Effect of vanadium surface density and structure in VOx/TiO2 on selective catalytic reduction by NH3
| Autor: | Sung Chang Hong, Jong Min Won, Min Su Kim |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
General Chemical Engineering Vanadium chemistry.chemical_element Selective catalytic reduction 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences law.invention Catalysis symbols.namesake Chemical engineering chemistry law Specific surface area symbols Calcination 0210 nano-technology Raman spectroscopy NOx |
| Zdroj: | Korean Journal of Chemical Engineering. 35:2365-2378 |
| ISSN: | 1975-7220 0256-1115 |
| Popis: | We investigated the correlation between vanadium surface density and VOx structure species in the selective catalytic reduction of NOx by NH3. The properties of the VOx/TiO2 catalysts were investigated using physicochemical measurements, including BET, XRD, Raman spectroscopy, FE-TEM, UV-visible DRS, NH3-TPD, H2-TPR, O2-On/Off. Catalysts were prepared using the wet impregnation method by supporting 1.0-3.0 wt% vanadium on TiO2 thermally treated at various calcination temperatures. Through the above analysis, we found that VOx surface density was 3.4 VOx/nm2, and the optimal V loading amounts were 2.0-2.5 wt% and the specific surface area was 65-80m2/g. In addition, it was confirmed that the optimal VOx surface density and formation of vanadium structure species correlated with the reaction activity depending on the V loading amounts and the specific surface area size. |
| Databáze: | OpenAIRE |
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