Residual adsorption capacity of molecular sieve
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What should be the residual adsorption capacity of molecular sieves (reusable)? Why?
The less reserve there is, the worse the adsorption effect; it’s a matter of balance – the closer to saturation, the worse the adsorption capacity. Generally, this range is 18-20%, and it depends on the humidity of the adsorbent medium; higher humidity leads to a greater degree of saturation
Is there a standard?:lol:lol
There is no unified standard. I agree with the person in post 2: it often takes some time for molecular sieve adsorption to reach an equilibrium state (that is, saturation). I think the remaining adsorption capacity of the molecular sieve is related to the requirements regarding the amount of the medium to be adsorbed; it also depends on the ratio between the amount of that medium and the saturated adsorption capacity of the molecular sieve. Specifically, the application conditions may provide criteria for optimizing the adsorption process using molecular sieves.
It can be understood in this way: the adsorption time of a conventional molecular sieve adsorber is 30 minutes longer than its normal operating time. At present, the adsorption time for molecular sieves in air separation units is around 240 minutes (for type 1 molecular sieves); therefore, a simple calculation shows that there is an additional 11% of adsorbent in the adsorber – which is why 10% more adsorbent is used~~