Park, Eunseuk Kim, Minsoo Jung, Hyounduk Chin, Sungmin Jurng, Jongsoo 2024-01-20T12:02:59Z 2024-01-20T12:02:59Z 2021-09-05 2013-07 2155-5435 https://pubs.kist.re.kr/handle/201004/127922 Mn/Ti catalysts prepared through impregnation of manganese acetate and a manganese nitrate precursor via the chemical vapor condensation (CVC) method were investigated in this study to assess NH3-selective catalytic reduction (SCR) activity. Manganese (Mn) loaded on a synthesized TiO2 catalyst showed good low-temperature NO reduction activity and better resistance to sulfur poisoning in presence of SO2. Mn loaded on synthesized TiO2 prepared from manganese acetate precursor especially exhibited a high NO conversion of 98.4% at 150 degrees C. Moreover, it presented high NO conversions within the entire operating temperature window in comparison with other catalysts, which may be attributed to smaller,,. particle size, scattered amorphous Mn over the catalyst surface, higher dispersion, and an abundant Mn2O3 phase. X-ray photoelectron spectroscopy (XPS) analysis of the spent catalyst following the SCR reaction in presence of SO2 verified that the formation of sulfated titanium and manganese sulfate was significantly inhibited, and that the deposition concentration of ammonium sulfate on active sites was low owing to impregnation of Mn acetate onto synthesized TiO2. FT-IR analysis indicated that the catalyst also contained larger quantities of N-H bonds in NH3, synchronizing with Lewis acid sites on its surface. English AMER CHEMICAL SOC OXIDE CATALYSTS MODIFIED MNOX/TIO2 NH3 SCR SURFACE OXIDATION TIO2 PRECURSORS CRYSTALLINITY DECOMPOSITION Effect of Sulfur on Mn/Ti Catalysts Prepared Using Chemical Vapor Condensation (CVC) for Low-Temperature NO Reduction Article 10.1021/cs3007846 1 ACS CATALYSIS, v.3, no.7, pp.1518 - 1525 ACS CATALYSIS 3 7 1518 1525 scie scopus 000321606100011 2-s2.0-84879896368 Chemistry, Physical Chemistry Article OXIDE CATALYSTS MODIFIED MNOX/TIO2 NH3 SCR SURFACE OXIDATION TIO2 PRECURSORS CRYSTALLINITY DECOMPOSITION Mn/Ti chemical vapor condensation NO reduction SO2 poisoning low-temperature