Kev txhawb nqa Catalyst

Tus neeg nqa khoom catalyst yog ib feem tshwj xeeb ntawm cov khoom siv catalyst, dispersant, binder, negative carrier ntawm cov khoom siv nquag ntawm catalyst, thiab qee zaum ACTS ua co-catalyst lossis co-catalyst. Catalyst carrier, tseem hu ua kev txhawb nqa, yog ib qho ntawm cov khoom ntawm cov catalyst txhawb nqa. Feem ntau, nws yog cov khoom siv porous nrog qee qhov chaw tshwj xeeb, thiab cov khoom siv nquag ntawm catalyst feem ntau txuas rau nws. Tus neeg nqa khoom feem ntau yog siv los txhawb cov khoom siv nquag, yog li ntawd catalyst muaj cov yam ntxwv tshwj xeeb, thaum tus neeg nqa khoom nws tus kheej feem ntau tsis muaj kev ua haujlwm catalytic.

Cov kev xav tau ntawm kev txhawb nqa Catalyst

1, tuaj yeem dilute qhov ceev ntawm cov khoom xyaw nquag, tshwj xeeb tshaj yog cov hlau muaj nqis

2, tuaj yeem npaj rau hauv ib qho duab

3. Kev sib xyaw ua ke ntawm cov khoom sib xyaw ua ke tuaj yeem tiv thaiv tau qee yam

4, tuaj yeem tiv taus tshuaj lom

5. Nws tuaj yeem muaj kev sib cuam tshuam nrog cov khoom siv nquag thiab cov catalyst tseem ceeb.

Cov nyhuv ntawm tus neeg nqa khoom catalyst

1, txo cov nqi catalyst

2, txhim kho lub zog kho tshuab ntawm cov catalyst

3. Txhim kho qhov ruaj khov ntawm cov tshuaj catalyst

4, ntxiv cov catalyst kev ua ub no thiab kev xaiv

5. Ntev lub neej ntawm cov tshuaj catalyst

Muaj ntau lub tuam txhab thauj khoom tseem ceeb tau qhia tawm

1. Activated alumina: feem ntau siv cov cab kuj rau cov catalysts kev lag luam. Tus nqi qis, tiv taus cua sov siab, kev sib raug zoo ntawm cov khoom nquag.

2. Silica gel: cov tshuaj lom neeg muaj pes tsawg leeg yog SiO2. Feem ntau ua los ntawm sodium silicate (na 2 si 3) acid. Silicate acid tau tsim tom qab cov nyhuv ntawm sodium silicate thiab acid. Silicic acid polymerization, condensation, cov qauv ntawm cov polymer tsis paub meej.

SiO2 yog ib qho khoom siv dav dav, tab sis nws daim ntawv thov kev lag luam tsawg dua Al2O3, uas yog vim muaj teeb meem hauv kev npaj, tsis muaj zog sib raug zoo nrog cov khoom xyaw nquag, yooj yim sintering nrog cov pa dej thiab lwm yam tsis zoo.

3. Diatomite: SiO2 ntuj. Nws muaj ob peb lub hlau oxides thiab cov organic, thiab nws cov qauv pore thiab qhov chaw tshwj xeeb hloov pauv nrog keeb kwm. Kev kho acid yuav tsum tau siv ua ntej siv. Ib qho yog los txhim kho cov ntsiab lus ntawm SiO2 thiab nce qhov chaw tshwj xeeb, qhov ntim pore tshwj xeeb thiab lub vojvoog pore thawj zaug. Qhov thib ob yog los txhim kho kev ruaj khov thermal, tom qab kev kho acid, tuaj yeem ua rau qhov chaw tshwj xeeb ntxiv. Diatomite feem ntau yog siv los npaj cov catalysts txaj ruaj khov.

4, cov pa roj carbon ua kom lub zog: cov khoom xyaw tseem ceeb yog C, muaj ob peb H, O, N, S thiab tshauv, thiab lwm yam. Cov pa roj carbon ua kom lub zog muaj cov qauv zeb tsis sib xws, muaj cov pab pawg carbonyl, pab pawg quinone, pab pawg hydroxyl thiab pab pawg carboxyl ntawm qhov chaw. Cov pa roj carbon ua kom lub zog yog tus yam ntxwv los ntawm cov qhov tsim thiab thaj chaw loj, thermal stability thiab siab.

5. TiO2: nws muaj peb lub duab siv lead ua: anatase, phaj titanium thiab rutile. Daim ntawv titanium ore nyuaj rau synthesize vim tsis ruaj khov; Anatase yog tsim ntawm qhov kub qis dua nrog qhov ceev ntawm 3.84 thiab thaj chaw tshwj xeeb loj dua. Thaum cua sov ntawm 600 ~ 1000 ° C, anatase dhau los ua rutile, uas muaj qhov ceev ntawm 4.22 thiab thaj chaw tshwj xeeb me me.

6. Silicon carbide: lub ntsiab lus yaj ntawm carbide ceramics yog siab dua 2000 ° C, nrog rau kev ua kom sov siab, siab hardness, muaj zog tiv taus cua sov thiab cuam tshuam tsis kam, tab sis nws tsuas yog oxidized hauv huab cua oxygen. Yog li SiC feem ntau siv ua tus cab kuj ntawm catalyst hauv qhov chaw kub siab.

7. Lub tshuab nqus molecular: nws yog ib qho crystalline silicate lossis silicoaluminate, ib qho pore thiab cavity system uas muaj silico-oxygen tetrahedron lossis alumino-aluminum tetrahedron txuas nrog cov pa oxygen bridge bonds. Nws muaj thermal stability siab, dej thermal stability thiab acid thiab alkali tsis kam.