Study on methane selective catalytic reduction of NO on Pt/Ce 0.67Zr 0.33O 2 and its application

Abstract

Monolithic catalysts of Pt/La-Al 2O 3 and Pt/Ce 0.67Zr 0.33O 2 were prepared to investigate methane selective catalytic reduction (SCR) of NO. The results indicate that Pt/Ce 0.67Zr 0.33O 2 shows high activity and both NO and CH 4 can be converted completely at 450 °C. Meanwhile, NO and CH 4 can be converted completely when there exists excess oxygen. The Pt/Ce 0.67Zr 0.33O 2 catalyst were further investigated by using methane as reducing agent to SCR NO in a novel equipment which combined the CH 4 selective catalytic reduction of NO with methane combustion. The result shows that the catalyst is high active and the novel equipment is very effective. The conversion of NO is above 92% under the conditions used in this work. The prepared burner and catalysts have great potential for application.