Tam sim no, kev siv pseudo-boehmite tseem ceeb yog ua cov khoom siv raw rau kev npaj alumina thiab cov nplaum rau cov catalyst lossis catalyst carrier uas nyuaj rau tsim. Alumina uas tau npaj los ntawm kev ci pseudo-boehmite muaj thaj chaw tshwj xeeb siab thiab siv dav ua catalyst thiab catalyst carrier hauv kev lag luam petrochemical.
1. siv rau cov khoom siv raw nanometer alumina
Ib qho tseem ceeb ntawm kev siv pseudo-boehmite yog cov khoom siv raw ntawm aluminium oxide. Raws li cov yam ntxwv ntawm thaj chaw loj tshwj xeeb, kev ua haujlwm siab thiab kev nqus tau zoo ntawm cov khoom siv raw, nws tau siv los ua cov khoom siv ceramics kub siab xws li aluminium nitride ceramics. Tsis tas li ntawd, nano-Al2O3 yog qhov tshwj xeeb tshaj yog rau kev siv tshuaj lom neeg kho tshuab polishing (CMP), los ntawm nano-Al2O3 ua cov khoom sib tsoo tsim los ntawm CMP slurry tuaj yeem siv rau hauv txheej nruab nrab ntawm IC cov txheej txheem tsim khoom raws li cov ntaub ntawv semiconductor wiring thiab cov ntaub ntawv zaj duab xis xws li tungsten, txhuas, tooj liab flattening, thiab advanced optical iav, quartz siv lead ua thiab ntau yam gems polishing.
Daim Duab -Al2O3 siv tau rau cov khoom siv tshuaj lom neeg polishing abrasive
2. Rau cov tshuaj hydrogenation catalyst
Yuav kom ua tau raws li qhov xav tau ntawm kev siv cov peev txheej roj av thiab cov roj huv, cov thev naus laus zis hydrogenated tau siv dav, hydrogenation catalyst yog lub hauv paus ntawm hydrogenation technology, siv rau hydrogenation catalyst gamma alumina carrier feem ntau yog tsim los ntawm quasi nyias diaspore los ntawm kev ci dehydration, muaj thaj chaw tshwj xeeb, nkag thiab hloov kho qhov faib tawm, qhov chaw muaj cov kua qaub sib txawv. Zoo dua lub zog kho tshuab thiab thermal stability, ntxiv rau tus nqi qis.
Cov catalysts duab yog qhov tseem ceeb rau kev tsim cov khoom siv roj av
Hauv kev lag luam roj niaj hnub thiab tshuaj lom neeg, ntau dua 90% ntawm cov txheej txheem tshuaj lom neeg yog ua tiav los ntawm cov txheej txheem catalytic, yog li catalyst tau dhau los ua qhov tseem ceeb rau kev ua kom tiav tshiab thiab cov txheej txheem tshuaj, kev tsim khoom tshiab. Hauv kev lag luam roj refining, cov catalysts khov kho feem ntau siv, uas yog tsim los ntawm cov cab kuj thiab cov khoom siv nquag. Cov cab kuj yog ib qho khoom tshwj xeeb ntawm cov catalyst khov kho, uas tuaj yeem ua rau thaj chaw tshwj xeeb, txhim kho kev tiv thaiv cua sov thiab lub zog kho tshuab. Cov catalyst SIV ntau hom cab kuj, xws li: alumina, molecular sieve, silica gel, silica gel, activated carbon thiab diatomaceous earth. Txawm li cas los xij, qhov ntau ntawm alumina cab kuj suav rau ntau dua ib nrab ntawm tag nrho cov nyiaj ntawm cov catalyst cab kuj. Catalytic cracking (FCC) catalyst yog lub hauv paus ntawm cov txheej txheem catalytic cracking. Raws li lub ntiaj teb cov roj nyoos hnyav thiab qis dua, hauv catalytic cracking raw khoom sib xyaw cov roj hnyav, cov roj seem tau dhau los ua txoj hauv kev siv dav dav, yog li xav tau cov roj catalytic cracking (FCC) catalyst yuav tsum muaj cov roj hnyav molecular diffusion ntawm qhov loj, thiab qhov loj hauv nruab nrab yuav tsum muaj cov kua qaub tsim nyog, txhawm rau txhim kho catalyst cracking peev xwm ntawm Cov tshuaj macromolecular hauv cov ntaub ntawv raw. Cov alumina nquag siv feem ntau los txhim kho cov catalyst matrix. Lub qhov loj ntawm cov qhov yog qhov zoo rau kev sib kis ntawm cov tshuaj macromolecular rau hauv cov khoom catalyst, thaum thaj chaw tshwj xeeb siab yog qhov zoo rau kev sib kis ntawm cov hlau nquag, yog li txhim kho kev ua haujlwm ntawm cov tshuaj catalyst.
3. Siv ua nplaum
Tus neeg nqa khoom siv diaspore nyias siv los ua tus neeg sawv cev sib txuas tsis yog tsuas yog pab rau kev molding xwb, tab sis kuj tseem yuav cuam tshuam rau kev ua haujlwm ntawm catalyst, cov kws tshawb fawb hauv cov roj flue denitration xaiv catalytic txo Ce - Mn / TiO2 catalyst hauv cov txheej txheem ntawm kev koom nrog nyias diaspore ua tus neeg sawv cev sib txuas, pom tias tsis tsuas yog txhim kho lub zog kho tshuab ntawm cov catalysts, kuj txhim kho cov denitration surfactant xaiv catalyst.
4. npaj ib txheej -Al2O3
Cov dej num ntawm kev txheej ib txheej ntawm tus neeg nqa khoom nto txheej yog kom nce qhov chaw tshwj xeeb ntawm txoj kev siv feem ntau, gamma alumina yog ib qho ntawm cov khoom siv txheej feem ntau siv, nrog thaj chaw tshwj xeeb siab, pab rau cov khoom siv nquag hauv kev faib tawm zoo hauv cov txheej txheem ntawm impregnation, kev npaj ntawm feem ntau siv gamma alumina txheej rau AlOOH precursor sol, alumina sol kom nyias diaspore ua cov khoom siv raw, kev npaj, los ntawm kev siv txoj kev ntawm cov txheej txheem acid peptization yooj yim los tswj, tuaj yeem siv rau kev tsim khoom lag luam.
Lub sijhawm tshaj tawm: Plaub Hlis-22-2020