Study on the Application of CuO/Al2O3 Cordierite Ceramic Honeycomb Catalyst in Cleaning the Flue Gas for NOX

摘要

This paper introduces the current research status of denitration catalysts used in Selective Catalytic Reduction(SCR) technology, and assess the effects of a composite catalyst on the denitration performance of fluegas. Laboratory experiments were conducted to prepare a new composite catalyst, that is, CuO loaded on ahoneycomb cordierite ceramic catalyst carrier with Al 2 O 3 coating by the equivalent volume impregnationmethod. The orthogonal designed tests were used to study the effects on denitration performance causedby the changes of Al 2 O 3 loading, calcination temperature and calcination time, obtain the optimum conditionfor the catalyst carrier preparation with the best denitration rate. Then the effects of CuO loading, calcinationtemperature and calcination time on denitration rate of the new composite catalyst were investigated. Resultsshowed that: (1) As for catalyst carrier, significance of three factors that had effects on the flue gas denitrationrate was in a sequence: loading of Al 2 O 3 > calcination temperature > calcination time. (2) Calcined at 600°Cfor 4 hours with 3% of Al 2 O 3 loading was the condition to prepare the composite carrier with the best denitrationrate. (3) For the new composite catalyst, three noticeable increased-then-decreased trends of denitrationrate change were presented with the increasing CuO loading, calcination temperature and calcination time.(4) Calcined at 450 o C for 4 hours with 8% CuO loading was the condition to prepare the new compositecatalyst with the best denitration rate.