Perfluoroalkyl Iodides and Other New-Generation Halon Replacements

Tapscott, Robert E.; Skaggs, Stephanie R.; Dierdorf, D. S.

doi:10.1021/bk-1995-0611.ch014

Cited by 8 publications

(13 citation statements)

References 2 publications

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“…Cox and co-workers have recently investigated the IO + IO reaction by time-resolved UV absorption spectroscopy and found that OIO is a significant product, with no evidence for formation of a stabilized I 2 O 2 adduct. 35 OIO + I + N 2 f IIO 2 + N 2 (8) I + IOIO f I 2 + OIO I + IIO 2 f I 2 + OIO…”

Section: Discussionmentioning

confidence: 99%

Computational Investigations of Iodine Oxides

Misra

Marshall

1998

J. Phys. Chem. A

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Isomers of IO 2 , I 2 O, and I 2 O 2 have been characterized by ab initio methods. Vibrational frequencies and geometries were obtained at the MP2/6-31G(d) and MP2/6-311+G(3df) levels of theory, respectively. The thermochemistry was derived using approximate QCISD(T)/6-311+G(3df) (Gaussian-2) energies coupled with isodesmic reactions. Computed values of ∆ f H 298 for these molecules are the following (in kJ mol

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Section: Discussionmentioning

confidence: 99%

Computational Investigations of Iodine Oxides

Misra

Marshall

1998

J. Phys. Chem. A

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“…(4), a is the parameter of reaction time and b is the parameter of diffusion time. When the composition mass fraction of HEAE such as KNO 3 and fuel is determined, the T s , T f , T g , and Q p of HEAE is immutable. a and b increased with increasing r of HEAE, which results in the reducing of HEAE combustion rate.…”

Section: The Different Heae Density Influencing Burning Rate Of Heaementioning

confidence: 99%

“…[1][2][3] A revolution is taking place in fire suppression technology, aerosol fire-extinguishing agent developed from pyrotechnics, which is designed as a safe and practical alternative to halons, halocarbons, chemical powders, and inert gases. [4][5][6] The aerosol fireextinguishing agent is an inert nontoxic solid that remains stable until electrically or thermally activated, it combusts and produces inert gases and chemical particles (the fire-extinguishing aerosol).…”

Section: Introductionmentioning

confidence: 99%

The influencing factors of HEAE burning rate and fire suppression efficiency

Zhang¹,

Liao²,

Pan³

et al. 2006

J. Chem. Health Saf.

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Highly effective aerosol fire-extinguishing agent (HEAE) is a safe and practical alternative to Halon which developed from solid propellant technology. HEAE combusts and generates large amounts of chemical particles and inert gases, which are released into the fire scenario to extinguish the fire. HEAE burning rate has a great effect on its suppression capability.In this paper, the effects of preliminary temperature (T 0 ), the density and the raw material granularity of HEAE agent on the burning rate were examined. The results shown, in general trend, the higher T 0 , the faster burning rate of HEAE would be. The burning rate of HEAE is going up with diminution of raw material granularity of HEAE. The burning rate of HEAE is going down with increasing of density of HEAE. In addition, the relationship between the combustion rate and the fire extinguishing time is also discussed in this study.

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“…For example, by August 2018, more than 200 fire and explosion accidents occurred in China, causing casualties, property loss, and damage to the environment. In addition, Halon‐based fire‐extinguishing agents are being phased out gradually because they harm the environment . Therefore, the use of dry powder as a fire extinguisher has attracted interest of late.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, Halon-based fireextinguishing agents are being phased out gradually because they harm the environment. [1][2][3] Therefore, the use of dry powder as a fire extinguisher has attracted interest of late. The effective fire suppression ability of dry powder fire-extinguishing agents has been proved.…”

Section: Introductionmentioning

confidence: 99%

Fire suppression performance of a new type of composite superfine dry powder

et al. 2019

Fire and Materials

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Summary To enhance the performance of existing dry powders and ensure process security, a new type of dry powder based on ammonium dihydrogen phosphate (NH4H2PO4) was prepared. The prepared composite superfine dry powder was denoted as NH4H2PO4/zeolite composite in this paper. The effectiveness of commercial ABC dry powder, superfine dry powder, and the NH4H2PO4/zeolite composite in fire suppression were compared in a small‐sized fire‐extinguishing chamber. Laboratory‐scale tests showed that the NH4H2PO4/zeolite composite had considerably superior fire‐extinguishing efficiency to that of commercial ABC dry powder and superfine dry powder, along with shorter average extinguishing time and less average mass of powders consumed. In addition, the NH4H2PO4/zeolite composite also displayed much improved toxic gas suppression ability. The physical and chemical characteristics of commercial ABC dry powder, superfine dry powder, and the NH4H2PO4/zeolite composite were characterized using a range of techniques of laser particle size analysis, scanning electron microscopy, thermogravimetric analysis, and differential scanning calorimetry. Based on the analysis results, the improved fire suppression performance of the NH4H2PO4/zeolite composite can be ascribed to smaller particle size, larger surface area, and a special chemical decomposition process.

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Perfluoroalkyl Iodides and Other New-Generation Halon Replacements

Cited by 8 publications

References 2 publications

Computational Investigations of Iodine Oxides

Computational Investigations of Iodine Oxides

The influencing factors of HEAE burning rate and fire suppression efficiency

Fire suppression performance of a new type of composite superfine dry powder

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