Gamma activated alumina, hu ua "activated alumina", yog ib hom ntxim siab dispersion khoom khoom.
γ-Al2O3 yog cov teeb pore kho, qhov tshwj xeeb ntawm qhov deg, kev ua kom zoo tshaj qhov dej, qhov zoo tshaj ntawm acidity thiab zoo thermal stability, microporous nto nrog cov khoom tsim nyog ntawm catalytic kev txiav txim, yog li ntawd ua feem ntau siv catalyst, catalyst carrier thiab chromatography carrier nyob rau hauv kev lag luam chemical thiab roj, thiab plays lub luag haujlwm tseem ceeb hauv cov roj hydrocracking, hydrogenation refining, hydrogenation kev hloov kho, cov dej dehydrogenation thiab tsheb cov kev ua kom tsis huv.
Gamma-Al2O3 yog dav siv los ua cov kab hlau txuas mus rau vim qhov kev hloov ntawm nws cov qauv pore thiab qhov chaw acidity. Thaum γ- Al2O3 siv raws li tus cab kuj, dhau li ntawm yuav muaj teebmeem rau disperse thiab stabilize lub Cheebtsam, tseem tuaj yeem muab acid alkali cov chaw, synergistic cov tshuaj tiv thaiv nrog cov catalytic nquag cheebtsam. Cov txheej txheem pore thiab deg cov khoom ntawm catalyst nyob ntawm seb muaj γ-Al2O3 cov cab kuj, cov txheej txheem ua rau siab siab yuav pom muaj cov tshuaj tiv thaiv tshwj xeeb los ntawm kev tswj cov khoom ntawm gamma alumina carrier.
Gamma activated alumina feem ntau yog ua los ntawm nws cov pseudo-boehmite precursor ntawm 400 ~ 600 ℃ siab dej dehydration, yog li ntawm cov khoom siv physicochemical feem ntau yog txiav txim los ntawm nws cov pseudo-boehmite precursor, tab sis muaj ntau txoj hau kev ua pseudo-boehmite, thiab ntau qhov chaw ntawm pseudo-boehmite ua rau ntau hom gamma - Al2O3. Txawm li cas los, cov catalysts uas muaj kev tshwj xeeb rau alumina carrier, tsuas yog khi rau kev tswj ntawm cov pseudo-boehmite precursor nyuaj, yuav tsum tau coj mus rau prophase npaj thiab tom qab ua tiav kev sib txuas los kho cov khoom ntawm alumina kom tau raws li cov kev cai sib txawv. Thaum cov kub siab tshaj 1000 ℃, siv alumina tshwm sim tom qab theem hloov: γ → θ → α-Al2O3, ntawm lawv γ, δ, θ yog nyhav ze packing, qhov txawv tsuas yog nyob rau hauv kev faib ntawm cov txhuas ions hauv tetrahedral thiab octahedral, yog li cov theem hloov no tsis ua ntau ntau ntawm cov qauv. Oxygen ions nyob rau hauv theem alpha yog hexagonal ze cov pob, aluminium oxide hais yog grave reunion, meej deg cheeb tsam declined considerably.
Tiv tauj peb!
ADD: No.16, Hi-Tech Industrial Park, Zone Zone, Zibo Zos, Nroog Shandong 255000, PRChina
TEL: + 86-533-3037068
FAX: + 86-533-2925976
TXAWB: +8613518630890
E-MAIL: international@xradsorbent.com
Suav lub website: http://www.bairuichem.com/
Lub tuam txhab txuas rau lub website: http: //www.aluminaadsorbents.com/ http: //xradsorbent.com/
Cim npe nrov: gamma activated alumina, lwm tus neeg, manufacturers, khoom, khoom, nqe, lub neej, siv, hmoov, hom, ntau lawm, tsuaj, yuav, MSDS, HS code