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Considerations in analysing elemental carbon from marine engine exhaust using residual, distillate and biofuels

Research output: Contribution to journalArticleScientificpeer-review


Original languageEnglish
Pages (from-to)191-204
Number of pages14
JournalJournal of Aerosol Science
Publication statusPublished - Dec 2018
Publication typeA1 Journal article-refereed


Elemental carbon (EC) concentrations in the exhaust of a medium-speed marine engine was evaluated using thermal-optical analysis (TOA). Particulate matter (PM) samples were collected at 75% and 25% engine loads using residual and distillate fuels with sulphur contents of 2.5%, 0.5% and 0.1%, and a biofuel (30% of bio-component). The EC analysis of PM samples from a marine engine proved to be challenging. For example, transformations of structure of the sampled particles in the inert and the oxygen mode were observed for marine engine exhaust samples. The relationship between constituents present in the samples from the marine engine using different fuels, and phenomena observed in the thermograms are discussed. Temperature protocol selection and sample pre-treatment (extractions and drying) affected the reported EC mass. Modifications in the methodology were suggested to increase the accuracy of the analysis. Repeatability and reproducibility of the EC analysis was studied in the round-robin of three laboratories.


  • Elemental carbon EC, Fuel, Marine engine, Round-robin, Thermal-optical analysis TOA, Thermogram

Publication forum classification

Field of science, Statistics Finland