Ingabe udizili udinga isiguquli se-catalytic?

Umsebenzi we-catalyst ukunciphisa ukukhishwa kwezingxenye eziyingozi zokukhipha umoya, kuhlanganise nalezo ezikhishwa injini ye-diesel.

Sekuyiminyaka engaphezu kwengu-20 abakhiqizi bezimoto besebenzisa iziguquli ze-catalytic ezinhlelweni zokukhipha umoya wezinjini zikaphethiloli. Njengoba i-catalytic converter iyithuluzi elisetshenziselwa ukunciphisa ukukhishwa kwezingxenye eziyingozi zibe amagesi okukhipha umoya, iphinde isetshenziswe ezinjinini zikadizili. Injini kadizili ikhipha umule, ama-hydrocarbon, i-sulphur dioxide, ama-nitrogen oxides nezinsimbi: i-calcium, i-magnesium, insimbi ne-zinc ngenxa yesimiso sokusebenza kanye nophethiloli osetshenziswayo. I-oxidation catalyst esetshenziswa kabanzi ihlinzeka ngamaphesenti angama-98 okukhishwa kwesulfure dioxide kanye nokukhishwa kwe-hydrocarbon ne-carbon monoxide engaphezu kwamaphesenti angama-80. Kusukela ngo-2005, lapho izinga le-Euro IV liqala ukusebenza ezinhlelweni zokukhipha umoya wezinjini zikadizili, kuyodingeka ukuthi kufakwe ama-catalyst kanye nesihlungi sezinhlayiya, mhlawumbe enye into ezokwenza ukuthi i-nitrogen oxide ingasebenzi.