Cerium Hydroxide

Cov Khoom Cerium Hydroxide

Cov Lus Qhia Txog Kev Siv Cerium Hydroxide Uas Muaj Peev Xwm Siab

Qhov Loj ntawm Particle (D50) Raws li Qhov Yuav Tsum Tau Ua

Cerium Hydroxide siv rau dab tsi?

Ua ib tug kws tshaj lij hauv kev tshawb fawb txog cov hlau sib xyaw, kuv yuav muab cov khoom siv tshuaj lom neeg ntawm cerium hydroxide (Ce(OH)₄) los piav qhia txog nws cov ntawv thov tseem ceeb hauv cov thev naus laus zis siab thiab kev lag luam, thiab tshuaj xyuas nws cov txheej txheem ua haujlwm tob: 

1. Kev ua kom roj av zoo: Fluidized catalytic cracking (FCC) catalyst core additive
Lub luag haujlwm tseem ceeb: Ua tus hloov kho ntau yam ntawm cov molecular sieves (xws li Y-hom zeolite) hauv FCC catalysts.
Txoj kev ua haujlwm:
Cov khoom siv cua sov: Ce(OH)₄ raug hloov mus ua CeO₂ los ntawm kev ci, thiab khi lub zeolite framework aluminium los ntawm "oxygen vacancy buffer effect", tiv thaiv kev puas tsuaj ntawm cov qauv hauv qab kev rov ua dua tshiab kub (> 700 ℃).
Tus neeg ua kom cov hlau tsis nkag mus rau hauv lub cev: Ntes cov hlau hnyav xws li Ni thiab V hauv cov roj av nyoos (ua rau CeNiO₃/CeV₂O₇), tiv thaiv nws cov tshuaj catalytic dehydrogenation, thiab txo cov coke/hydrogen yield.
Tus neeg sawv cev hloov pauv sulfur: Ce³⁺/Ce⁴⁺ redox voj voog txhawb kev hloov pauv ntawm SOₓ mus rau hauv cov sulfate rov ua dua tshiab, txo cov pa roj flue sulfur emissions (SOₓ → Ce₂(SO₄)₃).
Tus nqi lag luam: Ua kom lub neej catalyst ntev dua 15-30%, ua kom cov roj av muaj octane ntau ntxiv, thiab txo kev siv zog rov ua dua tshiab.

2. Kev ntxuav cov pa tawm hauv tsheb: qhov tseem ceeb ntawm cov tshuaj catalyst peb txoj kev (TWC)
Lub luag haujlwm tseem ceeb: Nano CeO₂-ZrO₂ cov kua khov (CZO) uas tsim los ntawm kev rhuav tshem thermal yog cov khoom siv cia oxygen (OSC) ntawm TWC.
Txoj kev ua haujlwm:
Dynamic oxygen buffering: Ce⁴⁺ + 2e⁻ ⇌ Ce³⁺ + ½O₂, tso tawm/nqus cov pa oxygen sai sai hauv qab cov xwm txheej lean/nplua nuj, thiab nthuav dav qhov rais piv ntawm huab cua-roj (λ≈1).
Tus neeg nqa cov hlau muaj nqis uas tawg ua tej daim me me: CeO₂ thaj chaw tshwj xeeb siab ua rau Pt/Pd/Rh tawg ua tej daim me me thiab ua rau CO/HC oxidation thiab NOₓ txo qis zog.
Kev ruaj khov thermal zoo dua: Zr⁴⁺ doping inhibits CeO₂ sintering (>1000℃) thiab tswj OSC lub neej.
Cov ntsuas kev ua tau zoo: CZO suav txog 20-30% ntawm TWC niaj hnub, ua tiav >99% tus nqi hloov pauv pa phem.

3. Kev ua kom pom tseeb ntawm kev ua kom pom tseeb: cov hmoov txhuam hniav zoo tshaj plaws
Cov txheej txheem tseem ceeb: Ce(OH)₄ raug calcined thiab graded los npaj cov hmoov txhuam CeO₂ uas muaj zog heev.
Txoj kev ua haujlwm:
Kev sib xyaw ua ke ntawm tshuaj lom neeg thiab tshuab: CeO₂ cuam tshuam nrog SiO₂ ntawm qhov chaw iav los tsim cov Ce-O-Si sib txuas uas yooj yim tshem tawm, txo kev puas tsuaj rau tshuab.
Kev txiav Nanoscale: Cov khoom me me CeO₂ uas siv lead ua ib leeg/spherical (qhov loj me ntawm 50-500nm) ua tiav qhov roughness ntawm qhov chaw sub-angstrom (Ra<0.5nm).
Cov cheeb tsam thov:
Cov khoom siv semiconductor: Silicon wafers, sapphire substrate, CMP polishing
Cov vaj huam sib luag tso saib: LCD / OLED iav substrates, tiv thaiv npog
Cov khoom siv kho qhov muag: Cov tsom iav koob yees duab, cov tsom iav tshuab photolithography

