OK?

 

[BenThayer]

You can approximate this using with Perry's Chemical Engineers' Handbook 5th edition page 3-227 and equation 3-3 if you have density information over a couple of temperatures.

 

[jmw]

You can also download the "Density" excel spreadsheet from this page but note that there is no pressure correction in the calculations:

http://www.viscoanalyser.com/downloads.html

This will let you calculate the density at any temperature.


JMW

http://www.viscoanalyser.com

Eng-Tips: Pro bono publico, by engineers, for engineers.

Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.

 

[25362]

Some comments on the cubic thermal expansion (CTE) of hydrocarbons, upon looking at the data shown in the CRC Handbook of Chemistry and Physics.

1. CTE values of mixtures would depend somewhat on the composition. For example, on % aromatics.

2. Temperature affects CTE. For example, values for toluene at 20 and at 50 deg C are 0.00105/^oC and 0.00113/^oC, respectively. For octane at 25 and 45 deg C, 0.00116/^oC and 0.00123/^oC. respectively.

3. By taking the mid BP and comparing with pure paraffinic hydrocarbons one can appreciate whether the estimated data are in the ballpark. For example, the jet fuel with a MBP of 210^oC would correspond to a C11-C12 mix with 0.00097-0.00093/^oC values at 25 deg C. Aromatics would tend to "adjust" the densities of the paraffinic hydrocarbons upwards.

4. Higher molecular weight paraffinic hydrocarbons would tend to have a bit lower CTE values. For example, at 25 deg C, C12=>C13=>C14 would show: 0.00093=>0.00090=>0.00087/^oC, respectively.

I hope I didn't complicate the picture more than needed.

 

[IRstuff]

jmw,

Your website's navigation buttons appear to only work for me along the bottom and top edges of each button. Has anyone else experienced this?

TTFN

 

[jmw]

Thanks for letting me know IRStuff, I will investigate. It may be the way the hyperlink is added to the button.

JMW

http://www.viscoanalyser.com

Eng-Tips: Pro bono publico, by engineers, for engineers.

Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.

 

[25362]

MaNaTMoS, I found an article in the March 27, 1989 issue of OGJ that provides correlations for the calculation of densities of petroleum fractions as function of their sp. gravity, the Watson correlation factor and the temperature, that may serve your purpose. It is titled Correlations allow calculations of density for petroleum fractions by Jose Vicente Gomez (Maraven S.A.).

The formula for fractions boiling between 40^oC and 480^oC contains 20 constants !

If you can not get hold of this article, I could arrange it to be faxed to you (2 pages) upon receiving a fax number.

 

[MaNaTMoS]

Thank You very much, 25362. I think I will manage to find OGJ in our library.

One star is comming for You, just enough to make Your morning more shiny.

MaNaTMoS