5 replies to this topic

[tahereh.jafary]

Hi
Could any body help me in designing a distillation column to separate diesel and kerosen by distillation? I have to do sizing regarding to height and diameter of the column. Hysys doesnt have these two component and I couldnt find any equilibrium data for this mixture......
please advise me if you have any suggestions.....

[sheiko]

Hi,

Diesel and Kerosene (among others) are usually separated in a process unit called "Crude Distillation" located in a petroleum refinery.

I suggest you to read and study the following online material:
http://www.iitg.erne...es_for IITG.pdf

Edited by sheiko, 03 January 2013 - 08:39 AM.

[S.AHMAD]

Sheiko
Good info. Thank you
Jafary
You can define the feedstock the same way as you defined crude oil that you need to know the density and ASTM86/TBP

[tahereh.jafary]

Sheiko
Good info. Thank you
Jafary
You can define the feedstock the same way as you defined crude oil that you need to know the density and ASTM86/TBP

Thanks for your reply, would you give me some information in details? Actually I tried to use the equation of a=p sat Kerosene/p sat Diesel, to het the volatility and use Mac-cab Thiele method, but still I am not sure about real saturated vapor pressure. I found different amounts in different references, it is normal due to quality of these cuts in different places. but I need a background of approximate ones, Now I gonna assume an amount between 2-4 for volatility constant and draw equilibrium curve with this assumption? could it be right? Is there any simple method for rough calculation of diameter and height of the column? is it true if I assume 90% purity of Kerosene on top and 85% recovery of Kerosene? I already tried to calculate No of stages graphically with a=2, but No of stages will be more than 20, a tad weird(with assumption of 95% purity on top and recovery of 90%). I got confused, would you help me more. I just have feed stock flow and composition, Other information should be assumed by myself for a real situation.

[tahereh.jafary]

Hi,

Diesel and Kerosene (among others) are usually separated in a process unit called "Crude Distillation" located in a petroleum refinery.

I suggest you to read and study the following online material:
http://www.iitg.erne...es_for IITG.pdf

Hi
Thanks for your guide, would you help me in details. I know the concepts of cruid distillation but it is different.First I tried to search data for binary mixture of Kerosene and diesel, Now I think I have to consider the mixture as a multicomponent feed and start multicomponent distillation. I need detailed help to start. Plz let me know if you have any practical suggestions.

[tahereh.jafary]

Thanks for your reply, would you give me some information in details? Actually I tried to use the equation of a=p sat Kerosene/p sat Diesel, to assume volatility constant and use Mac-cab Thiele method, but still I am not sure about real saturated vapor pressure. I found different amounts in different references, it is normal due to quality of these cuts in different places. but I need a background of approximate ones, Now I gonna assume an amount between 2-4 for volatility constant and draw equilibrium curve with this assumption? could it be right? Is there any simple method for rough calculation of diameter and height of the column? is it true if I assume 90% purity of Kerosene on top and 85% recovery of Kerosene? I already tried to calculate No of stages graphically with a=2, but No of stages will be more than 20, a tad weird(with assumption of 95% purity on top and recovery of 90%). I got confused, would you help me more. I just have feed stock flow and composition, Other information should be assumed by myself for a real situation.