Dependence of the fire retardant and fire extinguishing efficiency of compositions based on phosphates of bivalent and trivalent ammonium metals on their physicochemical properties

Authors

  • Valentina V. Bogdanova Research Institute for Physical Chemical Problems of the Belarusian State University; 220006, Belarus, Minsk, ul. Leningradskaya, 14 https://orcid.org/0000-0002-8557-9925
  • Ol'ga I. Kobets Research Institute for Physical Chemical Problems of the Belarusian State University; 220006, Belarus, Minsk, ul. Leningradskaya, 14 https://orcid.org/0000-0002-6702-7430
  • Aleksandr V. Vrublevskiy State Educational Establishment «University of Сivil Protection of the Ministry for Emergency Situations of the Republic of Belarus»; 220118, Belarus, Minsk, ul. Mashinostroiteley, 25 https://orcid.org/0000-0002-4179-5407

DOI:

https://doi.org/10.33408/2519-237X.2020.4-4.367

Keywords:

flame retardants, wood, peat, metal-ammonium phosphates, physicochemical, thermal, fire-retardant properties

Abstract

Purpose. The object of research were fire-retardant and fire-extinguishing agents based on ammonium phosphates of bivalent and trivalent metals used for the treatment of forest combustible materials (FCM), including wood and peat. The subject of the research was to determine the fire-retardant and fire-extinguishing effectiveness of these agents, depending on their physical and chemical properties determined by the conditions of synthesis. The aim was to establish common traits or difference in the mechanism of inhibition of combustion of FCM by metallophosphate systems of various chemical compositions, as well as to reveal the role of the processes occurring in the condensed phase under the influence of their thermal decomposition products. The main task was to study the physicochemical, thermal properties of fire-retardant and fire-extinguishing agents, as well as fire-protected samples of peat and other FCM in the temperature range on the burning surface of natural materials (200–500 °C).

Methods. X-ray phase analysis, differential scanning calorimetry, chemical analysis.

Findings. The factors determining the fire-retardant and fire-extinguishing efficiency of synthetic agents based on phosphates of bivalent and trivalent ammonium metals with controlled properties depending on the synthesis conditions with respect to FCM, wood and peat have been determined. A process has been established that has a dominant effect on stopping their combustion – inhibition of radical reactions in the gas phase by volatile nitrogen-containing products. At the same time, it was shown that when developing new fire-retardant and fire-extinguishing agents, it is necessary to take into account their properties such as the ability to form thermal insulating structures in the condensed phase.

Application field of research. The results obtained in this work can be used to create new fire-retardant and fire-extinguishing synthetic compositions based on ammonium phosphates of bivalent and trivalent metals for the treatment of forest fuels.

Author Biographies

Valentina V. Bogdanova, Research Institute for Physical Chemical Problems of the Belarusian State University; 220006, Belarus, Minsk, ul. Leningradskaya, 14

Laboratory of Fire Extinguishing Materials, Head of Laboratory; Grand PhD in Chemical Sciences, Professor

Ol'ga I. Kobets, Research Institute for Physical Chemical Problems of the Belarusian State University; 220006, Belarus, Minsk, ul. Leningradskaya, 14

Laboratory of Fire Extinguishing Materials, Leading Researcher; PhD in Chemical Sciences

Aleksandr V. Vrublevskiy, State Educational Establishment «University of Сivil Protection of the Ministry for Emergency Situations of the Republic of Belarus»; 220118, Belarus, Minsk, ul. Mashinostroiteley, 25

Chair of Combustion and Explosion Processes, Head of Chair; PhD in Chemical Sciences, Associate Professor

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Published

2020-11-20

How to Cite

Bogdanova, V. V., Kobets, O. I. and Vrublevskiy, A. V. (2020) “Dependence of the fire retardant and fire extinguishing efficiency of compositions based on phosphates of bivalent and trivalent ammonium metals on their physicochemical properties”, Journal of Civil Protection, 4(4), pp. 367–377. doi: 10.33408/2519-237X.2020.4-4.367.

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Section

Fire and industrial safety (technical sciences)

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