Research on direct decomposition of NO by microwave catalysis under condition of sintering flue gas
It is a great challenge to realize direct decomposition of NO at low temperature and high efficiency under complex sintering flue gas conditions.A CeO2/MgCo2O4-40％ BaCO3 catalyst is developed for the efficient direct decomposition of NO in microwave catalysis under the condition of low temperature with excess O2 and some SO2 and CO2,and then the denitration performance and sulfur resistance of the catalyst are investigated.XRD and TEM characterization are used to analyze the catalyst deactivation and the reasons for the improvement of the deactivation after modification.The results show that the denitrification rate of the microwave catalyst is almost stable when the volume fraction of CO2 in the inlet gas is 5％.After CeO2 is introduced,the sulfur resistance of the microwave catalyst is obviously improved.Under the atmosphere of 0.1％SO2 volume fraction and the reaction temperature is only 250℃,the microwave catalyst could achieve 99.9％NO conversion and 99.9％N2 selectivity.TEM results show that there is no obvious difference in the topography features of the catalyst before and after the reaction.The new denitration method of direct decomposition of NO by microwave catalysis established in this paper can provide a new way for green deep denitration under complex sintering flue gas condition.
direct decomposition of NOmicrowave catalysisCeO2/MgCo2O4-40％ BaCO3denitration performancesulfur resistancecarbon dioxide resistance
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