Lee, Kyung Ju Rao, Komateedi N. Yu, Chang Yong Hong, Suk In Ha, Heon Phil 2024-01-20T12:34:55Z 2024-01-20T12:34:55Z 2022-01-25 2013-03 0922-6168 https://pubs.kist.re.kr/handle/201004/128269 This paper characterizes the integrated activity of fresh and used catalysts on the selective catalytic reduction of NOx using CH4. The synthesised K-Ag/Al2O3 catalysts exhibited a promotional effect on deNOx activity in the presence of SO2. In addition, 130 h of time-on-stream reactions demonstrated the thermal and mechanical stability of the synthesised materials. A TEM analysis and diffraction patterns demonstrated the sintering of finely dispersed particles to similar to 0.5 micron size clusters by sulphation. Furthermore, under reaction conditions, the de-sulphation initiated the re-dispersion of the Ag clusters to different sized particles. The TPD studied demonstrated the strong adsorption sites for methane and formation of R-SOx compounds. This surface modification in the SO2 feed stream is considered to be the reason for the promotional effect on the deNOx reaction. English SPRINGER Synthesis and characterisation of K-Ag/Al2O3 catalysts for CH4-SCR of NOx: effect of SO2 Article 10.1007/s11164-012-0704-9 1 RESEARCH ON CHEMICAL INTERMEDIATES, v.39, no.3, pp.1463 - 1479 RESEARCH ON CHEMICAL INTERMEDIATES 39 3 1463 1479 N scie scopus 000316008300058 2-s2.0-84876464274 Chemistry, Multidisciplinary Chemistry Review IN-SITU FTIR SELECTIVE REDUCTION AG/AL2O3 CATALYST SILVER-ALUMINA SCR METHANE AG TOLERANCE HYDROGEN HYDROCARBONS Ag/Al2O3 catalysts SO2 influence Redispersion R-SOx SCR of NOx Methane