Jeong, Young Eun Kumar, Pullur Anil Huong, Danh Thi Ha, Heon Phil Lee, Kwan-Young 2024-01-20T01:03:29Z 2024-01-20T01:03:29Z 2021-09-05 2017-07 1022-5528 https://pubs.kist.re.kr/handle/201004/122569 In this study, the NOx conversion under standard and fast SCR conditions on the Sb-V-CeO2/TiO2 catalyst has been conducted in the temperature range of 150-400 degrees C. The Sb-V-CeO2/TiO2 catalyst, under both fast and standard NH3-SCR conditions, showed higher NOx conversion than the commercial V2O5/WO3-TiO2 catalyst at low temperatures. In comparison to the V2O5/WO3-TiO2 catalyst, the NO oxidation to NO2 was promoted for the Sb-V-CeO2/TiO2 catalyst at the temperatures between 150 and 400 degrees C. The in-situ DRIFTS studies at 200 degrees C on the Sb-V-CeO2/TiO2 catalyst surface indicated the IR bands assigned to NO2, nitrate species and ammonia adsorbed species assigned to Bronsted and Lewis acid sites under both standard and fast SCR conditions. Furthermore, in-situ DRIFTS results of Sb-V-CeO2/TiO2 catalyst revealed that the formation of surface adsorbed NO2, bridged nitrate and bidentate nitrate species. The reduction of nitrates to nitrites is induced by NO2, which reacts with the adsorbed ammonium species forming intermediate NH4NO2. Eventually, this is converted to N-2 and H2O in both SCR conditions. English SPRINGER/PLENUM PUBLISHERS FAST SCR REACTION LOW-TEMPERATURES NITRIC-OXIDE SO2 RESISTANCE REDUCTION NH3 NOX AMMONIA MECHANISM ENHANCEMENT In situ-DRIFTS Study of Sb-V-CeO2/TiO2 Catalyst Under Standard and Fast NH3-SCR Conditions Article 10.1007/s11244-017-0784-2 1 TOPICS IN CATALYSIS, v.60, no.9-11, pp.755 - 762 TOPICS IN CATALYSIS 60 9-11 755 762 scie scopus 000405850200017 2-s2.0-85018481117 Chemistry, Applied Chemistry, Physical Chemistry Article; Proceedings Paper FAST SCR REACTION LOW-TEMPERATURES NITRIC-OXIDE SO2 RESISTANCE REDUCTION NH3 NOX AMMONIA MECHANISM ENHANCEMENT NO oxidation In-situ DRIFTS Fast and standard SCR conditions Nitrate species Low temperature