Sieve ya maselo

Sieve ya molekyulu ndi adsorbent yolimba yomwe imatha kulekanitsa mamolekyu amitundu yosiyanasiyana. Ndi SiO2, Al203 ngati crystalline aluminium silicate yokhala ndi gawo lalikulu. Pali mabowo ambiri amtundu wina mu kristalo wake, ndipo pali mabowo ambiri amtundu womwewo pakati pawo. Imatha kutsatsa mamolekyu ang'onoang'ono kuposa momwe ma pore awiriwa amalowera mkati mwa dzenje, ndikupatula mamolekyulu akulu kuposa pobowo kupita kunja, kusewera ngati sieve.

Sieve ya mamolekyulu imakhala ndi mphamvu zoyamwitsa chinyezi, ndipo pafupifupi zosungunulira zonse zimatha kugwiritsidwa ntchito kuumitsa, motero zimagwiritsidwa ntchito kwambiri mu labotale ndi mafakitale. Molecular sieve adsorption njira ndi madzi m'thupi ndi otsika mphamvu mowa ndi mkulu dzuwa, ndondomeko ndi losavuta, oyenera kwambiri kutaya madzi m'thupi la madzi ndi mpweya, ntchito kukula kwa maselo sieve kabowo kusankha adsorption madzi, kuti kukwaniritsa kulekana.

Kukhazikika kwamafuta a sieve yama cell ndikwabwino, komwe kumatha kupirira kutentha kwapang'onopang'ono kwa 600C ~ 700C, ndi kutentha kwatsopano sikuyenera kupitirira 600C, mwinamwake kumakhudza ntchito ya sieve ya maselo, ndipo ikhoza kutulutsidwa (palibe kusinthika kwamafuta). Sieve ya molekyulu sisungunuka m'madzi, koma imasungunuka mu ma acid amphamvu ndi alkali, kotero imatha kugwiritsidwa ntchito pakati pa pH5 ~ 11. Sieve yama cell ndi yosavuta kuyamwa madzi, iyenera kusindikizidwa yosungirako, kugwiritsa ntchito kuyenera kuyang'ana ngati madziwo apitilira muyezo, kusungidwa kwanthawi yayitali mayamwidwe a chinyezi, kuyenera kugwiritsidwa ntchito mukatha kugwiritsa ntchito, magwiridwe ake osasinthika. Sieve ya molekyulu imakhala ndi mawonekedwe othamanga kwambiri, nthawi zambiri zosinthika, kuphwanya kwakukulu ndi kukana kuvala, kukana kuwononga kwambiri, kugwiritsa ntchito bwino kwambiri, moyo wautali wautumiki, ndi zina zambiri, yomwe ndi desiccant yomwe imakonda kwambiri pakuyanika kwa gasi ndi madzi.