Structure of Ultrahigh Molecular Weight Polyethylene-Air Counterflow Flame
M. B. Gonchikzhapov1,2, A. A. Paletsky1, A. G. Tereshchenko1, I. K. Shundrina2,3, L. V. Kuibida1,2, A. G. Shmakov1,2, O. P. Korobeinichev1,4
1Voevodsky Institute of Chemical Kinetics and Combustion, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090 Russia
2Novosibirsk State University, Novosibirsk, 630090 Russia
3Vorozhtsov Novosibirsk Institute of Organic Chemistry, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090 Russia
4Far Eastern Federal University, Vladivostok, 690950 Russia
Keywords: сверхвысокомолекулярный полиэтилен, структура пламени, горение в противотоке, тяжелые углеводороды, моделирование, ultrahigh molecular weight polyethylene, flame structure, counterflow flame, heavy hydrocarbons, modeling
Abstract
The combustion of ultrahigh molecular weight polyethylene (UHMWPE) in airflow perpendicular to the polyethylene surface (counterflow flame) was studied in detail. The burning rate of pressed samples of UHMWPE was measured. The structure of the UHMWPE-air counterflow flame was first determined by mass spectrometric sampling taking into account heavy products. The composition of the main pyrolysis products was investigated by mass spectrometry, and the composition of heavy hydrocarbons (C7 – C25) in products sampled from the flame at a distance of 0.8 mm from the UHMWPE surface was analyzed by gas-liquid chromatography mass-spectrometry. The temperature and concentration profiles of eight species (N2, O2, CO2, CO, H2O, C3H6, C4H6, and C6H6) and a hypothetical species with an average molecular weight of 258.7 g/mol, which simulates more than 50 C7 – C25 hydrocarbons were measured. The structure of the diffusion flame of the model mixture of decomposition products of UHMWPE in air counterflow was simulated using the OPPDIF code from the CHEMKIN II software package. The simulation results are in good agreement with experimental data on combustion of UHMWPE.
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