Synthesis of Mesoporous Composite Oxides for the Catalysis of NH_3-SCR

A novel mesoporous Zr O2-Ti O2(ZT) based multi-component composite oxide catalyst V2O5-WO3-Cu OAl2O3/Zr O2-Ti O2(VWCu Al/ZT) was successfully synthesized by one-pot hydrothermal method using both Brij-35 and P123 as composite template. The results indicated that the active species of V2O5, WO3, Cu O and Al2O3 could be homogeneously dispersed into mesoporous Zr O2-Ti O2 catalyst carrier. Compared with the reference samples of non-mesoporous I-VWCu Al/ZT and the traditional commercial catalyst V2O5-WO3/Ti O2(V-W/Ti), the prepared VWCu Al/ZT showed a superior low-temperature catalytic activity and high stability over the reaction of NH3-SCR of NO, especially high catalytic efficacy for NO reduction within a wide temperature range of between 200℃ to 500℃.