STP910

    The Use of the Accelerating Rate Calorimeter in Oxygen Compatibility Testing

    Published: Jan 1986


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    Abstract

    A number of different test methods have been utilized to assess the compatibility of various materials or substances with oxygen. Accelerating rate calorimetry is a relatively new analytical technique that has been used to detect adiabatic, self-heating reactions at rates as slow as 0.03°C/min. In this study six materials were tested by the accelerating rate calorimeter and the conventional autoignition apparatus in oxygen over a wide range of pressures.

    The results showed that exothermic reactions can occur well before the autogenous ignition temperature (AIT) for some materials. For example, nitrile rubber demonstrated that the onset of adiabatic self-heating occurred about 40 to 53°C below the AIT, and “MOBIL“ DTE 25 compressor oil showed a range of 38 to 73°C below AIT in the 13.6- to 36.7-MPa (2000- to 5400-psi) pressure range.

    Keywords:

    oxygen, calorimetry, oxygen compatibility, autogenous ignition temperature, accelerating rate calorimeter, exothermic reactions, nonmetallics


    Author Information:

    McIlroy, K
    Consultant and manager, Union Carbide Corp., Tonawanda, NY

    Zawierucha, R
    Consultant and manager, Union Carbide Corp., Tonawanda, NY


    Paper ID: STP19311S

    Committee/Subcommittee: G04.01

    DOI: 10.1520/STP19311S


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