Inhibition effectiveness of halogenated compounds

Noto, Takashi; Babushok, Valeri I.; Hamins, Anthony P.; Tsang, Wing

doi:10.1016/s0010-2180(97)81763-4

Cited by 122 publications

(64 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The bromine subset is an update of the mechanism developed by Babushok and coworkers [36,37] to describe flame inhibition by CF 3 Br. The thermodynamic properties for bromine species were adopted from the Ideal Gas Thermochemical Database by Goos, Burcat and Ruscic [49], with updates from Active Thermochemical Tables, as described above.…”

Section: Reaction Mechanismmentioning

confidence: 99%

“…The thermodynamic properties for bromine species were adopted from the Ideal Gas Thermochemical Database by Goos, Burcat and Ruscic [49], with updates from Active Thermochemical Tables, as described above. The transport coefficients for use in flame modeling were drawn from Noto et al [37].…”

Section: Reaction Mechanismmentioning

confidence: 99%

“…These early studies dealt mainly with HBr and Br 2 as inhibitors. More recent chemical kinetic studies of the interaction of bromine species with combustion chemistry have emphasized CF 3 Br and related halogens [19,22,[34][35][36][37][38][39].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Inhibition of hydrogen oxidation by HBr and Br2

Dixon‐Lewis

Marshall

Ruščić

et al. 2012

Combustion and Flame

View full text Add to dashboard Cite

The high-temperature bromine chemistry was updated and the inhibition mechanisms involving HBr and Br 2 were re-examined. The thermochemistry of the bromine species was obtained using the Active Thermochemical Tables (ATcT) approach, resulting in improved data for, among others, Br, HBr, HOBr and BrO. Ab initio calculations were used to obtain rate coefficients for selected reactions of HBr and HOBr, and the hydrogen/bromine/oxygen reaction mechanism was updated. The resulting model was validated against selected experimental data from literature and used to analyze the effect of HBr and Br 2 on laminar, premixed hydrogen flames. Our work shows that hydrogen bromide and molecular bromine act differently as inhibitors in flames. For HBr, the reaction HBr + H ⇀ ↽ H 2 + Br (R2) is rapidly equilibrated, depleting HBr in favor of atomic Br, which is the major bromine species throughout the reaction zone. The chain-breaking

show abstract

Section: Reaction Mechanismmentioning

confidence: 99%

Section: Reaction Mechanismmentioning

confidence: 99%

See 1 more Smart Citation

Inhibition of hydrogen oxidation by HBr and Br2

Dixon‐Lewis

Marshall

Ruščić

et al. 2012

Combustion and Flame

View full text Add to dashboard Cite

show abstract

“…However, since the ban on the production of fire suppression agents containing bromine in 1987, the search for alternative fire suppressants has been motivated to establish their effectiveness and to understand the fire suppression mechanism of the new agents both for premixed flame [2,3] and diffusion flame [4,5]. Among newly suggested fire suppression agents, water mist has many advantages as it is inexpensive, ubiquitous, non-electrically conductive and nontoxic [6,7].…”

Section: Introductionmentioning

confidence: 99%

“…Laminar burning velocity is a fundamental property of a flammable gas mixture describing the overall reaction rate, heat release, and heat and mass transport in the flame, and as such the reduction in laminar burning velocity is frequently used as an indicator of the effectiveness of an inhibiting agent [2,3,8]. In addition, diffusion flames often have a stabilization region at their bases that is premixed, and good correlation has been found between the reduction in burning velocity and the concentration of inhibitors to extinguish a diffusion flame [9].…”

Section: Introductionmentioning

confidence: 99%

Effect of water mist on temperature and burning velocity of stretched propane-air premixed flames

Yoshida¹,

Momomoto²,

Naito³

et al. 2013

Computational Methods in Multiphase Flow VII

View full text Add to dashboard Cite

Effects of fine water mist on the flame temperature and laminar burning velocity of propane/air premixed flame were investigated by using a single jet-plate configuration. For the case without water mist, the measured laminar burning velocities are in reasonably good agreement with previously reported data and numerical simulation. The dependence of the burning velocity on the stretch rate for the case without water mist is positive for all mixtures tested, resulting in the negative Markstein length, which coincides with previous experimental and theoretical studies. With water mist addition, the laminar burning velocity is lowered significantly and its dependence on the stretch rate is changed to negative. This leads to apparently positive Markstein lengths. Concurrently, the flame temperature decreases linearly with the water mist mass loading. Also, it decreases with the stretch rate, even if the water mist mass loading is kept constant. The positive Markstein length was discussed on the basis of the mist droplets behavior in the stagnation flow field. Even if the mist mass loading is kept constant, the mist droplets do not follow the diverting flow field when the stretch rate is high and the droplets accumulation occurs in the stagnation region where the burning velocities were measured. This fact results in the lower burning velocity and lower flame temperature as compared to those measured for uniformly dispersed water mist.

show abstract

Comprehensive Theoretical and Experimental Studies on the CF₃H Fire‐extinguishing Mechanism

Zhou

2011

Chin. J. Chem.

View full text Add to dashboard Cite

In order to clarify the chemical suppression mechanisms of CF3H, experimental and theoretical studies were conducted respectively in this paper. Firstly, the combustion species in low pressure laminar premixed flat methane flames with CF3H addition is measured by synchrotron radiation molecular beam mass spectrometry (SR‐MBMS) experimentally. Fire suppression chemistry of CF3H is investigated by selective detection of combustion radicals and intermediates in experimental process. Secondly, quantum chemistry calculations are performed to calculate the potential energy surfaces (PES) for the CF3H unimolecular dissociation reaction and reactions of CF3H with free radical OH and H at the B3LYP/6‐311++G** and QCISD(T)/6‐311++G** levels. Finally, the chemical suppression mechanism of CF3H was discussed by comparing the theoretical calculation with experimental measurement.

show abstract

Inhibition effectiveness of halogenated compounds

Cited by 122 publications

References 17 publications

Inhibition of hydrogen oxidation by HBr and Br2

Inhibition of hydrogen oxidation by HBr and Br2

Effect of water mist on temperature and burning velocity of stretched propane-air premixed flames

Comprehensive Theoretical and Experimental Studies on the CF₃H Fire‐extinguishing Mechanism

Contact Info

Product

Resources

About

Inhibition effectiveness of halogenated compounds

Cited by 122 publications

References 17 publications

Inhibition of hydrogen oxidation by HBr and Br2

Inhibition of hydrogen oxidation by HBr and Br2

Effect of water mist on temperature and burning velocity of stretched propane-air premixed flames

Comprehensive Theoretical and Experimental Studies on the CF3H Fire‐extinguishing Mechanism

Contact Info

Product

Resources

About

Comprehensive Theoretical and Experimental Studies on the CF₃H Fire‐extinguishing Mechanism