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

Aiming at understanding the role of CH4/CO2 ratio on gliding arc (GA)-based dry reforming of methane (GA-DRM), the GA-DRM at CH4/CO2 ratio range of 0.11 to 1 was studied with kinetics simulation. The radicals of H, OH, and CH3 are identified as the main reactive species to induce the reactant conversion and product formation in GA-DRM. The increase of CH4/CO2 raises the concentrations of H and CH3 and reduces the OH concentration. Subsequently, the CH4/CO2 ratio regulates the main reaction routes of GA-DRM. The dehydrogenation coupling reaction enhances with CH4/CO2 and thus raises the selectivities of C2 hydrocarbons. The OH-induced reactions for OH to H2O weaken with CH4/CO2, thereby increasing the H-2 selectivity.

Automated summary

This study investigates the role of CH4/CO2 ratio on gliding arc-based dry reforming of methane (GA-DRM) through kinetic simulation. The results show that the CH4/CO2 ratio regulates the main reaction pathways and product selectivities in GA-DRM.