How should low purity of the product gas from pressure swing adsorption be addressed?
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How should low purity of the product gas from pressure swing adsorption be addressed?
Increase pressure, lower temperature, extend regeneration time
Since the temperature and pressure of the feed gas generally cannot be changed, in order to increase the purity of the product gas, apart from extending the regeneration time, is it possible to achieve this goal by adjusting the adsorption time?
Reducing the adsorption time has a significant effect, but the product recovery rate decreases
Yeah, right! Extend the adsorption time!
The adsorption time should probably be increased appropriately.
Reduce the adsorption time. Because the adsorption time was too long, reaching the adsorbent’s capacity for adsorption, this led to CO penetration and the product gas becoming unqualified
The adsorption time was too short; a large amount of CO2 in the feed gas was not absorbed, so isn’t the CO2 level in the product gas high as well?
Think of it this way: when you pour water into a bucket, will it fill up faster if you pour for a short time, or will it take longer?
The time allocated is too short; it definitely won’t be full； If it’s poured for a long time, it might overflow. The same is true for pressure swing adsorption: if the adsorption time is too short, the purity of the product gas is low; if the adsorption time is too long, CO2 penetrates, resulting in low purity of the product gas as well. Therefore, what I said in my previous post was about modifying the adsorption time. Let’s analyze each case on its own.
Reduce adsorption time, lower the load, check the regeneration status