Chemistry for Sustainable Development 21 (2013) 8390 83 Effect of Reaction Conditions on the Formation of the Products of Oxidative Pyrolysis of Methane on the Resistive Fechral Catalyst

Abstract

Abstract The effect of reaction conditions (methane concentration, flow rate, catalyst position, gas dyn amic mode) on methane pyrolysis within temperature range 7001200°Ñ on preliminarily annealed Fechral wire heated with electric current, at a ratio ÑÍ 4 /Î 2 = 15 : 1 was investigated. It was shown that independently of conditions the process runs in two temperature regions differing in the selectivity of the formation of major products Ñ 2 hydrocarbons. Reaction conditions have a substantial effect on methane conversion and selectivity with respect to reaction products. The maximal selectivity with respect to Ñ 2 products can be achieved with the transversal coil position to the gas flow and with the use of flow-circulation set-up instead of flow one. An increase in methane concentration in the initial mixture has ambiguous effect on the selectivity with respect to Ñ 2 hydrocarbons within different temperature ranges: for temperature not higher than 1000°Ñ, this causes an increase in selectivity with respect to ethylene and acetylene, while at 1000°Ñ and above this causes a decrease in selectivity with respect to these components