Experimental Study on Preparation and Operating Conditions over a Promising Monolithic Catalysts for NOx Removal: MnOx/TiO2/Cordierite
| Autor: | Junlin Xie, Kai Qi, Feng He, Feng Xiang Li |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Vanadium chemistry.chemical_element Mineralogy Cordierite 02 engineering and technology engineering.material 010402 general chemistry 01 natural sciences Catalysis Pickling General Materials Science Ceramic NOx Mechanical Engineering Selective catalytic reduction 021001 nanoscience & nanotechnology Condensed Matter Physics 0104 chemical sciences chemistry Chemical engineering Mechanics of Materials visual_art engineering visual_art.visual_art_medium 0210 nano-technology Space velocity |
| Zdroj: | Materials Science Forum. 898:1905-1915 |
| ISSN: | 1662-9752 |
| DOI: | 10.4028/www.scientific.net/msf.898.1905 |
| Popis: | The samples of MnOx/TiO2 catalysts supported on cordierite honeycomb ceramics were prepared by a sol-gel-impregnation method, and evaluated for low-temperature (353-473 K) selective catalytic reduction (SCR) of NOx with NH3. The influences of pretreatment on cordierite and catalyst dosage were investigated at first and optimized as follows: pickling for cordierite honeycomb ceramics with 1 mol/L HNO3 for 3 h prior to loading procedure as well as the catalyst dosage of 3-5 wt.%. The activity results indicated that there was an optimum working condition for MnOx/TiO2/cordierite catalysts: NH3/NO molar ratio=1.1, [O2]=3 vol.%, GHSV=5514 h-1, the highest activity of nearly 100% NO conversion could be obtained. As a comparison, the performances of commercialized vanadium-based honeycomb catalyst were also employed, which revealed the narrower scope of application of GHSV and the higher active temperature window. In conclusion, it turns out that the prepared MnOx/TiO2/cordierite catalysts are more applicable as a low-temperature SCR catalyst for NOx removal in a more complicated application environment. |
| Databáze: | OpenAIRE |
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