Catalyst txhawb nqa ua lub luag haujlwm tseem ceeb hauv kev txo cov pa tawm hauv tsheb, tshwj xeeb tshaj yog nyob rau hauv cov cav tov diesel.Tsis muaj cov catalysts muaj ua haujlwm ntawm lawv tus kheej.Lawv xav tau ib tus neeg nqa khoom los ua lawv txoj haujlwm zoo.

Lub DPF catalyst, SCR catalyst, DOC catalyst, thiab TWC catalyst yog cov khoom uas tsim cov catalytic converter system.DPF catalysts ua lub luag haujlwm tseem ceeb hauv kev ntxiab thiab nqus cov pa roj carbon tsis zoo hauv lub tshuab hluav taws xob diesel.DPFs siv cov qauv honeycomb los ntxiab cov hmoov tshauv thiab cov hmoov tshauv.Lawv muaj cov hlau catalysts ua los ntawm platinum, palladium thiab lwm yam hlau tsis tshua muaj hauv ntiaj teb los txhawb oxidation cov tshuaj tiv thaiv thiab hlawv cov hmoov av.

SCR catalyst siv cov tshuaj aqueous urea, AdBlue, kom hnov ​​​​mob nrog emitted diazo oxides.Lub kaw lus suav nrog kev txo cov nitrogen oxides rau nitrogen thiab dej, lub tswv yim tseem ceeb rau kev txo cov pa phem hauv cov tshuab diesel.Cov tshuaj AdBlue yog txau rau hauv cov pa tso pa tawm thiab cov nitrogen oxides hnov ​​​​mob hauv SCR catalyst los tsim cov pa roj nitrogen tsis zoo.

DOC catalyst yog oxidation catalyst lub luag hauj lwm rau hloov carbon monoxide thiab hydrocarbons rau carbon dioxide thiab dej.Nws yog tsim los oxidize cov pa phem no rau hauv cov tsis muaj teeb meem.

Thaum kawg, TWC catalyst yog peb-txoj kev catalyst uas hloov cov pa phem carbon monoxide, nitrogen oxides thiab hydrocarbons rau hauv cov pa roj carbon dioxide thiab dej tsis zoo.TWC catalysts feem ntau yog siv rau hauv cov roj av cav thiab muaj txiaj ntsig zoo dua li DOC catalysts.

Cov catalysts tau piav qhia saum toj no xav tau kev txhawb nqa kom ua haujlwm tau zoo.Cov kev txhawb nqa catalyst yog ib qho tseem ceeb ntawm cov converter system, nws pab kom ntes cov pa phem, hloov lawv mus rau hauv cov khoom tsis zoo, thiab qhov tseem ceeb tshaj plaws, nws txhim kho kev ua haujlwm ntawm lub cav.Kev txhawb nqa ua raws li kev txhawb nqa rau cov hlau catalysts thiab tseem ceeb heev rau kev nce cov tshuaj tiv thaiv.Nws kuj ua rau lub catalytic converter ruaj khov.

Kev ua tau zoo ntawm cov catalyst nyob ntawm nws qhov kev txhawb nqa.Cov kev txhawb nqa tsim tsis raug tuaj yeem khiav tawm lossis txhaws cov kav dej, cuam tshuam cov khoom ntim, cuam tshuam cov tshuaj lom neeg, lossis txawm tias cov catalysts puas tsuaj.Yog li ntawd, nws yog ib qho tseem ceeb uas yuav tau xaiv cov khoom siv txhawb nqa, xws li alumina, silicon carbide lossis ceramics.

Hauv kev xaus, lub catalytic converter system yog ib qho tseem ceeb ntawm lub tsheb niaj hnub.DPF catalysts, SCR catalysts, DOC catalysts, thiab TWC catalysts ua hauj lwm hauv kev hais kwv txhiaj nrog cov catalyst txhawb kom ua tiav lawv cov dej num.Kev txhawb nqa ua lub luag haujlwm tseem ceeb hauv kev cuam tshuam cov pa phem thiab ua kom cov catalysts ua haujlwm tau zoo los ua kom lub cev muaj zog, txo qis emissions thiab txhim kho ib puag ncig kev ruaj ntseg.Xaiv cov khoom nqa khoom tsim nyog yog qhov tseem ceeb los xyuas kom meej tias koj lub catalytic converter system yuav ua haujlwm zoo thiab muab kev pabcuam ntev.