Molecular siievesyog cov ntaub ntawv tseem ceeb rau roj thiab kua sib cais thiab ua kom huv huv nyob rau ntau yam kev lag luam. Lawv yog crystalline metalloaluminates nrog cov ris tsho hnav uas xaiv adsorb molecules raws lawv qhov loj me thiab cov duab. TusTsim cov txheej txheem ntawm molecular sieveskoom nrog ntau cov kauj ruam nyuaj los xyuas kom muaj cov ntaub ntawv tsim muaj cov khoom siv zoo nrog cov khoom siv muaj feem ntau thiab cov khoom.
Kev tsim cov molecular sieves pib nrog xaiv cov ntaub ntawv raw, suav nrog sodium silicate, alumina thiab dej. Cov ntaub ntawv no tau sib xyaw ua ke hauv cov txiaj ntsig los tsim cov homogeneous gel, uas yog tom qab ntawd tau raug rau cov txheej txheem hydrotheresis. Nyob rau theem no, lub gel yog rhuab rau high temper to in nyob rau hauv muaj cov tshuaj alkaline los txhawb kom tsim kev tsim cov qauv siv lead ua ke.
Tom ntej no cov theem tom ntej hauv kev tsim khoom yog ion txauv, uas cuam tshuam nrog hloov cov qauv Sodium nrog lwm cov kab ke xws li cov tshuaj calcium, cov poov tshuaj lossis magsium lossis magsium lossis magsium. Cov txheej txheem kev sib pauv hluav taws xob no tseem ceeb rau kev tswj hwm kev ua yeeb yam ntawm molecular sieves, suav nrog kev tshaj tawm muaj peev xwm thiab xaiv tau. Hom kev sib hloov siv rau ion sib pauv yog nyob ntawm cov kev xav tau ntawm cov kev cai tshwj xeeb ntawm cov molecular sab cib.
Tom qab ion txauv, cov molecular sieves yauv hla cov kauj ruam kev ntxhua khaub ncaws thiab cov kauj ruam kom tshem tawm cov txheej txheem impurities thiab cov khoom seem los ntawm cov txheej txheem ntau lawm. Qhov no ua kom pom tseeb tias cov khoom kawg ua tau raws li cov qauv kev pharity uas yuav tsum muaj rau cov ntawv thov kev lag luam. Tom qab kev ntxuav thiab kev ziab txheej txheem tiav, cov roj ntsha cov lus kub tau calcine kom ruaj khov rau ruaj khov cov qauv siv lead ua thiab tshem tawm cov khoom seem uas tseem tshuav.
Cov kauj ruam kawg hauv kev tsim khoom lag luam cuam tshuam nrog kev ua kom cov molecular sieves los npaj lawv rau kev sau cov ntawv thov adsorption. Cov txheej txheem ua kom muaj zog no feem ntau cuam tshuam nrog cua sovmolecular sab cibNtawm qhov kub kub kom tshem tawm cov dej noo thiab txhim kho nws cov khoom tshaj tawm adsorption. Lub sijhawm thiab ntsuas kub ntawm cov txheej txheem ua kom ua kom tiav kom ua tiav qhov xav tau huab cua loj thiab thaj tsam ntawm cov molecular sab cib.
Molecular siieves muaj nyob rau hauv txawv qhov ntau thiab tsawg ntau rau 3a, 4a thiab 5a, txhua qhov haum rau cov ntawv thov. Piv txwv li,3A molecular siievesfeem ntau siv rau lub cev qhuav dej thiab kua, thaum4a thiab 5a molecular siievesyog nyiam rau adsorbing loj molecules thiab tshem impurities xws li dej thiab carbon dioxide.
Hauv cov ntsiab lus, kev tsim cov molecular sieves yog ib txheej txheem ua ke nrog cov kauj ruam tseem ceeb uas cuam tshuam nrog ntau cov kauj ruam tseem ceeb, suav nrog hydrinthmal synthesis, suav nrog hydrincticated synthesis, suav nrog hydrincticated synthesis, suav nrog hydrincticated synthesis, suav nrog hydrinmalmal synthesis, xws li kev ntxuav, kom qhuav, thiab kev ua kom ua kom muaj zog, thiab kev ua kom ua kom muaj zog, thiab kev ua kom ua kom muaj zog, thiab kev ua kom ua kom muaj zog. Cov kauj ruam no yog ua tib zoo tswj cov khoom lag luammolecular siievesNrog cov khoom lag luam customized thiab pore ntau thiab tsawg kom tau raws li cov kev xav tau ntawm kev lag luam xws li petrochemical, tshuaj thiab kev ua pa roj. Siab zooMolecular sieves tsimLos ntawm cov neeg tsim khoom siv tau ua lub luag haujlwm tseem ceeb hauv kev ua tiav kev sib cais ua tiav thiab cov txheej txheem lim dej hauv ntau cov ntawv thov.
Lub Sijhawm Post: Apr-19-2024