Characterization of exhaust particles from military vehicles fueled with diesel, gasoline, and JP-8.
Diluted exhaust from selected military aircraft ground-support equipment (AGE) was analyzed for particulate mass, elemental carbon (EC) and organic carbon (OC), SO4(2-), and size distributions. The experiments occurred at idle and load conditions and utilized a chassis dynamometer. The selected AGE vehicles operated on gasoline, diesel, and JP-8. These military vehicles exhibited concentrations, size distributions, and emission factors in the same range as those reported for nonmilitary vehicles. The diesel and JP-8 emission rates for PM ranged from 0.092 to 1.1 g/kg fuel. The EC contributed less and the OC contributed more to the particulate mass than reported in recent studies of vehicle emissions. Overall, the particle size distribution varied significantly with engine condition, with the number of accumulation mode particles and the count median diameter (CMD) increasing as engine load increased. The SO4(2-) analyses showed that the distribution of SO4(2-) mass mirrored the distribution of particle mass.
Kelly
Kerry E
KE
Department of Chemical and Fuels Engineering, University of Utah, Salt Lake City, Utah, USA. kelly@eng.utah.edu
Wagner
David A
DA
Lighty
JoAnn S
JS
Sarofim
Adel F
AF
Rogers
C Fred
CF
Sagebiel
John
J
Zielinska
Barbara
B
Arnott
W Pat
WP
Palmer
Glenn
G
D000393:Air Pollutants / Q000032:analysis*; D002273:Carcinogens / Q000737:chemistry*; D004738:Engineering; D004784:Environmental Monitoring; D005579:Fossil Fuels; D005742:Gasoline; D006838:Hydrocarbons / Q000737:chemistry*; D018986:Motor Vehicles; D010316:Particle Size; D010578:Petroleum; D001335:Vehicle Emissions / Q000032:analysis*
D000393:Air Pollutants; D002273:Carcinogens; D005579:Fossil Fuels; D005742:Gasoline; D006838:Hydrocarbons; C098607:JP8 aviation fuel; D010578:Petroleum; D001335:Vehicle Emissions