Gas purification: How to remove water vapor from gas?
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Question: There is a large amount of water vapor in carbon dioxide gas; how can it be removed? The temperature has dropped to 50°C through the heat exchanger, but the vapor content is still very high~~~ What should be done?
First, do you have any specific requirements regarding the operating temperature for carbon dioxide gas? If required, they should be treated separately, taking into account the optimal solution for removing water. If low-temperature carbon dioxide gas is required, a cold dryer solution can be considered; if high-temperature carbon dioxide gas is needed, a heated adsorption-based water removal method should be chosen. Of course, there are many ways to remove water; the key is whether they meet your process requirements!
This hyperacidic desiccant will do, such as concentrated sulfuric acid or phosphorus pentoxide.
Water vapor can only be condensed by applying pressure and lowering temperature
Thank you all·································
50 is too high; lowering it to 30 would be better
Who can **simply summarize the methods for removing water vapor?** If only cooling is applied, the water vapor concentration can be reduced at most to the saturated vapor pressure at that temperature; considering entrainment, it may even need to be higher than this value. I think using a desiccant is a reliable option, as it can reduce the water vapor content to very low levels. But it’s unknown whether desiccants will contaminate the process gas~
I think it still depends on the specific processing conditions; if you have access to good cooling capacity, you might as well use it to lower the temperature. If it does not affect the process requirements and there is a high-pressure section later on, it can also be removed in that high-pressure section ； If optimization is not possible from a technical standpoint, use an adsorbent instead. Also, how can CO2 carry so much water vapor? This is something that needs to be considered at the source as well.
Energy conservation must be taken into account when selecting a process scheme!
Dude, there are no parameters at all – how can you give an answer in such general terms?