Abstract
In Korea emissions from motor vehicles are a major source of air pollution in metropolitan cities, and in Seoul a large proportion of the vehicle fleet is made up of gasoline-powered passenger cars. The carbon monoxide (CO), hydrocarbons (HC), oxides of nitrogen (NOx) and carbon dioxide (CO 2) contained in the exhaust emissions from 76 gasoline-powered passenger cars equipped with three-way catalysts has been assessed by vehicle speed, vehicle mileage and model year. The results show that CO, HC, NOx and CO CO 2 emissions remained almost unchanged at higher speeds but decreased rapidly at lower speeds. While a reduction in CO, HC and NOx emissions was noticeable in vehicles of recent manufacture and lower mileage, CO CO 2 emissions were found to be insensitive to vehicle mileage, but strongly dependent on gross vehicle weight. Lower emissions from more recent gasoline-powered vehicles arose mainly from improvements in three-way catalytic converter technology following strengthened emission regulations. The correlation between CO CO 2 emission and fuel consumption has been investigated with a view to establishing national CO CO 2 emission standards for Korea.
Original language | English |
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Pages (from-to) | 1173-1181 |
Number of pages | 9 |
Journal | Environmental Technology |
Volume | 32 |
Issue number | 11 |
DOIs | |
Publication status | Published - 2011 Aug |
Keywords
- emission characteristics
- fuel consumption
- gasoline passenger cars
- three-way catalyst
- vehicle mileage
ASJC Scopus subject areas
- Environmental Chemistry
- Water Science and Technology
- Waste Management and Disposal