Experimental Investigation of the Formation of Polyaromatic Hydrocarbons and Soot during Pyrolysis of Ethylene with Additives of Dimethyl, Diethyl Ether, and Dimethoxymethane
A. V. Drakon1, A. V. Eremin1, V. N. Zolotarenko2,3, M. R. Korshunova1, E. Yu. Mikheeva2,3
1Joint Institute for High Temperatures, Russian Academy of Sciences, Moscow, 125412 Russia
2Joint Institute for High Temperatures, Russian Academy of Sciences, Moscow, 105005 Russsia
3Bauman Moscow State Technical University
Keywords: PAHs, carbon nanoparticles, shock tube, pyrolysis ethylene, linear ethers, biofuel, LIF
Abstract
This paper presents the results of studies of the formation of polyaromatic hydrocarbons (PAHs) and carbon nanoparticles during pyrolysis of mixtures of ethylene with additives of linear ethers: dimethyl ether CH3OCH3 (DME), diethyl ether C2H5OC2H5 (DEE) and dimethoxymethane CH3OCH2OCH3 (DMM). The studies were carried out behind reflected shock waves at temperatures of 1650-2550 K and pressures of 2.7-4.1 atm using optical diagnostic methods: laser-induced fluorescence (LIF) and laser extinction. These additives were found to accelerate the formation of PAHs and carbon nanoparticles. Kinetic modeling results show that this effect is due to the presence of methyl and ethyl groups in the molecules, which promote the formation of PAHs and soot.
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