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Grain type and size of particulate matter from diesel vehicle exhausts analysed in transmission electron microscopy
Abstract
The aim of this research was to apply a simple and quick method of size and shape characterization by TEM to diesel exhaust particles from large-capacity, high-performance trucks. Particulate matter (PM) samples were collected while the engines were idling. It was found that PM from vehicle exhaust emissions can be divided into three groups: soot, irregular-shaped particles and circular particles. Irregular-shaped particles and soot aggregates were present in the exhausts of the three types of vehicle tested. Circular particles were identified only in the samples collected from exhaust emissions from the MAN vehicle, and were present in small amounts. The average surface area was in the range of 0.06 microm2 to 0.24 microm2. Mean perimeter fluctuated from 2.09 microm to 4.14 microm, and Feret diameter from 0.21 microm to 0.31 microm. Circularity was in the range of 0.12 to 0.30. Aspect ratio was around 0.30 to 0.45. Feret diameter seems to be a good parameter to define the mean size of particles, but does not take into account the influence of the shape. Therefore, this measurement seems to be useful just in the case of spherical or very rounded particles, not for all diesel PM. Thus, it is necessary to consider circularity or aspect ratio for DPM characterization. This work was supported by the Ministry of Higher Education and Science under the grant no. NN305 366338.
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Authors (4)
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Przemysław Sielicki
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Details
- Category:
- Articles
- Type:
- artykuł w czasopiśmie wyróżnionym w JCR
- Published in:
-
ENVIRONMENTAL TECHNOLOGY
no. 33,
edition 15,
pages 1781 - 1788,
ISSN: 0959-3330 - Language:
- English
- Publication year:
- 2012
- Bibliographic description:
- Sielicki P., Janik H., Guzman - Sielicka A., Namieśnik J.: Grain type and size of particulate matter from diesel vehicle exhausts analysed in transmission electron microscopy// ENVIRONMENTAL TECHNOLOGY. -Vol. 33, iss. 15 (2012), s.1781-1788
- DOI:
- Digital Object Identifier (open in new tab) 10.1080/09593330.2011.646315
- Verified by:
- Gdańsk University of Technology
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