Kev siv cov alumina carrier

① Load catalytically active Cheebtsam. Alumina nrog thaj chaw me me (los yog cov khoom siv tsuas yog me me ntawm cov pores ntxhib) feem ntau yog siv los txhawb cov khoom siv hluav taws xob nrog cov haujlwm tshwj xeeb. Kev siv cov khoom siv no tuaj yeem tshem tawm cov nyhuv diffusion hauv lub qhov hws thiab txo qis oxidation sab sib sib zog nqus hauv cov txheej txheem tsom rau kev xaiv oxidation. Piv txwv li, cov nyiaj catalyst siv nyob rau hauv oxidation ntawm ethylene rau ethylene oxide siv -alumina ua tus cab kuj. Alumina nrog thaj chaw loj tshwj xeeb muaj qhov zoo- tsim cov qauv pore, uas tuaj yeem cuam tshuam cov khoom siv catalyst active Cheebtsam rau hauv cov khoom, thiab tiv thaiv cov active tivthaiv particles los ntawm sintering thiab loj hlob thaum siv nrog kev pab los ntawm lub barrier muaj nuj nqi ntawm cov cab kuj. Nws yog siv dav siv Alumina kev txhawb nqa siv. Piv txwv li, cov hlau zoo xws li palladium, platinum, rhodium, thiab lwm yam yog dispersed ntawm alumina carrier los ua hydrogenation catalyst, uas tuaj yeem txhim kho qhov kev siv ntawm cov hlau muaj txiaj ntsig.
② Lub acidity ntawm alumina nto thiab cov khoom siv thauj khoom ua haujlwm ua haujlwm ua haujlwm ob lub catalyst. Piv txwv li, lub platinum-alumina catalyst siv nyob rau hauv platinum hloov kho, nyob rau hauv uas alumina ua hauj lwm raws li ob qho tag nrho cov cab kuj thiab ib tug ntawm cov active Cheebtsam ntawm cov catalyst. Qee zaum, muaj kev sib cuam tshuam ntawm kev txhawb nqa alumina thiab cov hlau tawg heev (xws li platinum), uas tuaj yeem cuam tshuam cov khoom catalytic ntawm cov hlau.