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Home > Forums > Petroleum Engineers > Activities > Petroleum refining engineering Forum

Distillation Blending

Read More Threads Like This One

LuckyG12 (Petroleum)

19 Apr 12 5:38

Hi all,

I have been searching in vain for the past few months for a way to predict the final distillation curve of two blend petroleum products.

Is there a computer programme or known equation which could help me predict what the curve will look like from two components?

Any help on this one would be greatly appreciated.

Cheers

rutherford703 (Chemical)

27 Apr 12 10:24

I believe PRO II can predict the distillation curve for two blending petroleum products. Maybe Hysis can do it too.

thecaptin (Chemical)

14 May 12 10:32

what about of any equation to calculate the blend of gasoline?

poli60 (Chemical)

14 May 12 11:32

Just for quick estimate you can linearly blend the single component distillates at the same temperatures: for example
- 2 components (A,B);
- blend composition, mass (or volume) fractions: xA, xB (xA+xB=1);
- distillation points, mass (or volume) fractions: D1A, D2A.....DnA and D1B, D2B,....,DnB (at T=T1, T2,...., Tn °C).
Results: DiBLEND = xA*DiA + (1-xA)*DiB (for i=1...n)
This approach were used in old blending/linear programming tools, not yet linked to simulators. Results are not very bad... only when the temperature ranges of the components are not very different.

The alternative (rigorous) approach consists in putting the two (or more) component distillation curves and mix them in a Process Simulator (HYSYS, UNISIM, PROII, WINSIM.....)

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