Jump to content



Featured Articles

Check out the latest featured articles.

File Library

Check out the latest downloads available in the File Library.

New Article

Product Viscosity vs. Shear

Featured File

Vertical Tank Selection

New Blog Entry

Low Flow in Pipes- posted in Ankur's blog

0

Saturated Vapor Stream From Column


2 replies to this topic
Share this topic:
| More

#1 Lavi

Lavi

    Junior Member

  • Members
  • 23 posts

Posted 18 February 2018 - 03:41 PM

Though I am not a student, I have to ask the question here because I have a very basic doubt. 

 

Is it possible to generate a vapor/gas stream which is 'not saturated' from top of a distillation/ regeneration column? I tried to simulate a situation wherein overhead gas from a column is not saturated but could only get saturated vapor from the top. 



#2 Saml

Saml

    Gold Member

  • Members
  • 301 posts

Posted 18 February 2018 - 09:04 PM

The basic assumption in the simulation is that every stage is in equilibrium. So the last stage will produce liquid that is at its bubble point and a gas that is at its dew point.

 

The actual behaviour may be either side of the saturation line. If mass transfer governs the gas may come out unsaturated. If you have carry over, it may come out with some liquid. But if you use equilibrium states in the simulation you will always come out with saturated gas.

 

At least to ways of simulating non equilibrium are:

- Using Murphree's efficiency

- Using a mass transfer model (in Aspen it would be RateFrac)



#3 Lavi

Lavi

    Junior Member

  • Members
  • 23 posts

Posted 19 February 2018 - 02:50 AM

Thanks. That was helpful.




Similar Topics