3 replies to this topic

[Mauro77]

Dears,

I'm looking for rules of thumbs for sizing a molecular sieves column gas purification (from CO2).

 

In particular, I'm struggling finding a value of the minimal gas velocity for avoiding channeling and assure good gas distribution. This is a key info I need for determining the column diameter.

 

Thank you for any advice!

[Mauro77]

Thank you for your answer, but I'l interested in small industrial scal column , not lab scale. I think in lab scale column, side effects have a large impact on the design of the adsorption.

Edited by Mauro77, 20 April 2018 - 04:45 AM.

[Mauro77]

different suppliers and literature say that gas velocity should be in the range 0.1 m/s -0.2 m/s

[Art Montemayor]

I have always used empirical recommendations by adsorption bed designers and fabricators.  I have applied 0.1-0.15 m/s as the operating velocity and never had a bad operation.  If the bed is properly designed and installed, there should be no perceivable channeling of the gas being adsorbed.  I am referring to the adsorption cycle.  For the bed regeneration, the velocity I employed was higher, around 0.2-0.3 m/s, depending on the regen gas source and pressure drop allowed.