Title: Gasoline cars produce more carbonaceous particulate matter than modern filter-equipped diesel cars
Authors: PLATT STEPHENHADDAD IMADPIEBER SIMONEZARDINI ALESSANDROSUAREZ BERTOA RICARDOCLAIROTTE MICHAELDALLENBACH K.R.HUANG RUJINSLOWIK JAYHELLEBUST STIGTEMIME-ROUSSEL BRICEMARCHAND NICHOLASDE GOUW J.JIMENEZ J.HAYES P.L.ROBINSON A.L.BALTENSPERGER URSASTORGA-LLORENS MARIAPREVOT ANDRE S. H.
Citation: SCIENTIFIC REPORTS vol. 7 p. 4926
Publisher: NATURE PUBLISHING GROUP
Publication Year: 2017
JRC N°: JRC96474
ISSN: 2045-2322
URI: http://publications.jrc.ec.europa.eu/repository/handle/JRC96474
DOI: 10.1038/s41598-017-03714-9
Type: Articles in periodicals and books
Abstract: Carbonaceous particulate matter (PM), comprising black carbon (BC), primary organic aerosol (POA) and secondary organic aerosol (SOA, from atmospheric aging of precursors), is a highly toxic vehicle exhaust component. Therefore, understanding vehicle pollution requires knowledge of both primary emissions, and how these emissions age in the atmosphere. We provide a systematic examination of carbonaceous PM emissions and parameterisation of SOA formation from modern diesel and gasoline cars at different temperatures (22, −7 °C) during controlled laboratory experiments. Carbonaceous PM emission and SOA formation is markedly higher from gasoline than diesel particle filter (DPF) and catalyst-equipped diesel cars, more so at −7 °C, contrasting with nitrogen oxides (NOX). Higher SOA formation from gasoline cars and primary emission reductions for diesels implies gasoline cars will increasingly dominate vehicular total carbonaceous PM, though older non-DPF-equipped diesels will continue to dominate the primary fraction for some time. Supported by state-of-the-art source apportionment of ambient fossil fuel derived PM, our results show that whether gasoline or diesel cars are more polluting depends on the pollutant in question, i.e. that diesel cars are not necessarily worse polluters than gasoline cars.
JRC Directorate:Energy, Transport and Climate

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