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The important role of reactions between atoms and radicals in flame propagation in cylinder reactors

  • Chemical Kinetics and Catalysis
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Abstract

Results from studying features of the combustion of hydrogen in narrow cylinder reactors with diameters of <5.0 cm are presented. It is determined that the lower concentration limit of flame propagation in a reactor with a diameter of 1.1 cm is higher than 9% H2. The dependence of the principles of combustion on the method of initiation is studied. Mathematical simulations are performed that prove the impossibility of describing the combustion of hydrogen-deficient mixtures without assuming the cell structure of a flame. It is experimentally determined that increasing the termination of chains during the propagation of a flame results in its attenuation. It is noted that in addition to conductive heat abstraction, the recombination of atoms and radicals on the surface of the reactor plays an important role. It is concluded that these heterogeneous reactions representing the termination of reaction chains also result in the removal of recombination energy by the reactor’s walls.

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Correspondence to V. V. Azatyan.

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Original Russian Text © V.V. Azatyan, S.K. Abramov, A.A. Borisov, V.M. Prokopenko, N.V. Chapysheva, 2013, published in Zhurnal Fizicheskoi Khimii, 2013, Vol. 87, No. 3, pp. 409–413.

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Azatyan, V.V., Abramov, S.K., Borisov, A.A. et al. The important role of reactions between atoms and radicals in flame propagation in cylinder reactors. Russ. J. Phys. Chem. 87, 388–392 (2013). https://doi.org/10.1134/S0036024413030047

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  • DOI: https://doi.org/10.1134/S0036024413030047

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