The Effect of Humidity on the Atomization Process and Structure of Nanopowder Designed for Extinguishment
Increasingly, firefighting aerosols are being used to extinguish fires. It is assumed that the extinguishing mechanism involves breaking the chain of physicochemical reactions occurring during combustion by binding free radicals at ignition. The radicals are most likely formed from the transformatio...
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| Format: | Article |
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MDPI AG
2021-06-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/14/12/3329 |
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| author | Mateusz Biel Piotr Izak Krystian Skubacz Agata Stempkowska Joanna Mastalska-Popławska |
| author_facet | Mateusz Biel Piotr Izak Krystian Skubacz Agata Stempkowska Joanna Mastalska-Popławska |
| author_sort | Mateusz Biel |
| collection | DOAJ |
| description | Increasingly, firefighting aerosols are being used to extinguish fires. It is assumed that the extinguishing mechanism involves breaking the chain of physicochemical reactions occurring during combustion by binding free radicals at ignition. The radicals are most likely formed from the transformation of water molecules, with the active surfaces of aerosol micro- or even nanoparticles. The aerosol extinguishing method is very effective even though it does not reduce oxygen levels in the air. In contrast to typical extinguishing powders, the aerosol leaves a trace amount of pollutants and, above all, does not adversely affect the environment by depleting the ozone layer and increasing greenhouse effects. Depending on how the firefighting generators are released, the aerosol can act locally or volumetrically, but depending on environmental conditions, its effectiveness can be variable. The article presents the influence of environmental humidity on the atomization of aerosol nanosize, which confirms the radical combustion mechanism. This paper presents the effect of environmental humidity on the atomization of aerosol superfine (nano) particles. The main focus was on the grain distribution and its effect on the surface activity of the FP-40C type firefighting aerosol. Changes in the characteristic parameters of the particle size distribution of RRSB (Rosin-Rammler-Sperling-Bennet) are presented. |
| first_indexed | 2024-03-10T10:22:20Z |
| format | Article |
| id | doaj.art-45d761ceecc449d38677b8199614a05c |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T10:22:20Z |
| publishDate | 2021-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-45d761ceecc449d38677b8199614a05c2023-11-22T00:20:07ZengMDPI AGMaterials1996-19442021-06-011412332910.3390/ma14123329The Effect of Humidity on the Atomization Process and Structure of Nanopowder Designed for ExtinguishmentMateusz Biel0Piotr Izak1Krystian Skubacz2Agata Stempkowska3Joanna Mastalska-Popławska4Faculty of Materials Science and Ceramics, AGH University of Science and Technology, Mickiewicza 30 Av., 30-094 Krakow, PolandFaculty of Materials Science and Ceramics, AGH University of Science and Technology, Mickiewicza 30 Av., 30-094 Krakow, PolandSilesian Centre for Environmental Radioactivity (BCR), Central Mining Institute, Plac Gwarków 1, 40-166 Katowice, PolandFaculty of Civil Engineering and Resource Management, AGH University of Science and Technology, Mickiewicza 30 Av., 30-094 Krakow, PolandFaculty of Materials Science and Ceramics, AGH University of Science and Technology, Mickiewicza 30 Av., 30-094 Krakow, PolandIncreasingly, firefighting aerosols are being used to extinguish fires. It is assumed that the extinguishing mechanism involves breaking the chain of physicochemical reactions occurring during combustion by binding free radicals at ignition. The radicals are most likely formed from the transformation of water molecules, with the active surfaces of aerosol micro- or even nanoparticles. The aerosol extinguishing method is very effective even though it does not reduce oxygen levels in the air. In contrast to typical extinguishing powders, the aerosol leaves a trace amount of pollutants and, above all, does not adversely affect the environment by depleting the ozone layer and increasing greenhouse effects. Depending on how the firefighting generators are released, the aerosol can act locally or volumetrically, but depending on environmental conditions, its effectiveness can be variable. The article presents the influence of environmental humidity on the atomization of aerosol nanosize, which confirms the radical combustion mechanism. This paper presents the effect of environmental humidity on the atomization of aerosol superfine (nano) particles. The main focus was on the grain distribution and its effect on the surface activity of the FP-40C type firefighting aerosol. Changes in the characteristic parameters of the particle size distribution of RRSB (Rosin-Rammler-Sperling-Bennet) are presented.https://www.mdpi.com/1996-1944/14/12/3329superfine nanopowder structureextinguishing efficiencyactive burning radicalshumidity |
| spellingShingle | Mateusz Biel Piotr Izak Krystian Skubacz Agata Stempkowska Joanna Mastalska-Popławska The Effect of Humidity on the Atomization Process and Structure of Nanopowder Designed for Extinguishment Materials superfine nanopowder structure extinguishing efficiency active burning radicals humidity |
| title | The Effect of Humidity on the Atomization Process and Structure of Nanopowder Designed for Extinguishment |
| title_full | The Effect of Humidity on the Atomization Process and Structure of Nanopowder Designed for Extinguishment |
| title_fullStr | The Effect of Humidity on the Atomization Process and Structure of Nanopowder Designed for Extinguishment |
| title_full_unstemmed | The Effect of Humidity on the Atomization Process and Structure of Nanopowder Designed for Extinguishment |
| title_short | The Effect of Humidity on the Atomization Process and Structure of Nanopowder Designed for Extinguishment |
| title_sort | effect of humidity on the atomization process and structure of nanopowder designed for extinguishment |
| topic | superfine nanopowder structure extinguishing efficiency active burning radicals humidity |
| url | https://www.mdpi.com/1996-1944/14/12/3329 |
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