Unwanted combustion enhancement by C6F12O fire suppressant

Linteris, Gregory T.; Babushok, Valeri I.; Sunderland, Peter B.; Takahashi, Fumiaki; Katta, Viswanath R.; Meier, Oliver

doi:10.1016/j.proci.2012.06.050

Cited by 74 publications

(59 citation statements)

References 30 publications

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“…The agreement between the FAA-ACT experimental results and the predicted pressure rise (based on equilibrium thermodynamics) for C 3 H 2 F 3 Br is excellent considering the simplifications in the model. Similarly, in previous work, the pressure rise with C 2 HF 5 [7] or C 6 F 12 O [8] addition was also predicted well. For C 3 H 2 F 3 Br, the experimental pressure rise at X inh = 3% is somewhat underpredicted.…”

Section: Resultssupporting

confidence: 82%

“…The PSR overall reaction rate of these mixtures, as a function of η , have been calculated in previous work [7,8], and the curves for X C2HF5 = 0.133 and X C6F12O = 0.081 are shown in Fig. 9 (together with the data for uninhibited reactants, X inh = 0, and the CF 3 Br/N 2 blends from Fig.…”

Section: Resultsmentioning

confidence: 99%

“…Typically, the fluorinated agents act as fire suppressants, and based on the previous work [4,5], they would be expected to extinguish—or at least weaken—the FAA aerosol can test explosions. Previous work [6–8] has explained the behavior of the agents C 2 HF 5 , C 6 F 12 O, and CF 3 Br (for which kinetic mechanisms were available or developed). The unexpected result is particularly surprising for 2-BTP since it contains the element Br, which is known to be a much more effective flame inhibitor than F. Using a recently developed kinetic mechanism for C 3 H 2 F 3 Br [9], the present work analyzes the behavior of C 3 H 2 F 3 Br (2-BTP) in the FAA-ACT, and compares it to CF 3 Br, to understand the reasons for the different effectiveness.…”

Section: Introductionmentioning

confidence: 99%

“…In subsequent work [7,8], the kinetic behavior of CF 3 Br, C 2 HF 5 , and C 6 F 12 O (for which kinetic mechanisms were available or developed) was studied through perfectly-stirred reactor (PSR) simulations, which explored lack of kinetic inhibition (at sub-inerting concentrations) by C 2 HF 5 and C 6 F 12 O in the aerosol can test. In order to understand the overpressure (and insufficient kinetic inhibition) by C 3 H 2 F 3 Br, the present work extends those analyses by using similar stirred-reactor simulations, but employing a recently-developed kinetic model for C 3 H 2 F 3 Br in flames [9,26].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Understanding overpressure in the FAA aerosol can test by C3H2F3Br (2-BTP)

Linteris

Babushok

Pagliaro

et al. 2016

Combustion and Flame

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Thermodynamic equilibrium calculations, as well as perfectly-stirred reactor (PSR) simulations with detailed reaction kinetics, are performed for a potential halon replacement, C3H2F3Br (2-BTP, C3H2F3Br, 2-Bromo-3,3,3-trifluoropropene), to understand the reasons for the unexpected enhanced combustion rather than suppression in a mandated FAA test. The high pressure rise with added agent is shown to depend on the amount of agent, and is well-predicted by an equilibrium model corresponding to stoichiometric reaction of fuel, oxygen, and agent. A kinetic model for the reaction of C3H2F3Br in hydrocarbon-air flames has been applied to understand differences in the chemical suppression behavior of C3H2F3Br vs. CF3Br in the FAA test. Stirred-reactor simulations predict that in the conditions of the FAA test, the inhibition effectiveness of C3H2F3Br at high agent loadings is relatively insensitive to the overall stoichiometry (for fuel-lean conditions), and the marginal inhibitory effect of the agent is greatly reduced, so that the mixture remains flammable over a wide range of conditions. Most important, the flammability of the agent-air mixtures themselves (when compressively preheated), can support low-strain flames which are much more difficult to extinguish than the easy-to extinguish, high-strain primary fireball from the impulsively released fuel mixture. Hence, the exothermic reaction of halogenated hydrocarbons in air should be considered in other situations with strong ignition sources and low strain flows, especially at preheated conditions.

