Study on the operating range for syngas production by oxidation dry reforming of biogas

This study investigated syngas (H
₂
+CO) production by oxidation dry reforming of biogas, and its operating range was discovered. In order to describe the characteristics of MDR (Methane Dry Reforming) and ODR (Oxidation Dry Reforming), the chemical equilibrium calculation and analysis were performed using the minimum of Gibbs free energy. The main parameters settings are CO
₂
/CH
₄
ratio between 0.1-1.5, and O
₂
/CH
₄
ratio between 0.1-0.6. The equilibrium calculations were conducted with various parameters to reveal the produced components, and carbon formation. Therefore, the results could reveal and avoid carbon formation in experiments. Due to the DR (Dry reforming) reactions are endothermic, thus, an additional oxygen supply in reforming reactions could cause heat release in oxidation reaction. The heat release in oxidation reaction was utilized as the energy source for DR. Whereas, O
₂
/CH
₄
ratio should be well selected because over high settings would cause oxidation of fuel and thus decrease in syngas production.