Accession Number:

ADA244528

Title:

Initial Fire Suppression Reactions of Halons Phase 1. Development of Experimental Approach

Descriptive Note:

Final rept. Mar-Jun 1988

Corporate Author:

NEW MEXICO ENGINEERING RESEARCH INST ALBUQUERQUE

Report Date:

1990-09-01

Pagination or Media Count:

70.0

Abstract:

The objective of this effort was to develop an experimental approach for identification and characterization of the first reactions occurring when halon fire extinguishing agents enter flames. This report reviews technologies available for measurement of flame temperatures and concentrations of chemical species in flames. Methods reviewed for measurement of flame temperatures include use of thermocouples, laser Raman and coherent Anti Stokes Raman CARS spectroscopy, and silicon carbide filaments with optical monitoring. Methods assessed for applicability to measurement of concentrations of chemical species in flames include laser Raman spectroscopy, isolation of fragments and products on a frozen argon matrix followed by analysis by Fourier-transform infrared spectroscopy, and photoionization followed by mass spectrometry. An experimental approach for studying reactions of halons in flames is developed. This approach consists of four elements 1 construction of an information database, 2 an investigation of the relative importance of physical and chemical processes in halon fire extinguishment, 3 development of flame extinguishment diagnostics and characterization, and 4 time-dependent studies of free-radical reactions.

Subject Categories:

  • Safety Engineering

Distribution Statement:

APPROVED FOR PUBLIC RELEASE