Low-Temperature Selective Catalytic Reduction of NO with NH3 over Fe-C e-O x Catalysts

• Published in: 天津大学学报：英文版 Vol. 23; no. 1; pp. 35 - 42
• Main Author: Yan Sun;Ying Guo;Wei Su;Yajuan Wei
• Format: Journal Article
• Language: English
• Published: 2017
• Subjects: catalytic; Fe-Ce-Ox;Low-temperature; hourly; molar; ratio;Gas; reduction;Fe/Ce; resistance; selective; space; velocity;Stability;SO2/H2O
• ISSN: 1006-4982; 1995-8196

In this study, we used a simple impregnation method to prepare Fe-Ce-Ox catalysts and tested them regarding their low-temperature (200-300 °C) selective catalytic reduction (SCR) of NO using NH3. We investigated the effects of Fe/Ce molar ratio, the gas hourly space velocity (GHSV), the stability and SO2/H2O resistance of the catalysts. The results showed that the FeCe(1:6)〇x (Ce/ Fe molar ratio is 1:6) catalyst, which has some ordered parallel channels, exhibited good SCR performance. The FeCe(1:6)Ox catalyst had the highest NO conversion with an activity of 94-99% at temperatures between 200 and 300 °C at a space velocity of 28,800 h-1. The NO conversion for the FeCe(1:6)Ox catalyst also reached 80-98% between 200 and 300 °C at a space velocity of 204,000 h-1. In addition, the FeCe(1:6)Ox catalyst demonstrated good stability in a 10-h SCR reaction at 200-300 °C. Even in the presence of SO2 and H2O, the FeCe(1:6)Ox catalyst exhibited good SCR performance.