Awọn paati akọkọ ninu afẹfẹ jẹ nitrogen ati atẹgun, lilo iwọn otutu ibaramu, nitrogen ati atẹgun ninu afẹfẹ ni iṣẹ adsorption zeolite molecular sieve (ZMS) yatọ (atẹgun le kọja ati adsorption nitrogen), ṣe apẹrẹ ilana ti o yẹ, ati ṣe nitrogen. ati atẹgun Iyapa lati gba atẹgun.