Hauv ntau cov hauj lwm muaj, noo kev tswj hwm yog qhov ntsuas tseem ceeb kom ntseeg tau tias cov khoom lag luam zoo, kev ua haujlwm zoo, thiab kev ua haujlwm dhau los. Ib qho ntawm kev tswj cov kev nyab ua tau zoo tshaj plaws yog kev siv cov molecular sab cib desiccants. Cov desiccants muaj cov peev txheej adsorction zoo dua. Lawv yog tshwj xeeb hauv cov ntawv thov uas xav tau kom meej meej noo noo tswj nyob rau hauv cov kev mob nyuaj.
Dab tsi yog molecular siieves?
Molecular sieves yog crystalline qauv feem ntau yog tsim los ntawm aluminosilicates nrog cov khaub ncaws tsis muaj ntau. Cov yeeb yaj kiab no yog qhov loj me rau xaiv cov adsorb molecules ntawm cov diamos tsho tshwj xeeb thaum tsis suav cov qauv loj dua. Qhov kev xaiv adsorption no sib txawv ntawm cov molecular sieves los ntawm lwm cov Desiccants xws li Silica Gel thiab ua haujlwm Alumina.
Hom Molecular siieves
Muaj ntau hom molecular sieves. Txhua tus tau cais los ntawm lawv qhov ntau thiab tsawg, uas yog ntsuas ntsuas hauv angstroms (Å). Cov hom feem ntau siv suav nrog:
- 3A molecular siieves: Cov no muaj lub pore loj ntawm kwv yees li 3 angstroms. Lawv yog qhov tshwj xeeb ntawm adsorbing noo noo thaum tiv thaiv cov adsorption ntawm loj molecules zoo li tsis muaj cov hydrocarbons.
- 4a molecular siieves: Nrog lub pore loj li ntawm 4 lub angstroms, cov tub sab no tuaj yeem adsorb noo noo, thiab lwm yam me me roj molecules.
- 5a molecular sieves: Cov siieves muaj 5- anghas pore loj, ua rau lawv haum rau cais cov txiv ntseej los ntawm cov saw hlau thiab cyclic hydrocarbons.
- 13x molecular sieves: Muaj lub pore loj li 10 angstroms, 13 x cov neeg tuaj yeem adsorb loj dua molecules loj dua molecules thiab arched-saw hydrocarbons.
Cov Ntawv Qhia Tseem Ceeb
Molecular sab cib desiccants pom ntau yam kev lag luam vim lawv qhov muaj peev xwm siab tshaj plaws thiab xaiv tau:
- Petrochemical thiab nkev: Hauv cov lag luam no, cov tub rog molecular yog siv rau lub cev qhuav dej, tshem dej thiab lwm yam impurities los tiv thaiv pipeline corrosion thiab ua kom cov khoom siv kev phan.
- Kws Tshuaj: Molecular sieves tau siv rau ziab huab cua thiab roj hauv cov txheej txheem tsim khoom, ua kom muaj lub neej ruaj ntseg thiab txee noo-noo noo.
- Huab cua huv: Cov siieves no tau siv nyob rau hauv huab cua sib cais rau adsorb dej thiab cO2 los ntawm kev tsim cov cua compressed, kom muaj txiaj ntsig zoo ntawm cov pa roj av xws li oxygen xws li cov pa thiab nitrogen.
- Lub tub yees: Nyob rau hauv tub yees qhuav, molecular sieve, molecular sieve tshem tawm noo noo ntawm cov tub yees, tiv thaiv kom khov thiab tsim cov acids uas tuaj yeem ua rau kev ua haujlwm.
Qhov Zoo ntawm Cov Lus Si Molecular Sieves
Molecular sieves muab ntau cov txiaj ntsig tshwj xeeb:
- Siab Prsorption Muaj Peev Xwm: Lawv tuaj yeem adsorb ib qho ntau ntawm cov dej noo rau lawv qhov hnyav, muab cov desiccation ntev ntev
- Qhov Twg: Molecular sieves tuaj yeem tswj lawv cov kev ua tiav kev ua tiav ntawm qhov kub siab dua piv rau lwm yam Desiccants.
- Xaiv Adsorption: Muaj peev xwm xaiv Adsorb cov lwg me me ua rau lawv haum rau cov ntawv thov kom haum noo thiab tswj tsis raws cai tswj.
- Kev tsim xeeb: Molecular sieves tuaj yeem tsim tau los ntawm cua sov, tso cai rau kev siv rov qab thiab raug nqi.
Tag
Molecular sab cib desiccants ua lub luag haujlwm tseem ceeb hauv ntau qhov kev siv cov khoom siv uas ua kom muaj dej noo kev tswj hwm yog qhov tseem ceeb. Lawv cov khoom tshwj xeeb ntawm cov kev kawm muaj peev xwm siab, thiab xaiv adsorption ua rau lawv tsis muaj peev xwm tswj cov khoom lag luam zoo thiab ua haujlwm. Raws li kev lag luam txuas ntxiv mus hloov zuj zus thiab ua kom muaj zog ntau dua thiab cov khoom siv molecular yog yuav nthuav dav, cementing lawv qhov tseem ceeb hauv kev lag luam Indanalce.