Regulated and speciated hydrocarbon emissions from a dual fuel light duty vehicle with and without a three-way catalyst

The regulated pollutants (CO, HC and NO_x) and unregulated pollutants (volatile organic compounds and carbonyl compounds), emitted from a dual fuel vehicle fueled with gasoline and E10 fuel, are measured under a transient cycle and steady modes. The impacts of a three-way catalyst (TWC) are investigated for the two types of fuels. The measured results show that NO_x and acetaldehyde emitted from the E10-fueled car are much more than that from the gasoline-fueled car under the same modes. On the basis of maximum incremental reactivity (MIR) factors and emissions of organic gases, the ozone specific reactivity of the tailpipe gases are evaluated. Copyright.