3 replies to this topic

[Wei]

Designing a Gas Absorption Column for Ammonia

This case, the ammonia is being mixed with Air before being fed into the column. The absorbent is water that is flowing from the top.

What would happen if instead the ammonia is mixed with pure oxygen, or pure hydrogen?

Would the diffusivity affect how much ammonia is actually being removed by the water? how would we approach this problem?

[siretb]

What will count is the binary diffusivity NH3 in O2, or H2 or whatever.
There is a direct impact on the gas side mass transfer coefficient. (the kg.a).
The kg.a is more or less proportional to the square root of the diffusivity. See ONDA's correlation for more details.
In practice, this effect is limited

[Qalander (Chem)]

Dear siretb Hello/ Good Morning,
Nice and heartening to see you around and helping.
Best Regards
Qalander

[Wei]

Alright, I will look into kg,a and how it is related to the mass transfer of NH3 into O2

Thank you for the help