Study on fire extinguishing mechanism of allophanate based on Monnex dry powder

被引：2

作者：

Guo, Yueying ^{[1
]}

Chang, Zhenxiang ^{[1
]}

Tan, Zhaoyang ^{[1
]}

机构：

[1] Hebei Univ Technol, Sch Chem Engn & Technol, Hebei Prov Key Lab Green Chem Technol & High Effic, Tianjin Key Lab Chem Proc Safety, Tianjin 300131, Peoples R China

来源：

COMPUTATIONAL AND THEORETICAL CHEMISTRY | 2023年 / 1230卷

关键词：

Halon substitute; DFT; Monnex; Allophanate; Fire-extinguishing mechanism; SUPPRESSING PERFORMANCE; THERMAL-DECOMPOSITION; ATMOSPHERIC LIFETIME; OZONE DEPLETION; AGENTS; WATER;

D O I：

10.1016/j.comptc.2023.114361

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Monnex (allophanate) dry powder has a good fire extinguishing effect and is environmentally friendly. However, the reaction processes of allophanate with OH. and H. free radicals, which are of great importance for investigating its fire suppression mechanisms, are still unclear. In this work five reaction pathways related to the pyrolysis of ureyl formates, five pathways to capture OH. radicals and seven pathways to capture H. radicals were studied. It was found that, for the CO2 and NHCONH2 generation pathway possesses the energy barrier much lower than others in pyrolysis of allophanate. The generation of NHCONHCOO + H2O is the most feasible reaction channel for the reaction of allophanate with OH free radical. Moreover allophanate and its derivatives capture H radicals to achieve continuous consumption of free radicals. This study shows, it is worth further studying its applicability in fire extinguishing applications.

引用

页数：9

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