Limiting Oxygen Concentration and Minimum Inert Concentration of Fuel-air-inert Gaseous Mixtures Evaluation by means of Adiabatic Flame Temperatures and Measured Fuel-air Lower Flammability Limits

作者：Giurcan Venera; Razus Domnina^*; Mitu Maria; Schroeder Volkmar

来源：Revista de Chimie, 2013, 64(12): 1445-1453.

• fuel
• limiting oxygen concentration
• minimum inert concentration
• adiabatic flame temperature
• flammability limit

The present paper aims to re-examine the validity of the linear correlation found between AFT(LOC), the adiabatic flame temperature at the apex of the flammability range of fuel-air-inert mixtures (where LOC, the Limiting Oxygen Concentration, is measured) and AFT(LFL), the adiabatic flame temperature at the lower flammability limit of fuel-air mixtures (LFL). New sets of experimental measurements of LFL and LOG referring to fuel-air mixtures diluted with N-2, CO2 and H2O(vap) from trusted literature sources form a comprehensive database for such evaluation. Both the slope and intercept of correlations AFT(LOC) = a + b*AFT(LFL) are dependent on the nature of inert gas and on initial temperature. Based on the linear correlation between AFT(LOC) and AFT(LFL), a procedure for calculation of LOC and MIC (Minimum Inert Concentration) of fuel-air-inert mixtures is presented, using measured or calculated LFL of fuel-air mixtures and their corresponding AFT The method predicts with reasonable accuracy LOG and MIC of fuel-air-inert mixtures (relative deviations ranging between -14 and +17% when calculated and measured LOC and MIC for fuel-air-nitrogen and fuel-air-carbon dioxide at ambient initial conditions are examined).

• 出版日期2013-12