| 초록 |
During the last decade, nitrous oxide (N2O) has more severe effect on greenhouse effect by 300 times than that of CO2. The formation of N2O has been observed in the selective catalytic reduction (SCR) system as a function of side reaction. In this study, we aimed at finding the proper promoter of V2O5/TiO2 catalyst which can suppress N2O formation during SCR reaction. 5 wt% V2O5/TiO2 catalyst was prepared by applying wet impregnation method using vanadium precursor with V3+ state. We utilized various promoters, such as W, Zr, Zn Ga, Mo, Mn, Cr and Ce with 3 wt% loading on catalyst. Also, we changed the order of impregnation between vanadium and promoter as promoter first, vanadium first and co-impregnation. It was found that V2O5/TiO2 with Mn, Zr and Zn promoter produced the least amount of N2O at 400oC compared with W and Mo promoter used catalysts. In addition, impregnating vanadium first then promoter later showed the least production of N2O during SCR reaction. We utilized BET, ICP, XRD, and H2-TPR to investigate the physicochemical properties of V2O5/TiO2 catalysts with various promoters. |
