Catalysts for methane combustion were prepared by Fe supported on γ-Al2O3?ZrO2-Al2O3?YSZ-Al2O3,respectively.The results indicated that among these three kinds of catalysts Fe2O3/YSZ-Al2O3 has showed the highest activity and best thermal stability.The XPS results demonstrated that the addition of ZrO2 and Y2O3 can decrease the interaction between iron species and γ-Al2O3 support,and prevent Al2O3 transmitting to the surface of catalyst.
Catalysts for methane combustion were prepared by iron,cobalt and manganese oxides as active components.The catalysts showed high activity,good thermal stability and similar character to noble metal catalysts.The high activity was kept after aging at 1000℃ for 5h.Preparation methods thus ensued had great effect on catalytic activity and thermal stability.
Some fundamental research work was conducted on the performance of the catalytic combustion water heater for household utilization and the activity of its combustion catalysts.We mainly changed the structure of current household nature gas water heaters and the method of the combustion.In the research work,the technique of catalytic combustion was applied,and the results show that the advantages offered by the catalytic combustor is that catalytic combustion can be carried out over a wide range of fuel concentrations in air and at low temperature.Moreover,NOx emission is much lower than that of conventional combustors,making use of fuel energy environmentally and efficiently.
