Journal
FUEL
Volume 294, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.fuel.2021.120317
Keywords
Nanoparticles; Carbonaceous aerosols; Size-selective chemical characterization; Internal combustion engine; Catalytic stripper
Categories
Funding
- PEMS4Nano project from the European Union's Horizon 2020 research and innovation programme [724145]
- French National Research Agency (ANR) [ANR-18-CE22-0019]
- French National Research Agency (ANR) through the PIA (Programme d'Investissement d'Avenir) [ANR-10-LABX-005]
- UK EPSRC Centre for Sustainable Road Freight [EP/R035199/1]
- NERC Integrated Research Observation System for Clean Air [NE/T001909/1]
- EPSRC [EP/R035199/1] Funding Source: UKRI
- H2020 Societal Challenges Programme [724145] Funding Source: H2020 Societal Challenges Programme
- Agence Nationale de la Recherche (ANR) [ANR-18-CE22-0019] Funding Source: Agence Nationale de la Recherche (ANR)
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This study combines laser desorption/ionization mass spectrometry (L2MS) and advanced statistical techniques to investigate the impact of a catalytic stripper (CS) on the chemical composition of gasoline direct injection engine exhaust, focusing on the evolution of size-dependent chemical characteristics. The research demonstrates the necessity of a fine molecular-level characterization of exhaust particulate matter to evaluate the effect of the CS, especially for ultra-fine particles carrying the largest volatile fraction.
This work combines laser desorption/ionization mass spectrometry (L2MS) and advanced statistical techniques to reveal the impact of a catalytic stripper (CS) on the chemical composition (at the molecular level) of a gasoline direct injection engine exhaust, and follow the evolution of size-dependent chemical characteristics over the whole particles size range (10?560 nm). The gas phase and polydisperse particles making up the exhaust are separated and sampled on distinct substrates using an original homebuilt two-filter system, while size-selected particles are collected using a cascade impactor and separated into 13 different size bins (smallest diameters 10?18 nm). We demonstrate that a fine molecular-level characterization of the exhaust particulate matter is necessary to assess the effect of the CS, especially for the smallest ultra-fine particles carrying the largest volatile fraction.
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