Elementary reactions and a mechanism for the suppression of hydrogen fires by CF₃I

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Paper for the 1997 Halon Options Technical Working Conference (HOTWC). This paper discusses elementary reactions and a mechanism for the suppression of hydrogen fires by CF₃I.

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10 p.

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Marshall, Paul; Misra, Ashutosh; Yuan, Jessie; Berry, Rajiv & McIlroy, Andrew May 1997.

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Paper for the 1997 Halon Options Technical Working Conference (HOTWC). This paper discusses elementary reactions and a mechanism for the suppression of hydrogen fires by CF₃I.

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10 p.

Notes

Abstract: Concentration profiles of stable species in low-pressure hydrogen-oxygen flames were characterized by microprobe sampling with mass spectrometric detection. This system was employed to investigate the effects of doping with CF₃I. Essentially no inhibition was observed. The observations were rationalized in terms of a 67-step mechanism, which included 24 iodine reactions. Rate constants for these iodine reactions were determined by the flash photolysis/time-resolved resonance fluorescence method, and by high level ab initio quantum calculations which characterized the potential energy surfaces, together with literature data and empirical estimates. The ab initio results agreed well with other elementary rate constant information. The flame modeling gave good accord with experiment, and revealed that in the preheat zone [H] is lowered by a cycle involving CF₃I, H and HI, but that in the combustion zone [H] is largely unaffected.

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  • Halon Options Technical Working Conference, 1997, Albuquerque, New Mexico, United States

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  • Page Start: 262
  • Page End: 271

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  • May 1997

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  • Aug. 20, 2015, 9:49 p.m.

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Marshall, Paul; Misra, Ashutosh; Yuan, Jessie; Berry, Rajiv & McIlroy, Andrew. Elementary reactions and a mechanism for the suppression of hydrogen fires by CF₃I, paper, May 1997; (digital.library.unt.edu/ark:/67531/metadc699784/: accessed September 26, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT College of Arts and Sciences.