Issue 114, 2016

Experimental research on the thermal decomposition of pentafluoroethane (HFC-125) extinguishing agent with n-heptane/air pool fire in confined space

Abstract

To discuss the production law of hazardous gases (e.g. hydrogen fluoride) during the interaction between a pentafluoroethane extinguishing agent and an n-heptane flame, we designed a simulation of experimental total flooding conditions that is highly similar to the actual total flooding automatic extinguishing conditions. In this study, a qualitative and quantitative analysis on the thermolysis gaseous products was performed through GC-MS and ion chromatography (IC) by studying the thermal decomposition characteristics of the interaction between a pentafluoroethane extinguishing agent and an n-heptane flame in a 1 m3 fire-smothering room under different fire sizes and interaction times. Research results demonstrated that the thermolysis gaseous products of the pentafluoroethane extinguishing agent and n-heptane flame include hydrogen fluoride (HF) and other organic gases, such as CF3CH[double bond, length as m-dash]CF2 and CF3CH2CF3. The HF output was proportional to the fire size and interaction time. When the interaction time was controlled within 10 s, production of hazardous gases could be effectively reduced.

Graphical abstract: Experimental research on the thermal decomposition of pentafluoroethane (HFC-125) extinguishing agent with n-heptane/air pool fire in confined space

Article information

Article type
Paper
Submitted
13 Sep 2016
Accepted
19 Nov 2016
First published
21 Nov 2016

RSC Adv., 2016,6, 113713-113719

Experimental research on the thermal decomposition of pentafluoroethane (HFC-125) extinguishing agent with n-heptane/air pool fire in confined space

W. Ting, Q. Kuang, W. Hua and P. Renming, RSC Adv., 2016, 6, 113713 DOI: 10.1039/C6RA22819D

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