It is also worth noting catalytic converters are one reason we must use unleaded fuel in cars today, as leaded fuel, which is no longer sold in Oz, prevents the catalysts from breaking down the pollution in the exhaust gases. There are typically two different catalysts inside of a common three-way catalytic converter – one which tackles nitrogen oxide by removing oxygen through a process called reduction, and the other which turns carbon monoxide into carbon dioxide by adding oxygen, called oxidation. Catalysts break down the harmful exhaust gases coming from the engine by separating the atoms which make up these molecules. How does it work?Ĭatalytic converters contain catalysts – chemicals which speed up the process of chemical reactions, which themselves do not change during this process. To put it in the simplest of terms, it’s a metal box that cleans up the emissions coming out of the back of your car, but the science behind it is far more complex than that. Generally located close to the engine, the catalytic converter is tasked with breaking down the pollution coming out the end of the tailpipe. Catalytic converters (or simply ‘cats’ for short) are one of the most important parts of the exhaust system of modern cars.
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