Extrapolation of Experimental Data on Methane Pyrolysis to Optimal Conditions for Hydrogen and Ethylene Production

Data on non-catalytic pipe pyrolysis of methane are considered. The parameters of kinetic equations are given, which ensure coincidence with the data in a wide range of temperatures (up to 1600 0C) and pressures (up to 30 atm). The equations of gas dynamics and energy are formulated, solutions of the equations of pipe pyrolysisare given for various methods of heat flow supply to the tube wall. The cases of setting a linear density of thermal power on the surface of a pyrolysis pipe obtained due to the radiation of gas burners or electric heating elements are considered. The limiting possibilities of pipe pyrolysis of methane for the production of hydrogen and ethylene as the main products are shown. The energy consumption of the proposed and known options is comparedon the example of the problem of obtaining hydrogen for the urban ecotransport of Moscow.