Effect of gas composition on the selective reduction of NOx with ammonia over Vanadia based catalysts
Effect of gas composition on the selective reduction of NOx with ammonia over Vanadia based catalysts
The catalytic reduction of NOx under different oxygen concentrations leading to different NO/NO2 compositions has been studied in the presence of V3W9Ti and V8W9Ti catalysts in a tubular flow reactor. The results have shown that increasing O2 concentration leads to increase the NOx reduction in low temperature range [150-275 °C]. Slight effect of O2 concentration on NOx conversion was observed at higher temperatures. SCR reaction also occurred in the absence of gaseous oxygen but with low NO conversion indicating the strong redox properties of both catalysts. Aged catalysts exhibited relative good activities in NOx reduction. This is probably due to the sol gel method used for the preparation of the catalysts known to improve the catalysts properties.
___
- J. Jiang, D. Li, Theoretical analysis and experimental confirmation of exhaust temperature control for diesel vehicle NOx emissions reduction, Applied Energy 174, 232-244, 2016.
- S. Djerad, M. Crocoll, S. Kureti, L. Tifouti, W. Weisweiler, Effect of oxygen concentration on the NOx reduction with ammonia over V2O5–WO3/TiO2 catalyst, Catalysis Today 113, 208, 2006.
- A. Marberger, D. Ferri, M. Elsener, A. Sagar, C. Artner, K. Schermanz, O. Kröcher, Relationship between structures and activities of supported metal vanadates for the selective catalytic reduction of NO by NH3, Applied Catalysis B: Environmental 218, 731-742, 2017.
- Yayın Aralığı: Yılda 4 Sayı
- Başlangıç: 2018
- Yayıncı: Yıldız Teknik Üniversitesi