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.
|Early online date||8 Mar 2021|
|Publication status||Published - 15 Jun 2021|
FunderPEMS4Nano project from the European Union’s Horizon 2020 research and innovation programme under Grant Agreement No. 724145. Additionally, this work was supported by the French National Research Agency (ANR) under contract ANR-18-CE22-0019 (UNREAL) and through the PIA (Programme d’Investissement d’Avenir) under contract ANR-10-LABX-005 (LABEX CaPPA – Chemical and Physical Properties of the Atmosphere) and by the UK EPSRC Centre for Sustainable Road Freight ( EP/R035199/1 ) and NERC Integrated Research Observation System for Clean Air ( NE/T001909/1 ).
- Carbonaceous aerosols
- Catalytic stripper
- Internal combustion engine
- Size-selective chemical characterization
ASJC Scopus subject areas
- Chemical Engineering(all)
- Fuel Technology
- Energy Engineering and Power Technology
- Organic Chemistry