Quote:
Originally Posted by racprops
Sorry NO the don't The burn cycle is too slow to fully use 100% of the fuel other wise we would be told to cut out the cats as they are no longer needed.
Rich
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Two major functions of catalytic converters are to convert carbon monoxide to carbon dioxide, and to convert nitrogen oxides to nitrogen and oxygen.
A quick search reveals this on ResearchGate:
https://www.researchgate.net/figure/...fig4_329043343
Quote:
Comparison graph of HC level with and without a catalytic converter in RON 88.
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If hydrocarbons are at ~80 parts per million, that is 0.008% HC by part.
Fuel and air ought to be at a 14.7:1 ratio, so adjusting for ratio, the unburnt portion of fuel coming out of the exhaust is 0.054% of the fuel that went into the engine.
0.054% unburnt still means that you get a tenth of a gallon of gasoline
vapor dumped in the air for every gallon of gasoline
liquid which is sent through the engine.