Typical Diesel Info

[MatthewD]

I need to know a typical reid vapour pressure for diesel, I fear that such a number doesnt exist from a quick literature search

 

[mbeychok]

Matthew D:

Table 7.1-2 in Chapter 7 of the U.S. EPA publication "AP 42, Compilation of Air Pollution Emission Factors" has these values for the vapor pressure (in psia) of diesel oil:

40 deg F = 0.0031
50 deg F = 0.0045
60 deg F = 0.0074
70 deg F = 0.0090
80 deg F = 0.012
90 deg F = 0.016
100 deg F = 0.022

That table has values for gasolines (of various Reid Vapor Pressures), crude oil, jet fuel, kerosene, diesel (#2 fuel oil) and Heavy Fuel Oil (#6 fuel oil).

Figures 7.1-13b, 7.1-14b, 7.1-15 and 7.1-16 provide equations for calculating the vapor pressure of crude oil and petroleum products if you have the requisite physical properties for your particular crude oil or product.

AP-42 is available online at

http://www.epa.gov/ttn/chief/ap42/index.html

Milton Beychok
(Contact me at www.air-dispersion.com)

 

[MatthewD]

Wow those are alot smaller then I would have thought.

 

[EGT01]

MatthewD,

Not long ago I was searching for info on diesel and came across this reference comparing biodiesel to commercial no. 1 and 2 diesel fuel.

http://www.me.iastate.edu/biodiesel/Technical Papers/ASAE Paper No. 026084.pdf

If you have a process simulator that is capable, you can enter the ASTM D86 distillation info from the above and get it to predict the Reid vapor pressure. I had this setup in Aspen and the predicted vapor pressure at 100F was 0.028 psi which is essentially what the EPA data shows. Aspen also reported a Reid vapor pressure of about 0.3 psi at 100F.

Here's another link I thought was interesting but really didn't have the info I was looking for at the time.

http://www.tdiclub.com/articles/Diesel_Fuel_Guidlines/