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International Journal of Energetic Materials and Chemical Propulsion
ESCI SJR: 0.149 SNIP: 0.16 CiteScore™: 0.29

ISSN 印刷: 2150-766X
ISSN オンライン: 2150-7678

International Journal of Energetic Materials and Chemical Propulsion

DOI: 10.1615/IntJEnergeticMaterialsChemProp.v7.i2.10
pages 87-97

FORMATION OF PYROPHORIC IRON PARTICLES BY H2 REDUCTION OF OXALATE AND OXIDES

Rajesh V. Shende
Chemical and Biological Engineering Department, South Dakota School of Mines and Technology, Rapid City, South Dakota 57701
Alok Vats
South Dakota School of Mines & Technology, Rapid City, SD 57701 USA
Zachary D. Doorenbos
South Dakota School of Mines & Technology, Rapid City, SD 57701 USA
Deepak Kapoor
Armament Research, Development, and Engineering Center, Picatinny Arsenal, NJ 07806 USA
Darold Martin
Armament Research, Development, and Engineering Center, Picatinny Arsenal, NJ 07806 USA
Jan A. Puszynski
Chemical and Biological Engineering Department, South Dakota School of Mines and Technology, Innovative Materials and Processes, LLC, Rapid City, South Dakota 57701

要約

The thermal decomposition and reduction of Fe-oxalate to form pyrophoric iron particles were investigated. Decomposition and reduction experiments were performed in a tubular quartz reactor at 450−520°C under reducing environment of 5−50 vol% H2 and 95−50 vol% N2. Thermogravimetric analysis (TGA) and Differential Scanning Calorimetry (DSC) revealed that the decomposition of Fe-oxalate in an inert atmosphere is a two-step process involving the removal of water and decomposition of oxalate to iron oxides. In the presence of H2, the products of decomposition are reduced into α-Fe particles. The results have shown that Fe-particles generated from oxalate are pyrophoric in air and burn within 15−30 seconds with maximum temperatures generated in the range of 620−820°C. The effect of reduction temperature, H2 concentration, and sample geometry on pyrophoric behavior was also investigated. In other efforts, Fe-oxalate was synthesized from FeCl2.2H2O and its pyrophoric performance was compared with the commercial material.

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