• Sieve ya Molecular

Sieve ya Molecular

  • Kufotokozera
  • Mamolekyu azinthu zosiyanasiyana amasiyanitsidwa ndi kufunikira ndi kukula kwa adsorption, kotero chithunzicho chimatchedwa "molecular sieve".
  • Sieve ya molekyulu (yomwe imadziwikanso kuti synthetic zeolite) ndi silicate microporous crystal.Ndiwo maziko a mafupa omwe amapangidwa ndi silicon aluminate, yokhala ndi zitsulo zachitsulo (monga Na +, K +, Ca2 +, ndi zina zotero) kuti zithetse vuto la kristalo.Mtundu wa sieve ya mamolekyulu umagawidwa makamaka kukhala mtundu wa A, mtundu wa X ndi mtundu wa Y malinga ndi kapangidwe kake ka kristalo.
 

Chemical formula ya maselo a zeolite

Mx/n [(AlO.2) x (SiO.2) y]WH.2O.

mx/n.

cation ion, kusunga kristalo magetsi osalowerera ndale

(AlO2) x (SiO2) y

Chigoba cha makristalo a zeolite, okhala ndi mawonekedwe osiyanasiyana a mabowo ndi ngalande

H2O

thupi adsorbed madzi nthunzi

Mawonekedwe

Ma adsorption angapo ndi desorption amatha kuchitidwa

 

Lembani sieve ya Amolecular

 1

Chigawo chachikulu cha mtundu A molecular sieve ndi silicon aluminate.Bowo lalikulu la kristalo ndi mawonekedwe a octaring.Kutsegula kwa kabowo kakang'ono ka kristalo ndi 4Å(1Å=10-10m), yotchedwa mtundu wa 4A (wotchedwanso mtundu A) sieve ya molekyulu;Sinthani Ca2 + ya Na + mu sefa ya molekyulu ya 4A, kupanga kabowo ka 5A, komwe ndi mtundu wa 5A (aka calcium A) sieve ya molekyulu; K+ ya 4A sieve ya molekyulu, kupanga pobowo ya 3A, yomwe ndi 3A (aka potaziyamu A) molekyulu sieve.

Type X molecular sieve

2

Chigawo chachikulu cha X molecular sieve ndi silicon aluminate, dzenje lalikulu la kristalo ndi mapangidwe a mphete khumi ndi ziwiri. Mapangidwe a kristalo osiyanasiyana amapanga kristalo wa molecular sieve wokhala ndi 9-10 A, wotchedwa 13X (wotchedwanso sodium X mtundu) molecular sieve. ;Ca2 + anasinthanitsa Na + mu 13X sieve ya molekyulu, kupanga molecular sieve crystal yokhala ndi 8-9 A, yotchedwa 10X (yomwe imadziwikanso kuti calcium X) molecular sieve.

   
  • Kugwiritsa ntchito
  • Kutsatsa kwazinthu kumachokera ku kutengeka kwakuthupi (vander Waals Force), yokhala ndi polarity yolimba ndi minda ya Coulomb mkati mwa dzenje la kristalo, kuwonetsa mphamvu yamphamvu ya mamolekyu a polar (monga madzi) ndi mamolekyu osatha.
  • The kabowo kabowo sieve maselo ndi yunifolomu, ndi zinthu zokha ndi molecular awiri ang'onoang'ono kuposa dzenje awiri akhoza kulowa mu dzenje galasi mkati mwa maselo sieve.

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