Kev them nyiaj yug catalyst yog ib feem tshwj xeeb ntawm cov khoom catalyst. Nws yog cov dispersant, binder thiab kev txhawb nqa ntawm lub active Cheebtsam ntawm lub catalyst, thiab tej zaum kuj plays lub luag hauj lwm ntawm Co catalyst los yog cocatalyst. Kev them nyiaj yug catalyst, tseem hu ua kev txhawb nqa, yog ib qho ntawm cov khoom txhawb nqa catalyst. Nws feem ntau yog cov khoom ntxeem tau nrog qee qhov chaw tshwj xeeb. Lub active Cheebtsam ntawm lub catalyst yog feem ntau txuas rau nws. Cov cab kuj yog siv los txhawb cov active Cheebtsam thiab ua rau cov catalyst muaj cov yam ntxwv ntawm lub cev. Txawm li cas los xij, tus neeg nqa khoom nws tus kheej feem ntau tsis muaj cov haujlwm catalytic.
Cov kev xav tau rau kev txhawb nqa catalyst
1. Nws tuaj yeem dilute qhov ntom ntawm cov khoom siv, tshwj xeeb tshaj yog cov hlau muaj txiaj ntsig
2. Thiab tuaj yeem npaj rau hauv ib qho duab
3. Sintering ntawm cov khoom nquag tuaj yeem tiv thaiv tau qee qhov
4. tuaj yeem tiv taus tshuaj lom
5. Nws tuaj yeem cuam tshuam nrog cov khoom siv ua haujlwm thiab ua haujlwm ua ke nrog lub ntsiab catalyst.
Cov nyhuv ntawm kev txhawb nqa catalyst
1. Txo cov nqi catalyst
2. Txhim kho lub zog txhua yam ntawm catalyst
3. Txhim kho thermal stability ntawm catalysts
4. Kev ua si thiab kev xaiv ntawm cov catalyst ntxiv
5. Txuas lub neej catalyst
Taw qhia rau ntau tus neeg nqa khoom tseem ceeb
1. Activated alumina: cov khoom siv dav siv tshaj plaws rau kev lag luam catalysts. Nws yog pheej yig, muaj kev kub ntxhov, thiab muaj kev sib raug zoo rau cov khoom siv.
2. Silica gel: cov tshuaj muaj pes tsawg leeg yog SiO2. Nws feem ntau yog npaj los ntawm acidifying dej iav (Na2SiO3). Silicate yog tsim tom qab sodium silicate reacts nrog acid; Silicic acid polymerizes thiab condenses los tsim cov polymers nrog cov qauv tsis meej.
SiO2 yog cov neeg nqa khoom siv dav, tab sis nws daim ntawv thov kev lag luam tsawg dua li ntawm Al2O3, uas yog vim muaj qhov tsis xws li kev npaj nyuaj, tsis muaj zog affinity nrog active Cheebtsam, thiab yooj yim sintering nyob rau hauv lub coexistence ntawm dej vapor.
3. Molecular sieve: nws yog crystalline silicate los yog aluminosilicate, uas yog ib tug pore thiab kab noj hniav uas muaj li ntawm silicon oxygen tetrahedron los yog txhuas oxygen tetrahedron txuas nrog oxygen choj daim ntawv cog lus. Nws muaj thermal stability, hydrothermal stability thiab acid thiab alkali tsis kam
Post lub sij hawm: Jun-01-2022
