3A Sefa ya Maselo
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Kutaya Madzi m'thupi mu sieve ya molekyulu ya distillation Tower/Desiccant/Adsorbent/Hollow glass
Sieve ya molecular 3A, yomwe imadziwikanso kuti sieve ya molecular KA, yokhala ndi malo otseguka a ma angstrom atatu, ingagwiritsidwe ntchito poumitsa mpweya ndi zakumwa komanso kuchepetsa madzi m'ma hydrocarbon. Imagwiritsidwanso ntchito kwambiri poumitsa mafuta, mpweya wosweka, ethylene, propylene ndi mpweya wachilengedwe.
Mfundo yogwirira ntchito ya ma sieve a mamolekyulu imagwirizana kwambiri ndi kukula kwa ma pore a ma sieve a mamolekyulu, omwe ndi 0.3nm/0.4nm/0.5nm motsatana. Amatha kuyamwa mamolekyu a mpweya omwe mainchesi ake ndi ochepa kuposa kukula kwa ma pore. Kukula kwa ma pore kukakhala kwakukulu, mphamvu ya kuyamwa imakula. Kukula kwa ma pore ndi kosiyana, ndipo zinthu zomwe zimasefedwa ndikulekanitsidwa nazonso zimasiyana. Mwachidule, sieve ya mamolekyulu ya 3a imatha kuyamwa mamolekyulu omwe ali pansi pa 0.3nm, sieve ya mamolekyulu ya 4a, mamolekyu odulidwa ayeneranso kukhala ochepera 0.4nm, ndipo sieve ya mamolekyulu ya 5a ndi yofanana. Ikagwiritsidwa ntchito ngati desiccant, sieve ya mamolekyulu imatha kuyamwa mpaka 22% ya kulemera kwake mu chinyezi.
