학술논문
NH3-SCR 탈질반응에서 N2O 생성 억제를 위한 Fe(Ox)-modified V2O5/TiO2 촉매 / Fe(Ox)-modified TiO2-supported V2O5–based catalysts for lowering N2O formation in the selective reduction
Document Type
Dissertation/ Thesis
Author
Source
Subject
Language
Korean
Abstract
A commercial V2O5-WO3/TiO2 catalyst (VWA) for deNOxing NH3-SCR reaction at power plants was modified by a physical mixing of the VWA and Fe-Zeolites impregnation of the commercial catalyst with other metal oxides and Fe2O3-promotion-TiO2. NH3-SCR, deNOx activity increased V2O5 contents at low temperature while N2O formation at high temperatures decreased. Metal oxide-promoted VWA catalysts, such as 1.08% MgO/VWA, 2.73% Fe2O3/VWA, 0.80% CeO/VWA and 0.76% La2O3/VWA disclosed significant reduction in N2O production levels compound to that with the original sample. During, NH3-TPD runs, Fe-ZSM-5 in SSI-VWA catalyst NO production at high temperature region. Catalysts physically mixed with VWA and Fe-ZSM-5 suppress N2O production at high temperature with a small loss of deNOx performances. A 2.73% Fe2O3-1.6% V2O5/promoted-TiO2 catalyst gave deNOxing activity similar to that of a VWA catalyst; however, N2O production could be visibly lowered.