3 replies to this topic

[MUKhan]

Hey everyone,

 

As part of my senior thesis, I am facing difficulty in sizing a reboiled absorber for my design project. I happen to know the feed temperature and pressure and know the inlet compositions as well. I also understand that a reboiled absorber is a distillation column without a condenser and only a partial reboiler.

 

I would like to know how to exactly approach manual calculations for a reboiled absorber in regards to minimum number of stages, the feed stage, the reboiler as well as top stage pressure. What parameters should be known and how to calculate the other parameters? I do happen to have an estimate regarding the isomerate composition (the bottoms from the reboiler).

 

Any help will be greatly appreciated.

[Art Montemayor]

Have you done any research or work effort in finding out what the topic is, how it works, where, when, and how it is applied?  You should do your basic engineering search requirement first - at least look in Google and other search engines.

 

I believe Dr. John J. McKetta (late head of the Chemical Engineering Dept. at the University of Texas)  in his book, “Encyclopedia of Chemical Processing and Design”, Volume 1, discusses the topic of reboiled absorption and gives a detailed example calculation:

https://books.google... design&f=false

[MUKhan]

Thank you for the feedback Mr. Montemayor.   I already know about the resource you linked, and did Google and searched libraries for this before posting on the forum. The method Dr. McKetta described is a rigorous distillation method of calculation with a tray-by-tray analysis and already had the pressure of the column defined. I was hoping to know if there is any way to find the exact reboiler/top-stage pressure, which Dr. McKetta hasn't described.

[Napo]

MUKhan,

You can review the book "Absorption and Stripping" by P. Chattopadhyay if you are in India.

Napo.