Gas treatment

[codie]

Hi, I have to my opinion a rather general question but of which I find contradictory information and I hope someone here can explain me some more background of it.
I'm dealing with an application where gas is saturated with moist. The moist has to be removed from the gas physically.
We are thinking about doing this in a sequence of 1) physical gas scrubbing; 2) cooling; 3)droplets removal by means of a metal tampon.

The question on this is; in order to get the best efficiency; do we have to do the gas scrubbing first and then cool the gas or just the other way around?
Or is there just more to it? (gas dependancy

 

[bobster2003]

It is dependent on how much water you need to remove from the gas.

If you only need to remove liquid droplets (free liquid) then just us a separator with demister pad (wiremesh type).

If you wish to dehydrate the gas to a specific dewpoint then a number of options are open to you. There is cooling, physical adsorption (e.g. silica gel) or absorption (using glycol or methanol).

If you do cool the gas, then the liquids droplets will have to be removed by using a demsiting device. Also, if cooling is used be careful that gas hydrates will not form.