A catalytic converter is an exhaust emission control device that reduces toxic gases and pollutants in exhaust gas from an internal combustion engine into less-toxic pollutants by catalyzing a redox reaction an oxidation and a reduction reaction.
source/image: Warped Perception
Catalytic converters are installed on most vehicles and other internal combustion engines in order to process unburned hydrocarbons from exhaust gasses with a catalyst. These can get extremely hot, and this high temperature complicated the build somewhat.
Ever wonder what’s happening inside your catalytic converter? I Make a See Through Catalytic Converter to see what’s happening inside the catalytic converter when it’s functioning.
You can clearly see that when it’s not within its normal operating temperature it’s not doing too much, I’m guessing this is why most cars put out the majority of their pollution during the first 5 minutes of startup.