3 replies to this topic

[Swetha Mohan]

I have feed properties which ranges from IBP:150 to FBP 250. We want to distill this as C9 & C10. I dont have any simulation software like PRO II/ HYSYS. I want to design the column for this feed, number of trays in the column. The throughput will be 6000 MT/month. Request to guide me with the steps how to design the size of column and number of trays required for the C9 & C10 distillation without any simulation software.

[PingPong]

I have feed properties which ranges from IBP:150 to FBP 250.

Are that IBP and FBP from ASTM D86 in Celsius?

If all you have is an IBP and FBP you cannot posibly know how much C9 and C10 is present, or C8 and lighter, or C11 and heavier. Moreover there will be many different C9 and C10 isomers (alkanes, naphtenes and aromatics) present.

 

We want to distill this as C9 & C10

What does that mean? Do you want to produce a C9 plus C10 mixture separate from the rest? Or do you want to produce a separate C9 fraction as well as a separate C10 fraction? Again: there will be many different C9 and C10 isomers (alkanes, naphtenes and aromatics) present.

 

What is the purpose of your exercise? Is this for a school project, or for real?

[Swetha Mohan]

1. "Are that IBP and FBP from ASTM D86 in Celsius?"  --- Yes, it is in Celsius

 

2. "What does that mean? Do you want to produce a C9 plus C10 mixture separate from the rest? Or do you want to produce a separate C9 fraction as well as a separate C10 fraction? Again: there will be many different C9 and C10 isomers (alkanes, naphtenes and aromatics) present."

 

Yes, We want to separate C9 fraction and C10 fraction separately. As you told there are different isomers, we are targeting for Aromatics (99.9 % v/v - ASTM D 1319) . The demand for C9 and C10 in the market is high. 

[PingPong]

You want to design something, but you do not have a feed composition. You need to have a detailed composition of all molecules present.

 

Normally aromatics are recovered from Reformate (produced by a catalytic reformer). What is the source of your feedstock?

 

A normal aromatics complex produces primarily benzene and paraxylene. C9 + C10 aromatics are recycled within the complex to convert them into benzene and xylene by transalkylation. Apparently that is more economical than producing them separately as specialty solvents (or whatever).

 

What is the purpose of your exercise? Is this for a school project, or for real?