Features of Combustion of Coal Gas Suspensions

  • Nickolai M. RubtsovEmail author
Part of the Heat and Mass Transfer book series (HMT)


It was shown that the gases evolving during thermal annealing of coal powder have an inhibiting effect on the ignition and combustion of hybrid gas suspension, containing natural gas. Investigation into flammability in oxygen of various types of coal with various content of volatiles at a total pressure of 85 Torr and initial temperatures in the range of  650–750 C has been performed. It is shown that ignition of separate particles of coal powder occurs right after injection of powder with oxygen without gas combustion. Then after an ignition delay the volatiles containing in a coal powder ignite, thus the ignition propagates over reactor volume. The more volatiles the coal powder contains the more intensive ignition is observed. It is shown that hybrid powder gas mixtures (PGM) consisting of soot or graphite powders which do not contain volatiles, and a stoichiometric mixture of natural gas and oxygen, intensively ignite in conditions in which hybrid PGM, consisting of coal powder, and a stoichiometric mixture of natural gas and oxygen, do not ignite. It is shown that unlike graphite, soot powder promotes ignition of a stoichiometric mixture of natural gas and oxygen. Possible scenarios of ignitions occurrence in the mines were analyzed. It is shown that hybrid PGM, consisting of soot powder and the stoichiometric mixture of natural gas and oxygen, intensively ignites in the absence of С10F18, however, in the presence of С10F18 combustion of natural gas is missing, the ignition of separate particles of soot powder is only observed.


Hybrid powder gas mixture Coal Mine Volatiles Natural gas Octadecafluorodecahydronaphthalene Soot Graphite 


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Copyright information

© Springer International Publishing Switzerland 2016

Authors and Affiliations

  1. 1.Russian Academy of SciencesInstitute of Structural Macrokinetics and Materials ScienceMoscowRussia

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