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Methane and Nitrous Oxide (N20) Emission Characteristics from Automobiles
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Abstract
Exhaust gases discharged from automobiles are noticed as one of the reasons for resent increase in atmospheric methane (CH4) and nitrous oxide (N2O) concentration, which have been considered as greenhouse effect gas.
In order to make an accurate estimation of methane and nitrous oxide discharged from automobiles, measurement methods of them were experimentally developed and their emissions were measured for different kinds of automobiles under various driving conditions.
Then, we 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.
As results, their emissions from passenger vehicles which have been estimated from 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.
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Koike, N. and Odaka, M., "Methane and Nitrous Oxide (N20) Emission Characteristics from Automobiles," SAE Technical Paper 960061, 1996, https://doi.org/10.4271/960061.Also In
References
- Prigent M. et al. Nitrous Oxide N 2 O in Engines Exhaust Gases A First Appraisal of Catalyst Impact SAE Paper 890492
- Jobson E. et al. Nitrous Oxide Formation over Three Way Catalyst SAE Paper 940926
- Koike N. Odaka M. Nitrous Oxide Emission Characteristics from Automobiles Proceedings of JSAE 1993 Autumn meeting October 1993
- Automotive Industry Handbook 1994 Daily Automobile Journal Co.Ltd
- Transportation Energy Handbook 1994 Transportation Policy Bureau, Ministry of Transport
- “Radiative Forcing of Climate Change” Report to IPCC from the Scientific Assessment Working Group (WGI) IPCC-X/Doc3 Part 1 1994