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How to Model Liquid-Gas-Liquid interface via membrane ?

Asalia Environmental Engineering

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Hello!

I am trying to model liquid-liquid membrane contactor for ammonia removal using absorbent. However, I have difficulties in modeling the membrane part!

So I will have diluted ammonia concentration in the inlet, while on the other inlet source I will inject H2SO4 (sulfuric acid), however these 2 will be separated by a membrane. In which the membrane acts only as a barrier, so only diffusion and convection happens.

Since only the gas phase of ammonia can pass through the membrane, I have to change the phase from liquid to gas? and after that I have to convert it back to ammonium (NH4+) to react (yes there will be reaction physics too) with sulfuric acid (H2SO4) producing amonium sulfate (NH4)2SO4

I am confused with how to model these interface (as I have to change liquid phase to gas--and apply gas phase only in membrane--- and change gas that pass through to liquid again), as I tried to find papers regarding this, but nothing is similar!

So any of you have any idea on what kind of physics/boundaries I should apply? I will appreciate anything !!

Thank you!!

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-Lia

0 Replies Last Post 2020年3月26日 GMT-4 07:13
COMSOL Moderator

Hello Asalia

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