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  • Kwayoyin Sieve

Kwayoyin Sieve

  • Bayani
  • Kwayoyin abubuwa daban-daban suna bambanta ta hanyar fifiko da girman adsorption, don haka ana kiran hoton "Sive molecular".
  • Molecular sieve (kuma aka sani da roba zeolite) wani silicate microporous crystal.Tsarin kwarangwal ne na asali wanda ya ƙunshi silicon aluminate, tare da cations na ƙarfe (kamar Na +, K +, Ca2 +, da sauransu) don daidaita ƙarancin cajin mara kyau a cikin crystal.Nau'in sieve na kwayoyin halitta an raba shi zuwa nau'in A, nau'in X da nau'in Y bisa ga tsarinsa na crystal.
 

Tsarin sinadarai na ƙwayoyin zeolite

Mx/n [(AlO.2x (SiO.2y] da W.2O.

Mx/n.

Cation ion, kiyaye crystal tsaka tsaki na lantarki

(AlO2) x (SiO2) y

kwarangwal na lu'ulu'u na zeolite, tare da siffofi daban-daban na ramuka da tashoshi

H2O

tururin ruwa ta jiki

Siffofin

Ana iya aiwatar da adsorption da yawa da lalata

 

Rubuta AMolecular sieve

 1

Babban bangaren nau'in sieve kwayoyin A shine silicon aluminate.Babban ramin crystal shine tsarin octaring. Buɗewar babban buɗewar crystal shine 4Å (1Å = 10-10m), wanda aka sani da nau'in 4A (wanda aka fi sani da nau'in A) sieve kwayoyin;Musanya Ca2 + don Na + a cikin sieve kwayoyin 4A, yana samar da buɗaɗɗen 5A, wato nau'in 5A (aka calcium A) sieve na ƙwayoyin cuta; K+ don sieve kwayoyin 4A, yana samar da buɗaɗɗen 3A, wato 3A (aka potassium A) sieve kwayoyin.

Nau'in X kwayoyin sieve

2

Babban bangaren X kwayoyin sieve shine silicon aluminate, babban ramin crystal shine tsarin zobe na kashi goma sha biyu. Tsarin crystal daban-daban yana samar da crystal sieve na kwayoyin halitta tare da budewar 9-10 A, wanda ake kira 13X (wanda kuma aka sani da nau'in sodium X). ;Ca2 + musanya da Na + a cikin 13X kwayoyin sieve, samar da kwayoyin sieve crystal tare da budewar 8-9 A, wanda ake kira 10X (wanda aka fi sani da calcium X).

   
  • Aikace-aikace
  • Adsorption na kayan ya fito ne daga adsorption ta jiki (vander Waals Force), tare da ƙarfin polarity da filayen Coulomb a cikin ramin crystal ɗin sa, yana nuna ƙarfin adsorption don ƙwayoyin igiya (kamar ruwa) da ƙwayoyin da ba a cika ba.
  • Rarraba buɗaɗɗen ramin kwayoyin halitta iri ɗaya ne sosai, kuma abubuwa ne kawai da ke da diamita na ƙwayoyin cuta ƙasa da diamita na iya shiga ramin crystal a cikin simintin ƙwayoyin cuta.

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