Investigation of the fire suppression mechanism of aerosol generators based on mineral carriers

 

Kutsenko Maria

National University of Civil Protection of Ukraine

https://orcid.org/0000-0001-6879-9187

 

Nuianzin Oleksandr

National University of Civil Protection of Ukraine

https://orcid.org/0000-0003-2527-6073

 

Yelagin Georgii

National University of Civil Protection of Ukraine

https://orcid.org/0000-0003-2577-6430

 

Kryshtal Dmytro

National University of Civil Protection of Ukraine

https://orcid.org/0000-0003-3254-4574

 

Alekseev Anatoly

National University of Civil Protection of Ukraine

https://orcid.org/0000-0003-4114-5807

 

DOI: https://doi.org/10.52363/2524-0226-2026-43-15

 

Keywords: fire extinguishing, fire, maritime transport, oil, peat, inhibition, aerosol generators, aerosol, immobilization, fire-extinguishing agent

 

Аnnotation

 

The problem addressed in this work is the low efficiency of traditional fire extinguishing pow-ders when extinguishing fires of spilled flammable liquids on water surfaces and when preventing the spread of peat fires, as well as the lack of a substantiated physicochemical mechanism of action and an optimal composition of such agents. The object of this study is the process of fire extinguishing using aerosol fire extinguishing generators based on highly porous mineral carriers. The aim of the study was to determine the mechanism of combustion inhibition by an aerosol cloud, to identify the factors affecting the efficiency of aerosol generators under different application conditions, and to substantiate the optimal composition of the generator. The topochemistry of the interaction between the fire extinguishing aerosol cloud and the active centers of chain reactions of combustion and smoldering was analyzed, the factors influencing the effectiveness of generators when extinguishing fires on water surfaces and when preventing the spread of peat fires were determined, and the volume of the aerosol cloud generated during the operation of the generator was calculated. It was established that combustion inhibition occurs due to the interaction of active radicals with inhibitor molecules resulting in the formation of low-reactive radicals with a delocalized electron, which leads to the ter-mination of chain combustion reactions. It was shown that buoyancy of the granules is the determin-ing factor for extinguishing fires on water surfaces, while the ability of the aerosol to penetrate into the porous structure and create an inert gas environment is important for preventing the spread of peat fires. Calculations showed that 1 cm³ of generator granules produces about 364 cm³ of gas-aerosol mixture under normal conditions, which corresponds to approximately 1300 cm³ of aerosol cloud at a temperature of about 1000 K. The optimal mass ratio of the components “expanded ver-miculite : polyvinyl alcohol : potassium nitrate” was determined to be 1:2:8.7. The obtained results make it possible to reasonably design aerosol fire extinguishing generators for various application conditions.

 

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Received by the editorial board: 10.03.2026

Accepted for publication: 13.04.2026

Date of publication (release): 31.05.2026