• Sieve Molecular

Sieve Molecular

  • 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

 

Ụdị sieve AMolecular

 1

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;Gbanwee Ca2 + maka Na + na sieve molecular 4A, na-akpụ oghere nke 5A, ya bụ ụdị 5A (aka calcium A) sieve molecular; K+ maka sieve molecular 4A, na-akpụ oghere nke 3A, ya bụ 3A (aka. potassium A) molekụla sieve.

Ụdị X molekụla sieve

2

Akụkụ bụ isi nke sieve molecular X bụ silicon aluminate, oghere kristal bụ isi ihe mgbanaka iri na abụọ. Ọdịdị kristal dị iche iche na-etolite kristal molecular sieve nwere oghere nke 9-10 A, nke a na-akpọ 13X (nke a makwaara dị ka ụdị sodium X) sieve molecular sieve. ;Ca2 + gbanwere Na + na 13X molecular sieve, na-akpụ kristal sieve molecular na oghere nke 8-9 A, nke a na-akpọ 10X (nke a makwaara dị ka calcium X) sieve molecular.

   
  • 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.

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