Pressure effect on the combustion of aqueous urea ammonium nitrate alternative fuel

Alon Grinberg Dana, Gal Tvil, Lea Winter, Gennady E. Shter, Gideon S. Grader

Research output: Contribution to journalArticlepeer-review


Differential Thermal Analysis (DTA) and Differential Barometric Analysis (DBA) were used to study the combustion of aqueous urea ammonium nitrate alternative fuel, a low carbon nitrogen-based hydrogen storage medium, under varied pressures (up to 27 MPa) in a constant volume analyzer. The thermal processes governing the fuel combustion under applied pressure were investigated at elevated temperatures (up to 500°C). Three distinct exothermic effects were observed during reaction, and all three shifted towards higher temperatures with increased pressure. A change in combustion mechanism was suggested to occur at 5 MPa, and the calculated activation energy of the low pressure region (P < 5 MPa) was 209 kJ mol-1, in agreement with the literature value for radical ammonium nitrate decomposition. Deduction of the reaction pathway is crucial for a basic understanding of the fuel's combustion mechanism.

Original languageEnglish
Pages (from-to)500-507
Number of pages8
StatePublished - 17 Jul 2015


  • Chemical hydrogen storage
  • Differential Barometric Analysis
  • Differential Thermal Analysis
  • Nitrogen-based alternative fuel
  • Reaction mechanisms

All Science Journal Classification (ASJC) codes

  • General Chemical Engineering
  • Energy Engineering and Power Technology
  • Fuel Technology
  • Organic Chemistry


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