Influence of surface state and chemically active additives on ignition of powder-gas mixture containing coal powder, natural gas and oxygen
It has been shown that at (650÷750) ºС coal coating of reactor surface influences markedly on ignition of hybrid powder-gas mixture, because under thermal treatment coal evolves effective inhibitor of methane combustion, probably, a polycyclic aromatic hydrocarbon. It has been established that hybrid powder-gas mixtures, containing coal powder and stoichiometric matural gas-oxygen mixture do not burn over coal coating. In has been shown that in the contion of the experiment the ignition of the powder-gas mixture can be promoted with small amounts of a chemically active additive (<i>e.g.</i>, dichlorosilane).