What are the differences in the requirements for the adsorption capacity of molecular sieves toward N2O in membrane-based main-cooling air separation systems and bath-type main-cooling air separation systems?

There are no requirements for bath-type systems; however, requirements do exist for membrane-type systems. I’m not familiar with the specific requirements, but generally speaking, membrane-type systems have a relatively low safety factor, which makes them less safe and raises concerns. On the positive side, they offer good energy-saving effects, and the temperature difference for heat transfer can be kept very low

In principle, it should be \"completely removed,\" but I haven’t seen any specific numerical requirements defined as standards. Membrane primary coolers have higher requirements, as they are more prone to \"dry evaporation\" and \"dead-end boiling\" than bath-type primary coolers. Before the advent of membrane main coolers, the industry paid little attention to the hazards of nitrous oxide. For reference, here is a passage: “For newly designed air separators, an N2O adsorbent can be added to the molecular sieve adsorber; APCI claims to have successfully developed a specialized NO adsorbent.” In molecular sieve adsorbers, adding a 100 ml/n thick layer of 5A molecular sieve can almost completely absorb NO (typically, the adsorption efficiency of 13X molecular sieve for N2O is 85%–90%), and other adsorbents can also be incorporated into 13X (patent). Yes, the N2O that enters the refrigerator should be removed using a liquid nitrogen adsorber or a liquid oxygen adsorber. ”