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What types of pollutions are caused by vehicle engines

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What types of pollutions are caused by vehicle engines? Cars produce lots of emissions that are harmful to the environment. These emissions are causing great concern around the world. Cars emit carbon dioxide, carbon monoxide, water, Not only do vehicles contribute remaining carbon gases, which contribute to global warming and climate change but the products of combustion also produce additional local pollution. Locally the emission of nitrogen oxides, sulphur and carbon particulates (dirt) can be very detrimental to health. How does catalytic converters helping to resolve these issues? A catalyst is a substance which changes the rate of a reaction without suffering any permanent damage. Catalysts are not used up during a reaction (so they can be reused), and they are not damaged chemically during a reaction. ...read more.


These pollutions do react on their own, but catalysts make them go faster. Catalysts are present in catalytic converters. A lean burn engine uses an oxidation catalyst which removes CO and Hydrocarbons, converting them to carbon dioxide and water. This catalyst system does not remove nitrogen oxides. Catalytic converters can be fitted to ordinary cars; instead of an oxidation catalyst, a three-way catalyst system is needed, which catalyses oxides, CO, hydrocarbons, and nitrogen oxides. This catalyst only works if the air-petrol mixture is controlled so that it is exactly balanced. The reduction catalyst is made from platinum and rhobium and it reduces NOx emissions. 2NO(g) N2(g) + O2(g) ...read more.


What problems don't have solutions yet? And how scientists are trying to tackle these issues? We draw the difference between local and global effects because all fuels have different pollution profiles and an individual, for example such as a mayor, may be only interested in curbing local pollutants. We feel that both are important but the minimisation of greenhouse gases is vital, and green, renewable fuels usually emit low local pollution levels anyway. Summary The gases given out when burning fuels in vehicles are very unsafe and dangerous for our environment. But these can be simply reduced by using the catalytic converters. Catalysts speed up chemical reactions by providing an alternative pathway for breaking and remaking bonds. But it still doesn't reduce the pollution in large amount. ...read more.

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