Non-thermal plasma conversion of methane to C2 hydrocarbons has been studied over the years as a low temperature oxygen free alternative to thermal and partial combustion methods. Various atmospheric discharge techniques, such as pulsed corona and spark discharges, dielectric barrier discharges (DBDs), microwave discharge have been employed for achieving an efficient methane conversion which is reflected by high selectivity for acetylene and low energy cost for production of acetylene. In general it has been found that higher energy density systems including high frequency pulsed corona, pulsed microwave and gliding arc discharges were rather more efficient for methane conversion to hydrogen and acetylene than DBDs and lower frequency pulsed and lower power density discharges. A literature review has been performed to reflect the progress made in terms of efficient conversion of methane to acetylene.
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