TY - JOUR
T1 - Auto-ignition of a carbon-free aqueous ammonia/ammonium nitrate monofuel
T2 - A thermal and barometric analysis
AU - Mosevitzky, Bar
AU - Shter, Gennady E.
AU - Grader, Gideon S.
N1 - Publisher Copyright:
© 2017 Elsevier B.V.
PY - 2017
Y1 - 2017
N2 - A carbon-free aqueous solution of ammonium hydroxide and ammonium nitrate (AAN) was studied using differential thermal and barometric analyses under initial N2pressure of up to 4.6 MPa. The suggested nitrogen-based monofuel exhibited three distinct exothermic processes during heating. Their onset temperatures increased as the initial nitrogen pressure was raised. In addition, a higher extent of reaction was observed at high nitrogen pressures. This result was attributed to the effect of mass diffusion in the system, which decreased at higher pressures. Using a modified mechanism for the combustion of nitrogen-based fuels, the thermal ignition process was simulated. The resulting auto-ignition temperature values were shown to be in good agreement with experiments at initial nitrogen pressures of up to 2.3 MPa. Above this pressure, the agreement between experimental and model results was hampered by mass diffusion effects. Using the modified mechanism, the main chemical pathways prior to auto-ignition of AAN were identified and the reactions leading to ignition were discussed. This paper presents for the first time the auto-ignition of AAN and explores the combustion chemistry of this carbon-free monofuel.
AB - A carbon-free aqueous solution of ammonium hydroxide and ammonium nitrate (AAN) was studied using differential thermal and barometric analyses under initial N2pressure of up to 4.6 MPa. The suggested nitrogen-based monofuel exhibited three distinct exothermic processes during heating. Their onset temperatures increased as the initial nitrogen pressure was raised. In addition, a higher extent of reaction was observed at high nitrogen pressures. This result was attributed to the effect of mass diffusion in the system, which decreased at higher pressures. Using a modified mechanism for the combustion of nitrogen-based fuels, the thermal ignition process was simulated. The resulting auto-ignition temperature values were shown to be in good agreement with experiments at initial nitrogen pressures of up to 2.3 MPa. Above this pressure, the agreement between experimental and model results was hampered by mass diffusion effects. Using the modified mechanism, the main chemical pathways prior to auto-ignition of AAN were identified and the reactions leading to ignition were discussed. This paper presents for the first time the auto-ignition of AAN and explores the combustion chemistry of this carbon-free monofuel.
KW - Differential barometric analysis
KW - Differential thermal analysis
KW - Monofuel
KW - Nitrogen-based alternative fuel
KW - Reaction mechanisms
UR - http://www.scopus.com/inward/record.url?scp=85012085371&partnerID=8YFLogxK
U2 - 10.1016/j.fuproc.2017.01.047
DO - 10.1016/j.fuproc.2017.01.047
M3 - Article
AN - SCOPUS:85012085371
SN - 0378-3820
VL - 159
SP - 363
EP - 368
JO - Fuel Processing Technology
JF - Fuel Processing Technology
ER -