Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
11032641 | Journal of Aerosol Science | 2018 | 22 Pages |
Abstract
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.
Related Topics
Physical Sciences and Engineering
Earth and Planetary Sciences
Atmospheric Science
Authors
Päivi Aakko-Saksa, Päivi Koponen, Minna Aurela, Hannu Vesala, Pekka Piimäkorpi, Timo Murtonen, Olli Sippula, Hanna Koponen, Panu Karjalainen, Niina Kuittinen, Pavlos Panteliadis, Topi Rönkkö, Hilkka Timonen,