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Effective plasma discharge reforming of methane using warm non-equilibrium discharges

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. Currently there is significant renewed interest in this area as society seeks alternative sources of liquid fuels. The conversion of methane to ethylene and acetylene is one of the most inefficient intermediate steps of this process. Study of various discharge techniques and parameters to achieve high selectivity and low energy cost shows that higher energy density systems lead to the most efficient C2 yields. Most of these systems end up with coke as unwanted byproduct which in turn leads to unstable operation. With the aim of coke minimization and efficient conversion, we are investigating warm non-equilibrium discharge conditions (Tvib > Ttrans but still Ttrans ≈ 500-1000K.)