Novel Methods for Gas Generating Reactions

  • Allen A. Duswalt


A study was made on a Hydrox mixture (1) to determine its reactivity during storage in a sealed container. The reaction, written as NaNO2 + NH4Cl → NaCl + N2 + 2H2O presents some difficulties for normal thermal procedures. The volatility of ammonium chloride interferes with kinetic studies by thermogravimetry. Examination of the reaction in a sealed system by normal DTA techniques is not feasible because of the pressure generated by the reaction gases. However, a sample cell designed to compensate for the volatility of the ammonium salt, enabled weight-loss studies to be made in an open system. A closed system study was made by a novel “bursting capsule” technique. The results from the two methods allowed a satisfactory characterization of the reaction.


Ammonium Chloride Seal System Burst Time Sample Capsule Seal Capsule 
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  1. (1).
    Taylor, J., “Solid Propellant and Exothermic Compositions”, 1959, George Newness Limited, pp. 65–74.Google Scholar

Copyright information

© Springer Science+Business Media New York 1974

Authors and Affiliations

  • Allen A. Duswalt
    • 1
  1. 1.Hercules Incorporated Research CenterWilmingtonUSA

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