Feem ntau cov hydrogenation catalyst rau alumina catalyst carrier thawj alumina nrog lub zog siab ignition, lub zog siab melting, uas qhia tau hais tias nws yog ib hom refractory oxide, xws li ua rau cov khoom me me catalyst sib cais los ntawm ib leeg, yog li kom tsis txhob muaj catalyst carrier aggregation lossis sintering thib ob, alumina hauv theem muaj nyob rau hauv ntau qhov kub thiab txias, thiab ua rau nws cov qauv sab hauv thaum kub siab thaum rearrangement ntawm lub siv lead ua ruaj khov ntawm qhov kub siab, hnav-tiv taus, zoo cua sov hloov pauv kev ua tau zoo ntxiv rau, muaj alumina nto acidic thiab alkaline center zoo li acid reaction hauv alkaline medium, thiab uas tuaj yeem ua haujlwm zoo li alkali hauv acidic medium Rau alumina catalyst carrier, yog li ntawd, muaj kev txhawb nqa thiab kev faib tawm ntawm cov hlau muaj nqis dilute nyhuv thiab ua rau kev faib tawm ntawm cov hlau nto hauv metastable me me noob loj ruaj khov, tsis yooj yim rau kev sib sau ua ke thiab sintering tseem ceeb dua li cov txhuas oxide ntawm alumina, txhuas rau lub rooj thiab mobile, tsim oxides thiab tawm hauv qhov, nrog cov khoom tsis muaj dab tsi siab thiab ntau qhov chaw cia, tuaj yeem kho cov khoom catalytic nws qhov chaw sab hauv, thiab yog conducive rau kis mus rau qhov chaw ua haujlwm ntawm reactants thiab cov khoom tawm hauv qhov chaw ua haujlwm tag nrho cov no qhia tau hais tias alumina muaj kev ua tau zoo heev ntawm catalyst tus neeg nqa khoom.
Lub sijhawm tshaj tawm: Plaub Hlis-26-2020