Low–Temperature Autoignition of Binary Mixtures of Methane with Alkanes С3–С5
K. Ya. Troshin1,2, A. V. Nikitin1, A. A. Borisov1,2, V. S. Arutyunov1
1Semenov Institute of Chemical Physics, Russian Academy of Sciences, 119991 Russia
2MEPI National Research Nuclear University, Moscow, 115409 Russia
Keywords: природный газ, попутный газ, метан, пропан, пентан, алканы, самовоспламенение, задержка самовоспламенения, natural gas, associated gas, methane, propane, pentane, alkanes, autoignition, autoignition delay
Abstract
The influence of alkanes С3–С5 on the ignition of their binary mixtures with methane in air at a temperature 523–1000 K and a pressure of 1 atm is studied. It is shown that the presence of only 1% alkanes С3–С5 considerably reduces the ignition delay of methane. At a concentration of 10–20%, the ignition delay practically corresponds to the autoignition delay of the added alkane. The effect of additives of heavy alkanes becomes less noticeable with increasing initial temperature. These results can be used to estimate the permissible content of the C5+ heavy species in the gas turbine engine fuel at which their influence on the fuel knock resistance is sufficiently low. It is only 0.5%.
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