the catalyst bed (Fig. 3b) and, thereby, the reduced endothermic
reaction of dry reforming. This behavior can also be explained by Le
Chatelier’s principle. More CO2 added into the reactants is
conducive to the forward reaction of dry reforming; however,
relatively less CO2 percentage is converted into CO. Despite the
decrease in CO2 conversion, more CO is generated when the CO2/O2
ratio increases until it is larger than 1.4 (Fig. 4a).