Accession Number : ADA316811

Title :   Investigation of Possible Decomposition of Alternative Fire-Extinguishing Agents Discharged Through a Vehicle Personnel Heater.

Descriptive Note : Final rept. Jun 95-Jan 96,

Corporate Author : ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD

Personal Author(s) : McNesby, Kevin L. ; Modiano, Steven H. ; Marsh, Paul ; Bolt, William ; Herud, Craig

PDF Url : ADA316811

Report Date : OCT 1996

Pagination or Media Count : 49

Abstract : Fourier transform infrared (FT-IR) spectroscopy was used to monitor the possible thermal decomposition of alternative fire-extinguishing agents discharged through a vehicle personnel heater. The agent was introduced into the heater air induction pen and flowed across the heat exchanger manifold. Gas samples were removed from the hot air output duct extension of the heater via stainless steel tubing and flowed through a 1Om path-length multipass optical gas cell placed in the sample beam of an PT-IR spectrometer. Five fire-extinguishing agents, CF3Br (trade name, Halon 1301), C3F7H (FM-200), C3F6H2 (FE-36), C2F5H (FE-25), and CF3H (FE-13), were tested for two manifold temperatures of 380 and 480-510 deg C. No agent decomposition or combustion gas products could be detected for any of the agents tested under these temperature conditions. The agent decomposition products of interest were HF, HBr, CO, CF3H, C2H2, CH4, C2H4, and CF2O.

Descriptors :   *FOURIER TRANSFORMATION, *SPECTROSCOPY, *INFRARED RADIATION, TEMPERATURE, AIR, STAINLESS STEEL, HEAT EXCHANGERS, GASES, SAMPLING, PERSONNEL, MANIFOLDS(ENGINES), DECOMPOSITION, INDUCTION SYSTEMS, TUBES, HEATERS, COMBUSTION PRODUCTS, PENETRATION AIDS, VEHICLE HEATERS.

Subject Categories : Numerical Mathematics
      Atomic and Molecular Physics and Spectroscopy
      Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE