Hauv catalytic cov tshuaj tiv thaiv, tusKev pab txhawb nqa catalysttsis yog tsuas yog pab kom lub zog impobilize tab sis kuj cuam tshuam cov dispersion, thiab cov tshuaj tiv thaiv zoo li ib puag ncig, thiab kho tau cov khoom lag luam saum npoo av {}}
Cov ntsiab lus zoo ntawm alumina raws li kev txhawb nqa catalyst
{{01. Cov chaw tshwj xeeb thaj tsam thiab cov qauv sib tw
• Cov Txheej Txheem Tshaj Tawm ntawm cov khoom siv: -al₂o₃ nrog lub thaj chaw siab tshwj xeeb tuaj yeem cuam tshuam nrog cov cuab yeej siv hlau zoo thiab txhim kho catalytic efficiency.
• Cov qauv siv Pore: Qhov kev faib khoom loj tuaj yeem hloov kho los ntawm cov kev sib txawv ntawm cov kab ke los txhawm rau txhim kho cov kev sib txawv, thiab} hydrogenation) .
2. Adjustable Nto Acidity thiab Yooj Yim
• Lewis acid chaw (al³⁺): tuaj yeem thauj tog rau nkoj hlau nquag plias chaw, txhim kho kev sib txuas lus hlau-kev sib txuas lus catalytic.
• Brønsted acid chaw (-Oh): Haum rau cov kua qaub-catalenyzed xws li roj av tawg thiab isomerization .
• Acidity thiab cov ntsiab lus yooj yim:
o Ua kom zoo nkauj acidity: qhia txog ntawm f⁻, clr,, lossis so₄²⁻ (e {{}} {1} .
o Txo cov acidity: Chaw thau khoom ntawm cov xim theem pib xws li k₂o lossis Mgo (E {{}} {{.
{{0 {}}} zoo heev thermal ruaj khov thiab tshuab muaj zog
• Cov teeb meem kub tiv thaiv kub: -al₂o₃ tuaj yeem tswj cov qauv kev ruaj ntseg hauv qab 800 degree, thiab nws qhov kev kub ntxhov ntxiv tuaj yeem txhim kho txuas ntxiv los ntawm LA, CE, thiab lwm yam}
• Muaj zog txhua yam: tsim nyog rau muaj cov kev siv tshuaj tiv thaiv xws li txaj thiab txaj pw, tiv thaiv mechanical hnav thaum kev hloov pauv .
4.} Cov tshuaj ruaj khov
• Cov khoom pov thawj kev ntsuas tshuaj lom zem nyob rau hauv ob qho oxidizing thiab txo cov cua nab kuab, ua rau nws tsis tshua muaj kev phiv nrog cov khoom siv lossis cov khoom .
• Kev sib xyaw zoo nrog cov hlau ua haujlwm: tuaj yeem tsim cov tshuab catalytic .
5. Tus nqi qis thiab kev loj hlob
• Alumina raw cov khoom siv tau npaj tau yooj yim, thiab cov txheej txheem kev npaj ua tiav, ua rau lawv haum rau loj-teev ntau.
Kev Ua Ntawv Thov Cov Qauv
• Petrochemicals:
o Hydrodesulfurization
o catalytic cracking
• ib puag ncig mandalysis:
o Kev ua kom huv si
o Voc oxidation
• Tshuaj nplua:
o aldehyde hydrogenation
Cov ntsiab lus tseem ceeb ntawm alumina raws li aKev pab txhawb nqa catalystdag nyob rau hauv nws cov sib xyaw ua ke ntawm thaj chaw siab thaj chaw, kho cov acidity thiab kev ua tau zoo tshaj plaws {