SHIINEYSI

  • Sifeynta molecular

Sifeynta molecular

  • Sharaxaada
  • Unugyada maaddooyinka kala duwan waxaa lagu kala saaraa mudnaanta iyo xajmiga xayeysiinta, sidaas darteed sawirka waxaa loo yaqaan "shaandho molecular".
  • Shaandho molecular (sidoo kale loo yaqaan zeolite synthetic) waa crystal microporous silicate.Waa qaab-dhismeedka aasaasiga ah ee qalfoofka oo ka kooban silikoon aluminate, oo leh biraha birta ah (sida Na +, K +, Ca2 +, iwm.) si loo dheellitiro kharashka xun ee xad-dhaafka ah ee crystal.Nooca shaandhada molecular inta badan waxa loo qaybiyaa nooca A, nooca X iyo nooca Y iyadoo loo eegayo qaabdhismeedkeeda crystal.
 

Qaabka kiimikaad ee unugyada zeolite

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

Mx/n.

Cation ion, ilaalinta kristanta koronto ahaan dhexdhexaad ah

(AlO2) x (SiO2) y

Qalfoofka kiristaalo zeolite, oo leh qaabab kala duwan oo godadka iyo kanaalada

H2O

Uumiga biyaha jidh ahaan isku dhejiyay

Astaamaha

Adsorption iyo desorption dhowr ah ayaa la samayn karaa

 

Nooca shaandhada AMolecular

 1

Qaybta ugu muhiimsan ee nooca A shaandhada molecular waa silicon aluminate.Daloolka ugu weyn ee crystal waa qaab-dhismeedka octaring. Daloolka daloolka ugu weyn waa 4Å(1Å=10-10m), oo loo yaqaano nooca 4A (sidoo kale loo yaqaano nooca A) shaandho molecular;Ku beddel Ca2 + Na + ee shaandhada molecular ee 4A, samaynta dalool 5A ah, kuwaas oo ah nooca 5A (aka calcium A) shaandho molecular; K+ oo ah shaandho molecular 4A, samaynaysa dalool 3A ah, oo ah 3A (aka potassium A) shaandho molecular.

Nooca X shaandho molecular

2

Qaybta ugu muhiimsan ee X shaandho molecular waa silicon aluminate, godka crystal ugu weyn waa laba iyo toban element giraanta qaab dhismeedka.Different crystal qaab dhismeedka shaandheeyo molecular oo leh dalool ah 9-10 A, loo yaqaan 13X (sidoo kale loo yaqaan nooca sodium X) shaandho molecular ;Ca2 + lagu beddelay Na + shaandho molecular 13X, samaynta shaandho molecular ah oo leh dalool 8-9 A, oo loo yaqaan 10X (sidoo kale loo yaqaan calcium X) shaandho molecular.

   
  • Codsiga
  • Xayeysiintu waxay ka timaadaa xayeysiis jireed (Vander Waals Force), oo leh polarity xooggan iyo beero Coulomb ah oo ku dhex jira daloolkeeda crystal, oo muujinaya awoodda adsorption ee molecules polar (sida biyaha) iyo molecules aan saturated ahayn.
  • Qaybinta daloolka shaandhada molecular waa mid isku mid ah, oo kaliya walxaha leh dhexroorka kelli ka yar dhexroorka daloolka ayaa geli kara godka crystal ee gudaha shaandhada molecular.

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