Optimized CeZrO2-Modification of the Metal-Foam-Coated Pd- Rh/Al2O3 Catalyst for CH4 Bi-Reforming Reaction

摘要

Reforming of biogas by steam to syn gas is important for viable conversion of renewable energy resources because biogas consists primarily of the most simple and inexpensive hydrocarbon (CH4) and the most stable carbon oxide (CO2), both of which are major greenhouse gases. Steam-reforming of biogas is considered to be more beneficial than CO2 (dry)-reforming of biogas, for steam is a reforming reagent that can alleviate catalyst fouling caused by carbon deposition which tends to be aggravated in dry reforming environment. To optimize the reaction condition and catalyst for steam-reforming of biogas will be more systematic if it is performed in the context of CH4 bi-reforming, i. e., reforming of CH4 in the presence of two reagents, carbon dioxide and steam. Some of our previous works on CH4 bireforming have been performed for developing the process operating condition over the nano-scale, active and stable Pd-Rh catalyst supported on CeZrO2-modified Al2O3that is coated on a metal foam substrate designed to fit SOFC fuel processor application.