Catalytic reduction of NO by CO with Cu-based and Mn-based catalysts
| Autor: | Moo Been Chang, Kuan Lun Pan, Guan-Ting Pan, Chyi Woei Young |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Inorganic chemistry No conversion chemistry.chemical_element Selective catalytic reduction 02 engineering and technology General Chemistry Activation energy 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Oxygen Catalysis 0104 chemical sciences chemistry Active component medicine 0210 nano-technology Activated carbon medicine.drug |
| Zdroj: | Catalysis Today. 348:15-25 |
| ISSN: | 0920-5861 |
| DOI: | 10.1016/j.cattod.2019.08.038 |
| Popis: | Various Cu-based and Mn-based catalysts are prepared and evaluated for the reduction of NO with CO process. Cu-Ce-Fe-Co/TiO2 and Mn-Ce-Fe-Co/TiO2 show the best catalytic performance for the reduction of NO with CO process among Cu-based and Mn-based catalysts, respectively. The highest conversions of NO and CO achieved with Cu-Ce-Fe-Co/TiO2 reach 100% and 79%, respectively, with the operating temperature of 250 ℃, while 100% and 70% are achieved with Mn-Ce-Fe-Co/TiO2 for the gas streams containing 200 ppm NO and 200 ppm CO. The results reveal that both modified catalysts (e.g., Cu-Ce-Fe-Co/TiO2 and Mn-Ce-Fe-Co/TiO2) have good activities for CO + NO reaction. Overall, Cu-Ce-Fe-Co/TiO2 has better tolerance for O2, SO2 and H2O(g) than Mn-Ce-Fe-Co/TiO2. Good catalytic performance of Cu-Ce-Fe-Co/TiO2 toward NO reduction is attributed to its good surface properties, i.e., reducibility, oxygen mobility and more oxygen vacancies. Additionally, the apparent activation energy is calculated as 54.2 kJ/mol is calculated using Mars-Van Krevelen model for reduction of NO with CO process with Cu-Ce-Fe-Co/TiO2 as catalyst. Further, active component Cu-Ce-Fe-Co is loaded on activated carbon (AC) to form Cu-Ce-Fe-Co/AC, which is applied as catalyst for durability test. The results indicate that NO conversion achieved with Cu-Ce-Fe-Co/AC maintains at 100% during 240 min operation period, even in the simultaneous presence of O2, H2O(g) and SO2. Overall, this study demonstrates that Cu-based catalyst is promising for the reduction of NO with CO process. |
| Databáze: | OpenAIRE |
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