Tus catalyst yuav poob nws cov kev ua haujlwm sai lossis maj mam vim muaj ntau yam nyob rau thaum siv. Cov laj thawj kev tawm catalyst deactivation yog cov. Muaj peev xwm txheeb lub ntsiab rau hauv qab no:
1. Ua tsis ruaj khov mus tas li
Cov nquag ua haujlwm ntawm cov catalyst poob lawv cov kev ua vim qhov kev nqis tes (lom) ntawm qee cov khoom txawv teb chaws, feem ntau ua tsis tiav. Feem ntau ntawm cov khoom siv txawv teb chaws dhau los ntawm cov tshuaj lom neeg cov tshuaj tiv thaiv lossis kev sib pauv ntawm ion nrog cov nquag ua haujlwm ntawm cov kab hluav taws xob ua rau cov nquag hloov pauv. Xws li cov kua roj acid acid yog nruab nrab los ntawm alkalis, cov nplaim hlau uas muaj nqi yog cov tshuaj lom los ntawm sulfides lossis nitrides. Qhov kev ua kom tsis zoo ntawm catalyst lom feem ntau yog ua los ntawm kev ua si poob qis. Cov nquag ua haujlwm yog hnav lossis sublimated thaum siv, ua rau poob thiab ua rau lub neej tsis ruaj khov. Xws li kev tsis muaj peev xwm feem ntau nyuaj rau kev rov qab zoo
2. Cov tshuaj ua kom nquag pluav yog them thiab maj mam ua kom tsis muaj zog, uas yog qhov tsis ruaj khov. Piv txwv, cov pa roj carbon monoxide tsim tawm thaum cov txheej txheem cov tshuaj tiv thaiv npog cov feem ua haujlwm lossis thaiv qhov pores ntawm cov catalyst, ua rau cov reactants tsis tuaj yeem tiv tauj rau cov khoom siv tsis zoo. Cov npog no tuaj yeem tshem tawm los ntawm qee txoj kev, xws li ua kom tsis muaj pa taws los ntawm cov pa roj carbon monoxide, thiab tau sawv rov los los ntawm kev hlawv hluav taws.
3. Kev ua haujlwm tsis ncaj ncees ua rau ua rau catalyst deactivation, xws li qhov siab tshaj qhov tsis haum, qhov teeb meem hloov mus los uas ua rau muaj kev kub ntxhov lossis tsoo ntawm lub txaj catalyst, thiab lwm yam.
