Components of a Wetted Wall Column Setup

There is nothing to stop the gas from going down other than a small pressure difference between the bottom and the top that keeps the gas flowing upwards, so there may well be an underflow/overflow weir arrangement at the bottom of the column to form a vapour seal. Such a device lets the liquid out while stopping the gas.

Without a more detailed description of the unit it is difficult to add anything else, apart from, why a wetted wall column when a packed column would do the same general job in a smaller volume (albeit with a greater gas pressure drop to consider)?

"why a wetted wall column"?

Because that's is homework assignment.

why you say? Frankly i couldn't think of anything else that could simulate something that is closely similar to those columns used in industries wherein you can also apply conduction (annular water jacket) to reduce the temperature while keeping the components of the absorbent liquid from volatilizing. Furthermore, i'm thinking that this can be further used to studying the kinetics of the absorption reaction in a simpler way. So far i haven't seen any other papers related to my topic of study that uses packed columns. Probably it's due to the lack of definite or accurate kinetic data.

So that works even for a column height of 3.6 ft? (sorry for not stating the specs)

As for choosing this kind of column above anything else... i stated it on my reply to the next post.

I agree that this sounds like a mangled homework assignment. However as the OP stated that this is a facet of a lecture that puzzles them and the accompanying information seems mangled. I tend to believe the OP that this is not a homework question (lighten up Lyn ).

I suspect that your vacuum pump is at least first used to evacuate the previous gas column to a significantly high degree so that the gas column will be dominated by your added gas. Now depending on the critical Physics and Chemistry that happens in this column you might have a necessity to maintain a certain pressure (particle density) and average directional velocity (up) so that to maintain this flow you must pump down the travelling gas that reaches the top of the gas column. Come to think of it there may also be value in the gas being a known purity at the beginning of it's travel so that at the vacuum pump extraction it will have been exposed to the wet fluid for a known fixed period of time.

I'm sorry if this looks like i had to abuse this forum to do this thesis which appears like a mangled homework. But i find difficulty having to do this since i have to study alone ahead of the lectures stated in the curriculum. Simply put I'm a novice and this is all i can come up with the research me and my thesis mates did ourselves.

I am grateful for hearing your opinions.

Any news from the implementation? I guess you need vacuum so the fluid evaporates below 100°C. Which is necessary in cases you don't have that much sunshine. What is the apparatus behind that evaporating unit?

cheers

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Um sorry i think you misunderstood me there. The fluid should NOT evaporate. That's why i had a water jacket made at the outer side of the column to keep the temperature low. My problem is whether the gas will be able to make it through the column upwards against the downward flow of the fluid. In fact I am wondering myself whether that really happens so i'm here to seek advice from those who already had experience in doing experiments regarding wetted wall columns. However, this is not a case of humidification but the opposite which is absorption.