Tus nasyog dav siv nyob rau hauv kev lag luam tshuaj feem ntau yog vim nws lub cev thiab tshuaj chemical. Nws muaj thaj chaw tshwj xeeb loj thiab zoo adsorption cov khoom, uas ua rau nws muaj cov cab kuj zoo tshaj plaws. Nyob rau hauv ntau cov tshuaj lom neeg cov tshuaj tiv thaiv, cov khoom siv catalyst ntawm cov alumina, uas tuaj yeem txhim kho qhov kev ua ub no, kev xaiv thiab kev sib tw thiab kev sib zog ntawm cov catalyst. Piv txwv li, nws tau siv dav hauv kev tawm tsam xws li hydrofining thiab catalytic cracking hauv roj av ua kom zoo. Nws tuaj yeem ua rau cov catalalst dispers ntau tusyees thiab nce thaj chaw tiv tauj ntawm reactants thiab catalyst los txhim kho cov tshuaj tiv thaiv kev ua haujlwm. Ntxiv mus, nws npaj cov kev npaj tuaj yeem hloov kho kom tau raws li qhov xav tau ntawm kev sib txawv catalytic.
Ntxiv rau,tus naskuj tuaj yeem siv ua desiccant. Nrog rau qhov muaj peev xwm nqus dej, nws tuaj yeem nqus cov dej noo hauv ib puag ncig. Hauv kev tsim tshuaj lom neeg thiab chaw kuaj mob, nws tuaj yeem khaws cov ntaub ntawv lossis qhov chaw sim kom qhuav. Piv nrog rau lwm yam desiccants xws li silica gel, nws muaj qhov zoo ntawm cov khoom xws li kev tswj hwm ntawm cov av noo thiab kev ua siab ntev rau qee yam tshuaj nyob rau hauv cov xwm txheej tshwj xeeb. Nws tuaj yeem siv los ua kom qhuav roj, kua lossis cov khoom siv thiab tiv thaiv cov ntaub ntawv los ntawm kev ntub dej, deteriorating lossis muaj kev cuam tshuam tsis zoo ntawm cov tshuaj lom neeg.