Mechanism study on gliding arc (GA) plasma reforming: Unraveling the decisive role of CH4/CO2 ratio in the dry reforming reaction

Abstract Aiming at understanding the role of CH 4 /CO 2 ratio on gliding arc (GA)‐based dry reforming of methane (GA‐DRM), the GA‐DRM at CH 4 /CO 2 ratio range of 0.11 to 1 was studied with kinetics simulation. The radicals of H, OH, and CH 3 are identified as the main reactive species to induce the reactant conversion and product formation in GA‐DRM. The increase of CH 4 /CO 2 raises the concentrations of H and CH 3 and reduces the OH concentration. Subsequently, the CH 4 /CO 2 ratio regulates the main reaction routes of GA‐DRM. The dehydrogenation coupling reaction enhances with CH 4 /CO 2 and thus raises the selectivities of C2 hydrocarbons. The OH‐induced reactions for OH to H 2 O weaken with CH 4 /CO 2 , thereby increasing the H 2 selectivity.