Study of the mechanism of HF produced by fire extinguishing with perfluorohexanone and 2-bromo-3,3,3-trifluoropropene mixture

Fire Science and Technology ›› 2026, Vol. 45 ›› Issue (7): 68-72.

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Study of the mechanism of HF produced by fire extinguishing with perfluorohexanone and 2-bromo-3,3,3-trifluoropropene mixture

Zheng Bin¹, Zhu Simin¹, Wang Fei²

(1. China Fire and Rescue Institute, Beijing 102202, China; 2. Zhejiang Research Institute of Chemical Industry Co., Ltd., Hangzhou Zhejiang 310023, China)

Received:2025-10-27 Revised:2025-11-12 Online:2026-07-15 Published:2026-07-15

Abstract

Abstract: To investigate the inhibitory effect of the mixture of perfluorohexanone and 2-bromo-3,3,3-trifluoropropene (2-BTP) on hydrogen fluoride generation, a cup-burner-based experimental platform was established in this study. By measuring the amount of hydrogen fluoride generated, the suppression efficiency of different mixing ratios on hydrogen fluoride production was examined. Combined with quantum chemical calculations and Monte Carlo simulations, the pyrolysis pathway of perfluorohexanone and the hydrogen fluoride generation behavior under various mixing ratios were analyzed. The results indicate that when the volume fraction of 2-BTP ranges from 25% to 30%, the inhibitory effect on hydrogen fluoride is the most significant. Due to the low bond dissociation energy of the C—C bond adjacent to the carboxyl group, perfluorohexanone is prone to pyrolysis. The optimal inhibitory effect on hydrogen fluoride generation is achieved when the ratio of perfluorohexanone to 2-BTP is 2∶1.

Key words: perfluorohexanone, 2-BTP, fire extinguishing agent, pyrolysis, hydrogen fluoride

Zheng Bin, Zhu Simin, Wang Fei. Study of the mechanism of HF produced by fire extinguishing with perfluorohexanone and 2-bromo-3,3,3-trifluoropropene mixture[J]. Fire Science and Technology, 2026, 45(7): 68-72.

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Study of the mechanism of HF produced by fire extinguishing with perfluorohexanone and 2-bromo-3,3,3-trifluoropropene mixture

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