Critical Pressure & Temperature of Common Petroleum Fuels

[Ramasami]

Will appreciate if members could share the Critical Pressure & Temperature of Common Petroleum Fuels e.g. Gasoline or Petrol, Diesel, Fuel Oil etc. Thank you.

[sukanta60]

you can check it in your simulator.

[panos]

Dear Ramasami,

As an approximate range for crude oil atmospheric distillation petroleum fractions (not finished products as you mention) just to give you some values for having a feeling on the order of magnitude Pcr and Tcr can take, please consider 1) for naphtha Pcr = 34.5 bara, 2) for Kero Pcr = 23.2 bara, 3) for LGO (Light Gasoil) Pcr = 18.8 bara, 4) for HGO (Heavy Gasoil) Pcr = 16.3 bara, 5) for HHGO (Heavy-Heavy Gasoil) Pcr = 13.5 bara and 6) for Atmospheric Column Bottom Residue Pcr = 9.1 bara.

Calculated values for Pcr and Tcr for fuels using a simulator or the API book may look as follows :

[link Point to another website Only the registered members can access]

So, just to have an idea, looking into this table and the corresponding Pcr -Tcr you can find that the Pcr decreases from the naphtha to the heavy fractions while the Tcr increases. So we have roughly that 1) for naphtha Pcr = 34.5 bara the Tcr=236 DegC, 2) for Kero Pcr = 23.2 bara the Tcr=356 DegC, 3) for LGO (Light Gasoil) Pcr = 18.8 bara the Tcr=430 DegC, 4) for HGO (Heavy Gasoil) Pcr = 16.3 bara the Tcr=470 DegC, 5) for HHGO (Heavy-Heavy Gasoil) Pcr = 13.5 bara the Tcr=550 DegC and 6) for Atmospheric Column Bottom Residue Pcr = 9.1 bara the Tcr=630 DegC.

Please note that this is just an example to see the variation of typical Pcr and Tcr values and not standard in every case. So you must try to find your way by using the exact data you have for your case.
I hope that what I showed here can be of some help for you to clarify the Pcr and Tcr for hydrocarbon fractions. These are not very good for the final fuels, as you required, but for approximate calculations you may assume them as acceptable for the moment.
Best regards
Panos