Let's talk replacement catalytic converters?
Cargo Master
Joined: Mar 2010
Posts: 3,342
Likes: 294
From: Laramie, WY
Emissions tests typically measure carbon monoxide (CO), unburned hydrocarbons (HC) and oxides of nitrogen (NOx).
CO and HC are the result of incomplete combustion. Catalytic converters finish what the engine was trying to do, oxidize (another word for "burn" in this case) those to form carbon dioxide (CO2) and water (H2O). So with a perfect burn (in the engine, cat or both combined) there would be no CO or HC.
NOx is from too hot of a burn. It's also a pollutant. I'm not sure what a cat does with it.
CO and HC are the result of incomplete combustion. Catalytic converters finish what the engine was trying to do, oxidize (another word for "burn" in this case) those to form carbon dioxide (CO2) and water (H2O). So with a perfect burn (in the engine, cat or both combined) there would be no CO or HC.
NOx is from too hot of a burn. It's also a pollutant. I'm not sure what a cat does with it.
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