掺杂六铝酸盐上甲烷催化燃烧性能研究

s an environment-friendly way of energy utilization，catalytic combustion is attracting increasingly attention due to its high combustion efficiency , low emission of air pollutants and unburned hydrocarbons. Catalytic combustion is an effective way to suppress the emission of nitrogen oxide from combustors. This potential application in energy generation industry has attracted many research interests in recent decades. Hexaaluminates are considered to be one of the most suitable materials for high-temperature catalytic combustion of methane because of their unique crystal structure. With co-precipitation method adopted, hexaaluminate catalyst CeCoAl11O19 was prepared, the influence of different calcination temperature and the metallic ion substitution to its catalytic combustion on the activity was studied, and the catalyst activity was tested. The research indicates that the hexaaluminate without doped any transition metal is of no catalytic activity, after metal ion adding, the catalytic activity may enhance obviously. The hexaaluminate catalyst calcined after 1200℃ shows good catalytic activity. As different metallic ion substitution, because the Mn2+ radius is quite close to the Al3+, it is easy to enter hexaaluminate skeletons and to promote hexaaluminate formations, therefore the catalyst doped Mn2+ presents a higher catalytic activity.