Efficiency of pressure swing adsorption air separation for nitrogen production
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As the title suggests, I would like to know about the requirements regarding nitrogen purity levels of 99.9%, 99.99%, and 99.999%. Additionally, I’m interested in the efficiency of pressure swing adsorption nitrogen production – that is, how much nitrogen can be obtained from one volume of air? :handshake
Purity should be related to flow rate, right?
What the original poster is asking about is actually the yield of PSA units, which is also a key indicator for PSA systems. Based on a production rate of 1000 Nm3/h of nitrogen, domestic manufacturers can be considered to perform well if they achieve the following figures: at a N2 concentration of 99%, the yield is around 45%； At an N2 concentration of 99.5%, the yield is ~40% ； At an N2 concentration of 99.9%, the yield is ~32% ； At an N2 concentration of 99.99%, the yield is ~29% ； At an N2 concentration of 99.999%, the yield is ~20% ； At an N2 concentration of 99.9995%, the yield is ~17% ；
Reply to 4# arpcd Thank you! That’s quite low. The air normally contains 70% nitrogen; for 99.999%, only 0.7*0.2 = 0.14 of the nitrogen can be obtained from 1 volume of air, with 0.86 being wasted
If it’s a one-step process, it’s probably not possible to determine the nitrogen-to-air ratio for the brother on the 4th floor, right? OP, pressure swing adsorption has efficiency issues; you can’t simply assume that since 79% of air is nitrogen, it can be completely separated – that’s not possible.
Dear master, is this data reliable? ? I want to use these data
Different manufacturers’ equipment comes with varying guaranteed yields, but the deviations are not significant; if you’re considering purchasing such equipment, it’s a good idea to consult several suppliers to get more information.