Bi-reforming with a ratio of CH4/CO2/H2O = 3/1/2 by gliding arc plasma catalysis for power to fuels

Abstract

With the aim of directly producing a high-quality syngas with a ratio of H2/CO = 2, bi-reforming of CH4 with the ideal stoichiometric ratio of CH4/CO2/H2O = 3/1/2 is carried out in a gliding arc-based warm plasma catalytic reactor. The gliding arc plasma is a typical warm plasma (WP), which provides favorable conditions for CO2 activation, and it is found that the highest conversions are obtained in the case of reaction using the WP alone. A comparison of reactions using the WP alone (the WP case), the conventional catalyst alone (the CC case), and the WP plus catalyst (the WPC case) reveals that the WPC case can overcome the disadvantages of both the WP and CC cases. In the WPC case, CH4, CO2, and H2O react at the ideal stoichiometric ratio of CH4/CO2/H2O = 3/1/2. In addition, higher reactant conversions and energy efficiencies are obtained in the WPC case than in the WP case. A high-quality syngas with H2/CO = 2 is obtained, with similar conversions of (89 ± 1)% for all of CH4, CO2, and H2O and an energy efficiency of 71%.