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http://dx.doi.org/10.14478/ace.2020.1097

Selective Catalytic Reduction (SCR) of NOx with NH3 on Sb-promoted VWTi Catalysts  

Kim, Su Bin (Department of Environmental Energy Engineering, Graduate School of Kyonggi University)
Choi, Gyeong Ryun (Department of Environmental Energy Engineering, Graduate School of Kyonggi University)
Shin, Jung Hun (Department of Environmental Energy Engineering, Graduate School of Kyonggi University)
Hong, Sung Chang (Department of Environmental Energy Engineering, Kyonggi University)
Publication Information
Applied Chemistry for Engineering / v.32, no.1, 2021 , pp. 35-41 More about this Journal
Abstract
VWTi, which is used as a commercial catalyst in NH3-SCR, exhibits excellent denitrification performance at 300 to 400 ℃, but there is a problem that efficiency decreases at low temperatures below 300 ℃. Research on catalysts containing promoter to increase low-temperature denitrification efficiency is steadily progressing. However, research on the cause of the improvement in low-temperature denitrification efficiency of the catalyst and the catalyst properties is insufficient. In this study, it was confirmed that by adding Sb to VWTi, denitrification performance was improved by more than 10% in NH3-SCR reaction below 300 ℃. At this time, the space velocity and the size of the catalyst particles were controlled to exclude the influence of external/internal diffusion. In addition, the catalytic properties according to the presence or absence of Sb were investigated by performing BET, TEM/EDS, O2-TPD, H2-TPR and DRIFTs analysis. It was judged that the addition of Sb increased the adsorbed oxygen species on the surface of the catalyst, thereby enhancing the redox properties of the catalyst at low temperature and exhibiting excellent denitrification performance.
Keywords
SCR; Catalyst; Antimony; NOx removal; Commercial catalyst;
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