By J.C. Jones

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2 Mitigation. Catalysts for aiding the breakdown of unburnt fuel have already been described in this volume, and such catalysts also aid the oxidation of carbon monoxide to carbon dioxide. A three-way catalyst (TWC) is a catalytic device which enables carbon monoxide and unburnt hydrcarbon to be oxidised and nitric oxide to be reduced and therefore contains an oxidation catalyst and a reduction catalyst. For them both to contain platinum is common. 3 Emission limits In a previous chapter the Euro V emission limits for NOx were given.

Khandelwal P. R. N. H. , Koskentalo T. and Maenhaut W. P. J. pdf Please click the advert what‘s missing in this equation? You could be one of our future talents MAERSK INTERNATIONAL TECHNOLOGY & SCIENCE PROGRAMME Are you about to graduate as an engineer or geoscientist? Or have you already graduated? P. Moller - Maersk. com 49 Volatile organic compounds (VOC) and ozone Atmospheric Pollution 5. 1 Introduction VOC are released from many sources, including motor vehicles and refineries. The VOC level inside a building will exceed that of the air surrounding the building by a factor of between 2 and 5.

5. 4 Pg m-3. [9] San Joaquin Valley CA Daytime concentrations about 50% higher than night-time ones. 1 from vehicular sources. 1 also of 30% between 1990 and 1997. [11] Japan, Thailand and Cambodia Concentration of PAH in the smallest particles. 5 do seem to be mainly largely from vehicles. Of course, as with the other particle size ranges considered there are major contributions from sources other than combustion processes. The effect whereby the smaller the particle size the greater the amounts of PAH carried, noted in the final row of the table, is likely to be largely a surface area effect.

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