Methane and nitrous oxide (N{sub 2}O) emission characteristics from automobiles
Exhaust gases discharged from automobiles are noticed as one of the reasons for recent increase in atmospheric methane and nitrous oxide concentration, which have been considered as greenhouse gases. In order to make an accurate estimation of methane and nitrous oxide discharged from automobiles, measurement methods were experimentally developed and emissions were measured for different kinds of automobiles under various driving conditions. Then, the authors have tried to estimate the annual global emissions from automobiles using these measurement results and statistical data such as the number of automobiles, the total annual mileage, and the total annual fuel consumption, etc. The emissions from passenger vehicles which have been estimated from the global number of automobiles were 477.263 t/year for methane and 313.472 t/year for nitrous oxide. These numbers are higher than what had been estimated.
- OSTI ID:
- 287751
- Report Number(s):
- CONF-960204--; ISBN 1-56091-791-9
- Country of Publication:
- United States
- Language:
- English
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