5 replies to this topic

[pablo285]

Hello guys,

I need to find out density of a straight run atmospheric heavy gasoil stream at ~340°C
I know the density of that stream at 20°C is 890 kg/m3 so I'm looking for a correlation that would help me calculate the density at 340°C.
I tried it in a simulation software and the result was something around 660 kg/m3 but it seems too low even for that temperature.
Can anyone help?

Thanks in advance.

[MrShorty]

Let me ask this: why does that seem too low? I note that 660/890 is about 74%. When I compare that to 1-methylnaphthalene and triethylene glycol (using DIPPR's correlation), I get about the same ratio (.74/1.02=72%, .84/1.12=75%). I know I'm comparing to pure compounds rather than mixtures, but it doesn't seem to me to be an unreasonable result.

[smalawi]

Hi,

you can check the API technical databook, it has a correlation for gravity / temperature, keep in mind it has temperature limits.

which software / basic data did you use to generate your estimate ? Did you check if the stream is single phase at the new temperature / pressure ?

If you have good distillation data / gravity data and using an established flowsheeter (Hysys, ProII,...) then I see no reason to worry,

cheers,

sm

[JMW]

You might care to try the attached spreadsheet, it is based on the Manual of Petroleum Measurement standards calculations and has been independently tested and is used by some Bunker Surveyors when checking bunker fuel oil deliveries.
BUT:
your conditions are way out their in extrapolation land rather than within the interpolation limits in the standards. You need to be careful in your choice of commodity group.
As a first approximation, using "Auto" I get around 651kg/m3 as a fuel oil.  Density_12Mb.xls   509.5KB   28 downloads

Attached Files

•  Density_12Mb.xls   509KB   54 downloads

[suhas]

Dear
You can use density correction factors given in API chapter 11.1

Regards
Suhas

[ankur2061]

Dear All,

This is not related directly to HGO density but there is a excel calculator avaiable for pure hydrocarbon liquid densities (non-polar hydrocarbon liquids) at:

http://www.cheresour...h__1#entry28987

I would like to have comments from the forum members regarding this.

Regards,
Ankur