The Influence of Small Additives of Alcohol Vapors on Combustion of Hydrogen and Methane in Air

V.V. Azatyan1, I.A. Bolodiyan2, S.N. Kopilov2, Yu.N. Shebeko2 and V.I. Kalachev1

1Institute of Structural Macrokinetics and Material Science, Russian Academy of Sciences, Chernogolovka, Moscow Region, 142432 Russia

2All–Russian Scientific Institute for Fire Protection VNIIPO 12, Balashikha, Moscow Region

Abstract

The results of investigation of combustion of hydrogen–air and methane–air mixtures in the presence of small additives of ethanol, isopropanol, propenol in horizontal tubes are presented. The additives reduce the upper limits of flame propagation and the rate of flame propagation. The difference of inhibiting efficiencies of these alcohols corresponds to their ability to break the reaction chains of hydrogen and methane combustion processes. In the mixtures, containing less than 15% of hydrogen the suppression of combustion does not occur.