Promotion and inhibition of the combustion of methane in oxidative gases with various oxygen concentrations by fluorinated hydrocarbons

摘要: Experimental data on the combustion characteristics of methane-oxidative gas (O2 + N2)-inhibitor (CHF3, C2HF5, and C4F10) mixtures an analysis thereof show that fluorinated hydrocarbons (HFC FC) exhibit properties both flame inhibitors promoters. The flammability concentration limits, maximum explosion pressure ΔP max, rise rate (dP/dt)max, laminar speed S u are measured for near-limit gas-fluorinated hydrocarbon mixtures. It is demonstrated that, when added to lean mixtures, HFC FC behave as additional fuel. Calculations thermodynamic reactions involving capable acting inhibitor oxidizer such have significant heat effects, 150–700 kJ/mol, with respective adiabatic temperatures being high 900–1800 K. results present study suggest procedure selecting practical applications fire suppressants should include careful tests their promoting effect.