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Molecular Sieve JZ-ZMS3
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Molecular Sieve JZ-ZMS4
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Molecular Sieve JZ-ZMS5
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Molecular Sieve JZ-ZMS9
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Molecular Sieve Powder JZ-ZT
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Molecular Sieve JZ-AZ
- Kev piav qhia
- Cov molecules ntawm cov khoom sib txawv yog qhov txawv ntawm qhov tseem ceeb thiab qhov loj ntawm adsorption, yog li cov duab hu ua "molecular sieve".
- Molecular sieve (tseem hu ua hluavtaws zeolite) yog silicate microporous siv lead ua.Nws yog ib qho yooj yim skeleton qauv tsim ntawm silicon aluminate, nrog cov hlau cations (xws li Na +, K +, Ca2 +, thiab lwm yam) kom sib npaug cov nqi tsis zoo nyob rau hauv cov siv lead ua.Hom molecular sieve feem ntau muab faib ua hom A, X thiab Y hom raws li nws cov qauv siv lead ua.
| Cov tshuaj formula ntawm zeolite hlwb | Mx/n [(AlO.2) x (SiO.2) y]WH.2O. |
| Mx/n. | Cation ion, ua kom cov siv lead ua hluav taws xob nruab nrab |
| (AlO2) x (SiO2) y | Lub cev pob txha ntawm zeolite muaju, nrog cov duab sib txawv ntawm qhov thiab cov kab |
| H2O | lub cev adsorbed dej vapor |
| Nta | Ntau yam adsorption thiab desorption tuaj yeem ua tau |
| Hom AMolecular sieve | | Lub ntsiab tivthaiv ntawm hom A molecular sieve yog silicon aluminate.Lub ntsiab siv lead ua qhov yog octaring qauv.Qhov aperture ntawm lub ntsiab siv lead ua aperture yog 4Å(1Å=10-10m), hu ua hom 4A (tseem hu ua hom A) molecular sieve;Hloov Ca2 + rau Na + hauv 4A molecular sieve, tsim ib qho aperture ntawm 5A, uas yog ib hom 5A (aka calcium A) molecular sieve; K + rau 4A molecular sieve, tsim ib qho aperture ntawm 3A, uas yog 3A (aka poov tshuaj A) molecular sieve. |
| Hom X molecular sieve |
| Lub ntsiab tseem ceeb ntawm X molecular sieve yog silicon aluminate, lub ntsiab siv lead ua lub qhov yog kaum ob lub nplhaib qauv. Cov qauv siv lead ua sib txawv tsim cov qauv siv lead ua molecular sieve nrog aperture ntawm 9-10 A, hu ua 13X (tseem hu ua sodium X hom) molecular sieve. ; Ca2 + pauv rau Na + hauv 13X molecular sieve, tsim cov molecular sieve siv lead ua nrog aperture ntawm 8-9 A, hu ua 10X (tseem hu ua calcium X) molecular sieve. |
- Daim ntawv thov
- Lub adsorption ntawm cov khoom yog los ntawm lub cev adsorption (vander Waals Force), muaj zog polarity thiab Coulomb teb nyob rau hauv nws cov siv lead ua qhov, qhia muaj zog adsorption muaj peev xwm rau polar molecules (xws li dej) thiab unsaturated molecules.
- Lub aperture faib ntawm molecular sieve yog heev sib xws, thiab tsuas yog cov khoom uas muaj ib tug molecular txoj kab uas hla me tshaj lub qhov taub yuav nkag mus rau hauv lub crystal qhov nyob rau hauv lub molecular sieve.