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Chemical Composition of Diesel/Biodiesel Particulate Exhaust by FTIR Spectroscopy and Mass Spectrometry: Impact of Fuel and Driving Cycle
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SYSNO ASEP 0476263 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Chemical Composition of Diesel/Biodiesel Particulate Exhaust by FTIR Spectroscopy and Mass Spectrometry: Impact of Fuel and Driving Cycle Author(s) Popovicheva, O.B. (RU)
Irimiea, C. (FR)
Carpentier, Y. (FR)
Ortega, I.K. (FR)
Kireeva, E.D. (RU)
Shonija, N.K. (RU)
Schwarz, Jaroslav (UCHP-M) RID, ORCID, SAI
Vojtíšek-Lom, M. (CZ)
Fosca, C. (FR)Source Title Aerosol and Air Quality Research. - : Taiwan Association for Aerosol Research - ISSN 1680-8584
Roč. 17, č. 7 (2017), s. 1717-1734Number of pages 18 s. Language eng - English Country TW - Taiwan, Province of China Keywords diesel engine ; particulate emission ; environmental pollution Subject RIV CF - Physical ; Theoretical Chemistry OECD category Physical chemistry Institutional support UCHP-M - RVO:67985858 UT WOS 000406127500003 EID SCOPUS 85023611015 DOI 10.4209/aaqr.2017.04.0127 Annotation The growing concern about air quality and the impact exhaust particles can have on the environment has resulted in the increased use of alternative fuels. A sampling campaign from a conventional heavy diesel engine operated in typical transient cycle or steady-state condition, and running on diesel, 30% biodiesel in diesel, and 100% biodiesel was carried out. The particulate composition was characterized using Fourier Transform Infrared (FTIR) spectroscopy, Two-step Laser Mass Spectrometry (L2MS), Secondary Ion Mass Spectrometry (SIMS), thermo-optical analysis, and capillary electrophoresis. Elemental carbon is demonstrated to decrease from diesel to 100% biodiesel, in agreement with the evolution of aromatic bands and the MS abundance of Cn – fragments, while organic carbon exhibits a constant level irrespective of the working regime. Aliphatic, aromatic, carboxyl, carbonyl, hydroxyl functionalities, and nitro compounds are found to depend on the engine-working regime. Mass spectra are mainly characterized by alkyl fragments (CnH2n+1 +), associated to normal and branched alkanes, PAHs and their alkylated derivatives. The addition of biodiesel to diesel changes the particulate composition towards more oxygenated constituents, such as carbonyl groups attributed to methyl ester CH3O+ fragments of unburned biodiesel. Fuel-specific fragments have been identified, such as C3H7O+ for diesel, and C2H3O2 + and CH3O– for biodiesel. Nitrogenized compounds are revealed by -NO2 functionalities and N-containing fragments. Principal Component Analysis (PCA) was successfully applied to discriminate the engine operating conditions, with a higher variance given by the fuel, thus allowing to better evaluate the environmental impacts of alternative energy source emissions. Workplace Institute of Chemical Process Fundamentals Contact Eva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227 Year of Publishing 2018
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