Research Article

Particulate Emissions Hazards Associated with Fueling Heat Engines

Table 1

Particulate sizes classified by aerodynamic diameter.

ClassificationExamples

Coarse: 2.5–10 μm (PM10)Road and agricultural dust, tire wear
Fine: <2.5 μm (PM2.5)Gas to particulate conversion in combustion and industrial processing
Ultrafine: <0.1 μm (<100 nm)-nanomaterial particulatesExhaust emissions (tailpipe), such as aircraft HCfueled mobility/stationary systems