Abstract: A Co3O4-Fe2O3-MnO2 monolithic catalyst supported on a mixture of yttria-stabilized zirconia (YSZ)-Al2O3 and La-modified CeO2-ZrO2 oxygen storage material was prepared. The catalyst activity for methane combustion was measured in a microreactor, and a domestic natural gas premixed catalytic combustion fan-boiler prototype was developed on the basis of this methane combustion catalyst system. The monolithic catalyst has high activity and good thermal stability, and the natural gas premixed catalytic fan-boiler has the advantages of high thermal efficiency and low CO and NOx emissions. Hence it is an energy saving and environmentally friendly product with high efficiency.

Key words: cobalt oxide, iron oxide, manganese oxide, monolithic catalyst, methane, catalytic combustion, domestic natural gas premixed catalytic combustion fan-boiler