Nkọwa
A na-amata ihe dị iche iche nke ihe dị iche iche site na mkpa na nha nke mgbasa ozi, n'ihi ya, a na-akpọ ihe oyiyi ahụ "nyochaa molecular".
Sive molecular (nke a makwaara dị ka zeolite sịntetik) bụ kristal silicate microporous.Ọ bụ usoro ọkpụkpụ bụ isi nke silicon aluminate mejupụtara, nwere cations ígwè (dị ka Na +, K +, Ca2 +, wdg) iji dozie ụgwọ na-adịghị mma na kristal.A na-ekewa ụdị sieve molekụla ka ọ bụrụ ụdị A, ụdị X na ụdị Y dị ka usoro kristal ya si dị.
| Usoro kemịkalụ nke mkpụrụ ndụ zeolite: | Mx/n [(AlO.2) x (SiO.2) y]WH.2O. |
| Mx/n:. | Cation ion, na-edebe kristal na-anọpụ iche na eletrik |
| (AlO2) x (SiO2) y: | Ọkpụkpụ nke kristal zeolite, nwere ụdị dị iche iche nke oghere na ọwa |
| H2O: | uzuoku mmiri nke anụ ahụ |
| Atụmatụ: | Enwere ike ịme ọtụtụ adsorption na desorption |
| Pịnye A Molecular Sieve | Akụkụ bụ isi nke ụdị A molecular sieve bụ silicon aluminate. Isi oghere kristal bụ usoro octaring. Oghere nke oghere kristal bụ 4Å (1Å = 10-10m), nke a maara dị ka ụdị 4A (nke a makwaara dị ka ụdị A) sieve molecular;
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| Ụdị X Molecular Sieve | Akụkụ bụ isi nke sieve molecular X bụ silicon aluminate, oghere kristal bụ isi ihe mgbanaka mgbanaka iri na abụọ. Ca2 + gbanwere Na + na sieve molecular 13X, na-eme kristal sieve molecular nwere oghere nke 8-9 A, nke a na-akpọ 10X (nke a makwaara dị ka calcium X) sieve molecular.
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Pịnye A Molecular Sieve
Ụdị X Molecular Sieve
Ngwa
Mgbasa ozi nke ihe na-abịa site na mgbasa ozi anụ ahụ (vander Waals Force), nke nwere polarity siri ike na ubi Coulomb n'ime oghere kristal ya, na-egosi ikike mgbasa ozi siri ike maka mkpụrụ ndụ polar (dị ka mmiri) na ụmụ irighiri mmiri na-adịghị.
Nkesa oghere nke sieve molecular bụ otu, na naanị ihe nwere dayameta molekụla dị obere karịa dayameta oghere nwere ike ịbanye oghere kristal n'ime sieve molekul.