Experimental Study for Partial Oxidation Reforming of CH₄/CO₂ With Rich Combustion in a Porous Media Burner

Rich combustion in a porous media burner was used for the partial oxidation reforming of CH₄/CO₂, which is a potential non-catalysis way for syngas production from biomass-derived gas. The effect of CO₂ injected in methane was studied in the experiment. As the inlet air flow rate was 5 L/min, for various inlet CO₂/CH₄ and equivalence ratios, the flammability of rich combustion in the porous media was determined. Within the flame stability limit, the temperature distributions and species profiles were measured. When the equivalence ratio was 1.3, the ratio of CO₂/CH₄ reached 1.5. As the equivalence ratio was 1.6 and the ratio of CO₂/CH₄ was 0.5, the reforming efficiency reached 47.7%. With the injection of CO₂ in the fuel, the inverse process of water gas shift reaction was promoted that increased the fuel reforming efficiency, meanwhile, the net emission of CO₂ was reduced.