Qhov sib txawv tseem ceeb ntawm cov tshuab ua kom alumina thiab molecular sieve yog tias activated alumina muaj cov pores ntau heev, whereas molecular sieve muaj qhov sib piv cov pores tsawg.
Activated alumina thiab molecular sieve yog cov khoom siv uas muaj txiaj ntsig zoo hauv kev nqus dej ua adsorbents. Cov ntaub ntawv no muaj peev xwm adsorption muaj zog rau dej vapour.
Alumina Activated yog dab tsi?
Activated alumina yog cov khoom ntxeem tau ua los ntawm txhuas oxide. Cov khoom no yog tsim los ntawm dihydroxylation ntawm aluminium hydroxide. Lub cheeb tsam ntawm cov khoom no yog siab heev, txog 200 square meters ib gram. Activated alumina yog ib qho tseem ceeb raws li lub desiccant uas tuaj yeem ua kom cov khoom qhuav los ntawm kev nqus dej los ntawm cov huab cua ib puag ncig. Tsis tas li ntawd, cov khoom siv no tuaj yeem siv ua lim dej ntawm fluoride, arsenic thiab selenium hauv dej haus.
Activated alumina muaj qhov loj ntawm thaj tsam-rau-qhov hnyav piv. Qhov no yog vim tias cov khoom no muaj ntau qhov "zoo li" pores.
Daim duab 01: Qhov tshwm sim ntawm Activated Alumina
Muaj ntau daim ntawv thov ntawm alumina activated, suav nrog cov ntawv thov catalyst, siv los ua cov khoom siv desiccant, ua cov tshuaj fluoride adsorbent, hauv tshuab nqus tsev, ua biomaterial, thiab defluoridation. Nyob rau hauv cov ntawv thov catalyst, activated alumina yog ib qho tseem ceeb raws li ib tug catalyst nyob rau hauv polyethylene ntau lawm, hydrogen peroxide ntau lawm, thiab lwm yam. Raws li ib tug desiccant, activated alumina yog pab tau rau adsorption vim hais tias cov dej nyob rau hauv cov huab cua sticks rau alumina nws tus kheej nyob rau hauv lub pores. Tom qab ntawd, cov dej molecules tau daig. Tsis tas li ntawd, cov khoom no muaj txiaj ntsig zoo hauv kev tshem tawm cov tshuaj fluoride ntawm cov dej haus.
Molecular Sieve yog dab tsi?
Molecular sieve yog cov khoom ntxeem tau uas muaj qhov pores nrog qhov loj me. Txoj kab uas hla ntawm cov pores no zoo ib yam li qhov loj ntawm cov molecules me me. Yog li ntawd, cov molecules loj tsis tuaj yeem dhau los ntawm cov pores, thiab lawv tau adsorbed, tab sis cov molecules me tuaj yeem dhau los ntawm cov pores. Peb tuaj yeem ntsuas lub cheeb ntawm molecular sieve siv chav Angstrom lossis nanometers.
Daim duab 02: Qhov tshwm sim ntawm Molecular Sieve
Thaum sib tov ntawm cov molecules tsiv los ntawm lub txaj nyob ruaj ruaj ntawm cov khoom ntxeem tau thiab cov khoom ib nrab (lub sieve), cov khoom uas muaj qhov hnyav molecular yuav tawm hauv txaj ua ntej; tom qab ntawd los ntawm cov molecules me me zuj zus. Yog li ntawd, cov molecular sieves yog pab tau nyob rau hauv chromatography. Qee hom molecular sieves muaj txiaj ntsig zoo li desiccants.
Txawm hais txog kev siv cov khoom siv molecular sieve, peb tuaj yeem siv nws hauv kev lag luam roj av rau ziab cov roj ntws. Peb tuaj yeem siv cov tshuaj no kom qhuav cov kuab tshuaj uas suav nrog cov desiccants hnyav. Ntxiv mus, muaj cov ntawv thov catalytic uas tuaj yeem ua rau isomerization, alkylation, thiab epoxidation. Tsis tas li ntawd, peb tuaj yeem siv molecular sieves rau kev pom cov khoom siv cua hauv cov cuab yeej ua pa xws li scuba divers thiab tua hluav taws.
Qhov txawv ntawm Activated Alumina thiab Molecular Sieve yog dab tsi?
Activated alumina thiab molecular sieves yog cov khoom ntxeem tau. Activated alumina yog cov khoom ntxeem tau ua los ntawm txhuas oxide thaum molecular sieve yog cov khoom ntxeem tau muaj qhov pores nrog qhov loj me. Yog li ntawd, qhov sib txawv tseem ceeb ntawm activated alumina thiab molecular sieve yog tias activated alumina muaj cov pores ntau heev, whereas molecular sieve muaj comparatively tsawg pores.
Hauv qab no yog cov ntsiab lus ntawm qhov sib txawv ntawm cov khoom siv alumina thiab molecular sieve hauv daim ntawv.
Summary – Activated Alumina vs Molecular Sieve
Activated alumina thiab molecular sieve yog cov khoom siv uas muaj txiaj ntsig zoo hauv kev nqus dej ua adsorbents. Qhov sib txawv tseem ceeb ntawm activated alumina thiab molecular sieve yog tias activated alumina muaj cov pores ntau heev, whereas molecular sieve muaj piv rau tsawg pores.
