Tus nasMuaj ntau lub crystal qauv, suav nrog -al₂o₃, -al₂o₃, θ₂₂₃, thiab lwm yam ntawm cov chaw siab ({m² \/ g) thiab muaj ntau cov nplaim acid. Muaj ntau ntau cov pawg hydroxyl nyob rau ntawm Alumina, uas tuaj yeem tsim cov khoom siv hydrogen lossis kev sib koom tes nrog ntau yam molecules, yog li qhia tau cov adsorption ntau yam.
Lub zog lub cev ntawm Alumina, xws li thaj tsam thaj tsam tshwj xeeb, muaj lub ntim loj, muaj qhov cuam tshuam tseem ceeb ntawm nws txoj kev ua tiav kev tshaj tawm. Feem ntau hais lus, qhov loj dua qhov chaw tshwj xeeb thaj tsam, qhov muaj peev xwm tshaj tawm; Lub pore loj faib txiav txim siab txog kev nkag tau ntawm cov adsorbate molecules; Thiab cov pore ntim cuam tshuam qhov diffusion thiab thauj khoom ntawm adsorbate. Tsis tas li ntawd, tus nqi sib txawv ntawm alumina sib txawv nrog pH, thiab nthuav tawm cov kev qhia sib txawv ntawm lub npe ntawm isoelectric (ph 8-9).
Adsorption mechanism ntawm alumina feem ntau yog muaj ob daim ntawv: kev kos duab lub cev thiab tshuaj kos duab. Lub cev adsorption tsuas yog cia siab rau cov van der waquals rog, thaum cov tshuaj adsorption cuam tshuam nrog cov neeg hydoxyl ntawm pawg hydoxyl thiab adsorbates. Rau cov tshuaj ionic, cov tshuaj Alumina tuaj yeem ua tiav ion pauv adsorption los ntawm cov hluav taws xob cuam tshuam. Piv txwv li, cov adsorption ntawm cov hlau hnyav ions los ntawm alumina feem ntau koom nrog kev sib txuas lus sib pauv cov pawg ntawm pawg hydroxyl.
Muaj ntau ntau yam uas cuam tshuam kev tshaj tawm kev ua haujlwm ntawm alumina, suav nrog kev daws hluav taws xob pu, kub, rov qab lub sijhawm, thiab kev sib cuag ions. Ph tsis tsuas yog cuam tshuam rau cov chaw them nyiaj saum npoo ntawm alumina, tab sis kuj yog txiav txim siab lub hav zoov ntawm adsorbate. Muaj qhov kub thiab txias yog feem ntau txaus kho rau cov tshuaj ua yeeb yam tab sis tsis yog rau lub cev adsorption. Thawj lub sijhawm thiab cov sijhawm sib cuag cuam tshuam rau Adsorption Kinetics thiab equilibrium. Ib qho ntxiv, txoj kev npaj ua haujlwm thiab cov txheej txheem kev kho mob tom ntej ntawm alumina kuj tseem tuaj yeem hloov pauv cov yam ntxwv tau tshaj tawm.
Cov adsorption cov yam ntxwv ntawm Alumina cuam tshuam los ntawm ntau yam, ntawm kev hloov kho deg yog qhov tseem ceeb txhais tau tias yuav tsum tau tswj hwm nws cov kev tshaj tawm adsorption. Lub saum npoo acidity thiab alkalinity ntawm alumina tuaj yeem hloov pauv, tus naj npawb ntawm cov chaw nquag tuaj yeem qhia tau ntau pab pawg, kev kho cov alkali, lossis thauj lwm cov hlau oxides. Piv txwv li, cov ntsiab lus sulfate nyob rau saum npoo ntawm alumina kho nrog sulfuric acid nce, thiab adsorption muaj peev xwm rau cations yog txhim kho; Thaum alumina thauj nrog hlau oxide muaj cov adsorption muaj peev xwm rau arsenate.
Cov qauv siv lead ua ntawm alumina kuj cuam tshuam nws cov kev kawm tiav. -Ar₂o₃ feem ntau ua rau cov kev ua yeeb yam zoo dua -al₂o₃ vim nws cov chaw sib txuas lus ntxiv thiab cov chaw ua haujlwm tsis muaj tseeb. Ib qho ntxiv, kev npaj cov qauv xws li Sol-gel txoj kev, hom qauv kev ua qauv ntawm alumina, yog li ua kom zoo dua nws cov loj hloov kev ua tau zoo thiab muaj peev xwm adsorption.
Hauv kev kho dej, Alumina tau siv dav los tshem tawm cov hlau ions, fluorides, phosphatates thiab organic paug los ntawm dej. Cov kev tshawb fawb tau pom tias qhov muaj peev xwm adsorption ntawm alumina rau cov neeg siv hluav taws xob hnyav xws li PB²⁺, CU²⁺, CU²⁺ tuaj yeem mus txog {} mg \/ g. Nyob rau hauv cov nqe lus ntawm cov roj purification, alumina tuaj yeem siv ua tus desiccant tshem ya kom noo, thiab tseem tuaj yeem adsorb acidic roj av xws li so₂ thiab NOx. Los ntawm kev hloov kho saum npoo, cov adsorption xaiv ntawm alumina rau cov gases tshwj xeeb tuaj yeem txhim kho.
Nyob rau hauv daim teb ntawm catalysis, alumina tsis yog tsuas yog cov cab kuj zoo heev, tab sis kuj muaj cov kev ua haujlwm catalytic nws tus kheej. Nws cov chaw saum npoo av tuaj yeem koom nrog ntau yam kev sib cav sib ceg, xws li kev tawg, isomerization thiab alkylation. Tsis tas li ntawd, Alumina kuj muaj cov ntawv thov tseem ceeb hauv Chromatographic, tshuaj kho kom raug tshem tawm thiab kev nkim nuclear.
Raws li kev ua tau zoo thiab muaj ntau yam ntxiv ua ke, tus nasTau qhia dav dav kev cia siab rau kev tiv thaiv ib puag ncig, kev lag luam hluav taws xob kom muaj zog thiab tshuaj lom neeg. Nrog rau kev txhim kho ntawm nanotechnology thiab cov kev hloov kho ntawm lub ntsej muag thiab cov adsorption ntawm alumina yuav tau zoo ntxiv, muab cov peev txheej ntxiv rau kev daws teeb meem ib puag ncig.
Yog tias koj muaj lwm cov lus nug lossis xav tau txog Alumina, thov hu rau peb!