Kev txhawb nqa Catalyst yog ib feem tshwj xeeb ntawm cov khoom siv catalyst khov kho. Nws yog tus dispersant, binder thiab kev txhawb nqa ntawm cov khoom siv nquag ntawm cov catalyst, thiab qee zaum ua lub luag haujlwm ntawm Co catalyst lossis cocatalyst. Kev txhawb nqa Catalyst, tseem hu ua kev txhawb nqa, yog ib qho ntawm cov khoom siv ntawm cov catalyst txhawb nqa. Nws feem ntau yog cov khoom siv porous nrog qee qhov chaw tshwj xeeb. Cov khoom siv nquag ntawm cov catalyst feem ntau txuas rau nws. Tus cab kuj feem ntau yog siv los txhawb cov khoom siv nquag thiab ua rau cov catalyst muaj cov khoom siv lub cev tshwj xeeb. Txawm li cas los xij, tus cab kuj nws tus kheej feem ntau tsis muaj kev ua haujlwm catalytic.
Cov kev cai rau kev txhawb nqa catalyst
1. Nws tuaj yeem dilute qhov ceev ntawm cov khoom xyaw nquag, tshwj xeeb tshaj yog cov hlau muaj nqis
2. Thiab tuaj yeem npaj ua ib yam duab
3. Kev sib xyaw ua ke ntawm cov khoom ua haujlwm tuaj yeem tiv thaiv tau qee yam
4. Muaj peev xwm tiv taus tshuaj lom
5. Nws tuaj yeem cuam tshuam nrog cov khoom xyaw nquag thiab ua haujlwm ua ke nrog cov catalyst tseem ceeb.
Cov nyhuv ntawm kev txhawb nqa catalyst
1. Txo cov nqi catalyst
2. Txhim kho lub zog kho tshuab ntawm catalyst
3. Txhim kho qhov thermal stability ntawm cov catalysts
4. Kev ua ub no thiab kev xaiv ntawm cov catalyst ntxiv
5. Ntev lub neej ntawm cov tshuaj catalyst
Kev Taw Qhia rau ntau tus neeg nqa khoom tseem ceeb
1. Activated alumina: tus neeg nqa khoom siv dav tshaj plaws rau cov catalysts hauv kev lag luam. Nws pheej yig, tiv taus cua sov siab, thiab muaj kev sib raug zoo rau cov khoom xyaw nquag.
2. Silica gel: cov tshuaj lom neeg muaj pes tsawg leeg yog SiO2. Feem ntau nws yog npaj los ntawm kev ua kom dej iav (Na2SiO3) acidifying. Silicate yog tsim tom qab sodium silicate reacts nrog acid; Silicic acid polymerizes thiab condenses los tsim cov polymers nrog cov qauv tsis paub meej.
SiO2 yog ib qho khoom siv dav dav, tab sis nws daim ntawv thov kev lag luam tsawg dua li Al2O3, uas yog vim muaj qhov tsis zoo xws li kev npaj nyuaj, kev sib raug zoo tsis muaj zog nrog cov khoom xyaw nquag, thiab yooj yim sintering nyob rau hauv kev sib koom ua ke ntawm cov dej pa.
3. Lub tshuab nqus molecular: nws yog ib qho crystalline silicate lossis aluminosilicate, uas yog lub qhov thiab qhov cavity system uas muaj silicon oxygen tetrahedron lossis aluminium oxygen tetrahedron txuas nrog oxygen bridge bond. Nws muaj kev ruaj khov thermal, hydrothermal stability thiab acid thiab alkali tsis kam.
Lub sijhawm tshaj tawm: Lub Rau Hli-01-2022
