Methane conversion to C2 hydrocarbons and hydrogen in atmospheric non-thermal plasmas generated by different electric discharge techniques

Effect of Coexistent Hydrogen on the Selective Production of Ethane by Dehydrogenative Methane Coupling through Dielectric-Barrier Discharge under Ordinary Pressure at an Ambient Temperature

“…In our previous report [16], the methane conversion is limited to 9.5%, but the main product is ethane (nearly 60%) followed by propane (around 20%). The distributions of these main products by DBD are also similar values to the other reports [9][10][11][12][13][14][15], improving the methane conversion by use of catalysts, although the increase of C 2 selectivities has been limited by ca. 20%.…”

“…Subsequently, intensive investigations on dehydrogenative (nonoxidative) coupling of methane have been conducted in atmospheric nonthermal plasmas generated by spark discharge or dieletric-barrier discharge (DBD) without catalysts [9][10][11] and by DBD with special catalysts [12][13][14][15]. Ethane is the main product of these methane activation techniques, and the selectivity was as much as 60%, accompanying unsaturated and C3+ hydrocarbons.…”

Experimental analysis of direct thermal methane cracking

“…There are some methods to carry it out [14][15][16][17][18][19][20]. As already said, some of them use a catalyst, which reduces the working temperature below 1000 K, but it conveys other problems, particularly catalyst deactivation (because of carbon deposition, mainly).…”

Carbon dioxide reforming of methane in kilohertz spark‐discharge plasma at atmospheric pressure

“…11-14, appear to be good indicators to quantify plasma reforming systems, but their experimental results among different conditions or plasma processes can only be compared in the same range of reactant conversion. 18,27 As a result, EC and fuel-production efficiency as functions of CH 4 , CO 2 , and total-carbon conversions at various CO 2 /CH 4 ratios are illustrated in Figures 3a, b, respectively. At the same CO 2 /CH 4 ratio, EC increased and fuel-production efficiency decreased with reactant conversion.…”