Iron oxide-based catalysts for low-temperature selective catalytic reduction of NOxwith NH3
| Autor: | Aamir Mehmood, Enlu Wang, Deli Li, Muhammad Tuoqeer Anwar, Naveed Husnain, M. Gul, Mao Jinda, Kai Li |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Reaction mechanism
General Chemical Engineering Iron oxide Industrial chemistry Selective catalytic reduction 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Catalysis chemistry.chemical_compound chemistry Chemical engineering 0210 nano-technology NOx |
| Zdroj: | Reviews in Chemical Engineering. 35:239-264 |
| ISSN: | 2191-0235 0167-8299 |
| Popis: | Selective catalytic reduction (SCR) is now an established NOxremoval technology for industrial flue gas as well as for diesel engine exhaust gas. However, it is still a big challenge to develop a novel low-temperature catalyst for NH3-SCR of NOx, especially at a temperature below 200°C. In the past few years, many studies have demonstrated the potential of iron (Fe)-based catalysts as low-temperature catalysts for NH3-SCR of NOx. Herein, we summarize the recent progress and performance of Fe-based catalysts for low-temperature NH3-SCR of NOx. Catalysts are divided into three categories: single FexOy, Fe-based multimetal oxide, and Fe-based multimetal oxide with support catalysts. The catalytic activity and selectivity of Fe-based catalysts are systematically analyzed and summarized in light of some key factors such as activation energy, specific surface area, morphology, crystallinity, preparation method and precursor, acid sites, calcination temperature, other metal dopant/substitute, and redox property of catalysts. In addition, H2O/SO2tolerance and the NH3-SCR reaction mechanism over Fe-based catalysts, including Eley-Rideal and Langmuir-Hinshelwood mechanism, are emphasized. Lastly, the perspectives and future research directions of low-temperature NH3-SCR of NOxare also proposed. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|