| 초록 |
The extent of N2O formation during the selective reduction of NOx by NH3 over commercial 1.41% V2O5-7.98% WO3/TiO2 catalysts for an oil-fired power plant has been determined using an on-line IR-based system coupled with a modified White cell. A fresh sample of the commercial catalyst gave no N2O formation in the NH3-SCR deNOx reaction up to 450°C but did 15 ppm N2O formation at higher temperatures, such as 480°C. 10 - 160 ppm N2O, depending significantly on SCR temperatures, was produced with a sample of the catalyst that had been used for 20,000 h at a domestic oil-fired power plant. This was primarily associated with an increase in V2O5 amounts after such on-site use, in addition to the presence of some alien metal oxides such as Fe, Ni, Nb and Mo which might also play a role for the N2O production. |
