Aerosol mass (PAM) chamber was utilized to investigate the secondary aerosol formation of natural gas retro-fitted engine exhaust.
is required. Engine exhaust is a source of primary particulate emissions and secondary aerosol precursors, which both contribute to air quality and can cause adverse health effects.
The total mass of particles measured downstream of the PAM chamber was 6–268 times larger than the mass of the emitted primary particles. The aged particles consisted mainly of organic material, nitrate, sulfate and ammonium, their mass contributions depending on exhaust after-treatment and engine parameters. Engine operating mode, catalyst temperature and type also have impact on volatility and concentration of the total aged particles. The volatility of the total aged particles was lower than that of primary particles, suggesting that they were more stable in the atmosphere.
Researcher Sanna Saarikoski, email@example.com
Alanen, J., Simonen, P., Saarikoski, S., Timonen, H., Kangasniemi, O., Saukko, E., Hillamo, R., Lehtoranta, K., Murtonen, T., Vesala, H., Keskinen, J., Rönkkö, T. Comparison of primary and secondary particle formation from natural gas engine exhaust and of their volatility characteristics. Atmos. Chem. Phys., 17, 8739–8755, 2017
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