3 replies to this topic

[golfdude72]

Hello all,

 

I saw that there was a previous topic about C-factor in a Vacuum column (the measure of lift using densities).

I have developed a new method that accurately predicts the average molecular weight. In turn this lowers the C-Factor compared to the previous method. 

 

My question was in regards to economic impact. What exactly does this do as far as operation of the column? Any further explanation will help.

 

Thanks

[PingPong]

Note that MW not only has impact on C but also on molar V and L flows inside the column, and consequently on the equilibria, so it already has an impact when doing the column simulation.

 

There are many correlationsaround to "predict" the MW of heavy petroleum fractions.

 

They all give different results, and now you are going to add one more?

 

Why do you think yours is better than all those others?

[golfdude72]

I am using boiling point lab data for each cut to predict a molecular weight and average these out, right now a constant molecular weight is assumed. This makes the molecular weight be more responsive. I was just looking for a cost benefit of operating at this value compared to a higher c-factor value.

[PingPong]

It is completely unclear what you are doing.

 

MW of petroleum fractions in normally calculated from its boiling point and its specific gravity. Nobody uses a constant MW.