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Catalytic converter, which also catalyzes NO x conversion but does not use urea or ammonia; Diesel exhaust fluid (DEF) or AdBlue; Exhaust gas recirculation versus selective catalytic reduction; Environmental engineering; Selective non-catalytic reduction (SNCR) NOx adsorber (LNT) Vehicle emissions control
A catalytic converter is a metal cylinder or flattened oval that’s part of the car’s exhaust system. It’s usually underneath the car with an exhaust pipe running in one end and out the other.
Rising metal prices in the U.S. during the 2000s commodities boom led to a significant increase in converter theft. A catalytic converter can cost more than $1,000 to replace, more if the vehicle is damaged during the theft. [52] [53] [54] Apart from damaging other systems of the vehicle, theft can also cause death and injury to thieves. [55]
In catalytic converters used on automobiles, the combustion of leaded gasoline produces elemental lead, lead(II) oxide, lead(II) chloride, and lead(II) bromide. Lead alloys with the metals present in the catalyst, while lead oxides and halides coat the catalyst's surfaces, reducing the converter's ability to reduce NOx emissions.
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An asphalt shingle roof has flexible asphalt shingles as the ridge cap. Some roof shingles are non-combustible or have a better fire rating than others which influence their use, some building codes do not allow the use of shingles with less than a class-A fire rating to be used on some types of buildings. Due to increased fire hazard, wood ...
Through their persistent efforts, this technology is the key emission-control component in all new light-duty vehicles in the United States and throughout the world." [5] Mooney was awarded a total of 17 patents, the latest being one for a catalytic converter for the small two-stroke engines, used in chainsaws, lawn mowers, and leaf blowers ...