4. Cov iav tshwj xeeb thiab cov enamel: cov khoom siv hloov kho kom haum
Cov Haujlwm Tseem Ceeb:
Tus neeg sawv cev txiav UV: Ce⁴⁺ nqus tau zoo heev hauv thaj chaw ultraviolet (200-350nm) los tiv thaiv cov ntsiab lus (iav tshuaj, ntim khoom kos duab).
Tus neeg sawv cev ntxoov ntxoo/xim: Ua haujlwm nrog TiO₂ los tsim cov nyhuv mis nyuj (enamel); tswj qhov piv ntawm Ce³⁺/Ce⁴⁺ los kho lub suab daj (Ce³⁺: kev nqus lub teeb xiav; Ce⁴⁺: kev nqus lub teeb daj).
Cov iav uas tiv taus hluav taws xob: Ce³⁺ ntes cov khub electron-hole uas tsim los ntawm X-rays thiab tiv thaiv cov iav tsis hloov xim (lub qhov rais saib xyuas lub chaw tsim hluav taws xob nuclear).
Cov txiaj ntsig ntawm kev siv tshuab: Hloov cov tshuaj ua kom huv As₂O₃ ib txwm muaj thiab ua raws li cov cai ib puag ncig.

5. Kev lag luam catalytic: Styrene ntau lawm enhancer
Cov txheej txheem thov: Ethylbenzene dehydrogenation los tsim styrene (Fe₂O₃-K₂O-Cr₂O₃ catalyst system).
Txoj kev ua haujlwm:
Cov tshuaj tiv thaiv kev tsiv teb tsaws chaw ntawm cov poov tshuaj: CeO₂ kho cov ions K⁺ kom tiv thaiv kev poob ntawm cov khoom xyaw nquag ntawm qhov kub siab (600 ° C).
Redox promoter: Ce³⁺/Ce⁴⁺ lub voj voog ua kom cov catalyst rov ua dua tshiab thiab tiv thaiv cov pa roj carbon deposition (C + 4Ce⁴⁺ → CO₂ + 4Ce³⁺).
Cov khoom ruaj khov: Txhim kho qhov kev kam rau siab hloov pauv theem Fe₂O₃ thiab ua kom lub neej catalyst ntev dua 2-3 zaug.
Cov txiaj ntsig kev lag luam: Txhim kho kev xaiv styrene mus rau 92-95% thiab txo cov pa siv los ntawm 30%.

6. Kev tiv thaiv xeb hlau: Kev tiv thaiv xeb ntse
Txoj kev tshiab:
Kev tsim cov zaj duab xis kho tus kheej: Ce³⁺ raug oxidized rau Ce(OH)₃/CeO₂ zaj duab xis tso tawm (tuab 50-200nm) hauv thaj chaw cathode los thaiv cov pa oxygen diffusion.
Kev tswj hwm pH hauv zos: OH⁻ tso tawm cov khoom siv xeb acidic (xws li Fe²⁺ → FeOOH).
Anodic passivation: Tsim ib txheej Ce-oxide/hydroxide passivation rau ntawm qhov chaw ntawm Al/Zn/Mg alloy.
Cov xwm txheej siv: Aviation aluminium alloy (AA2024), shipbuilding steel, automotive galvanized sheet coating additives.

7. Kev kho ib puag ncig: Tus neeg sawv cev kho dej ua haujlwm zoo
Daim ntawv thov ntau yam:
Tus neeg sawv cev tshem tawm phosphorus: Ce³⁺ thiab PO₄³⁻ tsim cov CePO₄ uas tsis yaj (Ksp=10⁻²³), tshem tawm phosphorus tob tob mus rau <0.1mg/L.
Tus neeg sawv cev tshem tawm Fluorine: Tsim CeF₃ colloid (Ksp = 10¹⁶), nrog lub peev xwm nqus tau ntawm 80mg F⁻/g.
Kev kho cov nuclide radioactive: Muaj peev xwm sib koom tes zoo rau UO₂²⁺, TcO₄⁻, thiab lwm yam. (Kd>10⁴ mL/g).
Cov txiaj ntsig ntsuab: Tsis muaj cov khoom lom, thiab cov sludge tsuas yog 1/3 ntawm cov ntsev txhuas / ntsev hlau.

8. Cov khoom siv ua ntej ntawm cov ntsev cerium siab kawg
Cov khoom purity siab ntawm cov khoom derivative: