Waa maxay shirarka catalytic-ka:
DIIWAAN GELINTA DIIWAANKA KHUDBADAHA QOYSKA EE DHAQANKA. Aaladda dib-u-beddelka casaanku waa aalad daahir ah oo adeegsata hawsha cunnada si ay ugu beddelaan CO, HC iyo Nox gaaska daallanka oo aan dhib lahayn oo aan dhib lahayn, oo sidoo kale loo yaqaan aaladda dib-u-beddelka bini-aadamka. Qalabka beddelka ee dib-u-beddelka ayaa beddelaya saddexda gaas ee waxyeelada leh ee CO, HC iyo NITROGEN, Hydrogen, Hydrogen, Hydrogen-ka iyo Falcelinta Gaadhiga ee Ku-saleysan,-ka-soo-celinta Steam-ka iyo Falcelinta Kordhinta Tallaabada Action.
Marka loo eego qaabka daahirinta ee aaladda dib-u-habeynta caleenta, waxaa loo qaybin karaa aaladda dib-u-beddelka uurjiifka, yareynta aaladda dib-u-beddelka catalytic iyo aaladda sadex-dhinac ah oo ka beddela.