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Section: Resultssupporting

confidence: 82%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Understanding overpressure in the FAA aerosol can test by C3H2F3Br (2-BTP)

Linteris

Babushok

Pagliaro

et al. 2016

Combustion and Flame

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“…C 6 F 12 O is non-combustible and non-toxic and currently limited for use in fire extinguishing agent [11], magnesium treatment, and two-phase immersion cooling system covered gas [12]. C 6 F 12 O molecule is an ozone depletion potential (ODP) gas with a GWP value close to 1 and dielectric strength of approximately 1.7 times that of pure SF 6 gas [13].…”

Section: Introductionmentioning

confidence: 99%

Insulation Strength and Decomposition Characteristics of a C6F12O and N2 Gas Mixture

et al. 2017

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This paper explores the decomposition characteristics of a new type of environmentally friendly insulating gas C 6 F 12 O and N 2 mixed gas under AC voltage. The breakdown behavior of 3% C 6 F 12 O and N 2 mixed gas in quasi-uniform field was investigated through a breakdown experiment. The self-recovery of the mixed gas was analyzed by 100 breakdown experiments. The decomposition products of C 6 F 12 O and N 2 under breakdown voltage were determined by gas chromatography-mass spectrometer (GC-MS). Finally, the decomposition process of the products was calculated by density functional theory, and the ionization energy, affinity, and molecular orbital gap of the decomposition products were also calculated. The properties of the decomposition products were analyzed from the aspects of insulation and environmental protection. The experimental results show that the 3% C 6 F 12 O and N 2 mixed gas did not show a downward trend over 100 breakdown tests under a 0.10 MPa breakdown voltage. The decomposition products after breakdown were CF

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Decomposition Kinetics of Perfluoro‐(4‐methyl‐2‐pentene) (C₆F₁₂) and its Extinguishing Performance Study

Wang,

Ji,

Zhang

2023

ChemistrySelect

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The urgent desire for Halon substitution has initiated the development of potential environment friendly alternatives since the Montreal Protocol and subsequent amendments were introduced. Atmospheric degradable agents such as halogenated alkenes, fluorinated ketones and cyclic compounds have been extensively studied. Among them, perfluoro‐(4‐methyl‐2‐pentene) (C6F12) has an analogous structure to C6F12O (Novec 1230) and has been regarded as one kind of potential substitute. In this paper, the main decomposition kinetics of C6F12 are studied numerically. In addition, the interactions between C6F12 and flames are studied experimentally. The results show that the suppression effectiveness of C6F12 is comparable to C6F12O, and the temperature rise is not obvious. The low chemical reactivity is believed to be caused by the perfluorinated methyl and isopropyl groups adjacent to olefinic carbon decreasing the reactivity of C6F12 toward OH radicals. Chemical kinetics simulation indicates that H‐induced reactions dominate the initial decomposition of C6F12, and a lot of isomers will be formed via a series of isomerization reactions and subsequent decomposition reactions at high temperature. These findings suggest the promising applicability of C6F12 and worth further study.

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Unwanted combustion enhancement by C6F12O fire suppressant

Cited by 74 publications

References 30 publications

Understanding overpressure in the FAA aerosol can test by C3H2F3Br (2-BTP)

Understanding overpressure in the FAA aerosol can test by C3H2F3Br (2-BTP)

Insulation Strength and Decomposition Characteristics of a C6F12O and N2 Gas Mixture

Decomposition Kinetics of Perfluoro‐(4‐methyl‐2‐pentene) (C₆F₁₂) and its Extinguishing Performance Study

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Unwanted combustion enhancement by C6F12O fire suppressant

Cited by 74 publications

References 30 publications

Understanding overpressure in the FAA aerosol can test by C3H2F3Br (2-BTP)

Understanding overpressure in the FAA aerosol can test by C3H2F3Br (2-BTP)

Insulation Strength and Decomposition Characteristics of a C6F12O and N2 Gas Mixture

Decomposition Kinetics of Perfluoro‐(4‐methyl‐2‐pentene) (C6F12) and its Extinguishing Performance Study

Contact Info

Product

Resources

About

Decomposition Kinetics of Perfluoro‐(4‐methyl‐2‐pentene) (C₆F₁₂) and its Extinguishing Performance Study