دورية
The nature of synergy effects between VOxand TiO2in low temperature NH3-SCR reaction
| العنوان: | The nature of synergy effects between VOxand TiO2in low temperature NH3-SCR reaction |
|---|---|
| المؤلفون: | Jin, Yingying, Li, Jiaying, Fan, Kaihao, Chen, Yong, Yang, Yaping, Liu, Xuesong |
| المصدر: | Journal of Environmental Chemical Engineering; October 2024, Vol. 12 Issue: 5 |
| مستخلص: | In this study, we investigated the low-temperature activity of selective catalytic reduction of NO by NH3(NH3-SCR) with the effect of different vanadium oxide (VOx) loading in the VOx/TiO2catalyst. By calculating the specific rate of activity, it was found that the fastest specific rate of activity was achieved when the loading of V2O5reached 10 wt%, and the nitrogen oxides (NOx) conversion of the above optimal catalyst reached over 80 % in the temperature range of 180–465 °C. The effects of preparation method, calcination temperature, and support on the aggregation state of the vanadium species and the SCR activity of the catalyst were also investigated on the basis of the ideal ratio. Combining the activity and characterization results, it is found that the impregnation method and calcination at 410 °C are more favorable for the moderate dispersion of the vanadium species on the TiO2surface, producing more highly reactive polymorphic VOx, which is more readily dispersed on the surface of the TiO2support and interacts more strongly with the TiO2. The interaction between the two can promote the transfer of electrons, resulting in the production of more active O species and low-valent vanadium. The aforementioned species can enhance the catalyst's low- temperature denitrification activity. |
| قاعدة البيانات: | Supplemental Index |
Full Text Finder | تدمد: | 22132929 22133437 |
|---|---|
| DOI: | 10.1016/j.jece.2024.113689 |