Effect of Energetic Materials on Thermal Decomposition of Phase-Stabilised Ammonium Nitrate - An Eco-Friendly Oxidiser

  • Suresh Mathew Vikram Sarabhai Space Centre, Thiruvananthapuram
  • K. Krishnan Vikram Sarabhai Space Centre, Thiruvananthapuram
  • K. N. Ninan Vikram Sarabhai Space Centre, Thiruvananthapuram
Keywords: Thermodynamic parameters, Kissinger method, Ozawa method

Abstract

Phase-stabilised ammonium nitrate (PSAN) was prepared by incorporating copper (II) diamine nitrate in the ammonium nitrate (AN) crystal lattice, thereby avoiding the abrupt volume change within the useful temperature range. The effect of RDX on the thermal decomposition of PSAN has been investigated. Decomposition temperatures of PSAN and RDX are almost in the same temperature range. The synergetic effect of the interaction between PSAN and RDX resulted in a net exothermic reaction of PSAN. The kinetic and thermodynamic parameters of the exothermic decomposition have been computed. Two well-known equations based on variable programme heating rate method, viz., Kissinger and Ozawa equations were employed for the kinetic evaluation. The approximate activation energy obtained from Ozawa method was refined by an iteration procedure using the two-term approximation for Arrhenius temperature integral, p(x) and the refinement was found to be unwarranted for the reaction. There is a close agreement between the values of kinetic parameters of the exothermic reaction of PSAN and RDX obtained from the Kissinger and Ozawa methods. "

Author Biographies

Suresh Mathew, Vikram Sarabhai Space Centre, Thiruvananthapuram
Dr Suresh Mathew received his MSc in Applied Chemistry from University of Cochin in 1984 andPhD in Chemistry from University of Kerala in 1992. He is the recipient of Alexander-von-Humboldt Fellowship for his post-doctoral research at Fraunhofer Institute fur Chemische Technologic,Karlsruhe, Germany (1993-94). He was also a Visiting Scientist at Propellant and Special Chemicals Group, Vikram Sarabhai Space Centre (VSSC), Thiruvananthapuram (1995-96). Presently, he isworking as a Scientific Officer at the Chemical Examiner's Laboratory, Thiruvananthapuram. He is amember of several scientific bodies and has 20 research publications including two patents.
K. Krishnan, Vikram Sarabhai Space Centre, Thiruvananthapuram
Vikram Sarabhai Space Centre, Thiruvananthapuram
K. N. Ninan, Vikram Sarabhai Space Centre, Thiruvananthapuram
Dr KN Ninan did his PhD in Chemistry from the University of Kerala. He joined VSSC in 1968. Heis presently Group Director, Propellants and Special Chemicals Group at VSSC. He has dydesignificant contributions in the development of propellants, polymers and chemicals required fkIndia's space research programmes. He is a member of several scientific and professional bodies and \has published about 200 research papers in nationallinternational journals. He was awarded theNetzch-ITAS Award-1987 for his outstanding contributions in the field of thermal analysis

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Published
2013-01-01
How to Cite
MathewS., KrishnanK., & NinanK. (2013). Effect of Energetic Materials on Thermal Decomposition of Phase-Stabilised Ammonium Nitrate - An Eco-Friendly Oxidiser. Defence Science Journal, 49(1), 65-69. https://doi.org/10.14429/dsj.49.3788
Section
Chemical Science & Technology

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