This study investigated the impact of biodiesel (B20: 20 percent biodiesel, 80 percent conventional diesel) on oxides of nitrogen (NOx), hydrocarbons (HC), carbon monoxide (CO), and carbon dioxide (CO2) emissions from diesel school buses. Two drive cycles were developed based on the rural and urban drive cycle data collected using global positioning system (GPS) technology. Five buses were selected according to the current model year mix in Texas and were driven following the developed drive cycles for three different fuels (TxLED, B20 market blend, and B20 all soy). A state-of-the-art portable emission measurement system (PEMS) unit was used to measure the pollutant emissions along with ambient weather condition, GPS readings, and vehicle engine data. The data were aggregated to represent the current Texas school bus fleet mix and rural versus urban miles driven. The results of statistical analysis showed that using B20 had no significant effect on the level of NOx and CO2 emissions by the school buses. In contrary, it was found that the biodiesel resulted in a significant decrease of HC and increase of CO emissions.
The Impact of Biodiesel on Emissions from School Buses
Transportation Land Use, Planning, and Air Quality Congress 2007 ; 2007 ; Orlando, Florida, United States
2008-05-15
Conference paper
Electronic Resource
English
Planning , Land use , Transportation management , Air quality , Buses , Texas , Emissions , Schools
The Impact of Biodiesel on Emissions from School Buses
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