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Effect of Ammonium Formate and Mixtures of Urea and Ammonium Formate on Low Temperature Activity of SCR Systems
Technical Paper
2005-01-1856
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The urea based SCR technology will face problems with the high freezing point (-11°C) of the reductant. In many parts of the world temperatures regularly fall much lower than this. With ammonium formate-urea solution the freezing point can be as low as - 30 °C.
The reduction capacity of various ammonium formate solutions and its mixtures with urea were studied. When using ammonium formate and its mixtures as reductant in SCR experiments a significant improvement in the DeNOx activity in the low temperature operation was seen. In general in the engine experiments the ammonium formate-urea mixtures showed a reduction capacity comparable to standard urea.
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Authors
- Anu Solla - VTT Technical Research Centre of Finland
- Mårten Westerholm - VTT Technical Research Centre of Finland
- Christer Söderström - VTT Technical Research Centre of Finland
- Kauko Tormonen - VTT Technical Research Centre of Finland
- Timo Härmä - Kemira Oy, Finland
- Timo Nissinen - Kemira Oy, Finland
- Jari Kukkonen - Kemira Oy, Finland
Citation
Solla, A., Westerholm, M., Söderström, C., Tormonen, K. et al., "Effect of Ammonium Formate and Mixtures of Urea and Ammonium Formate on Low Temperature Activity of SCR Systems," SAE Technical Paper 2005-01-1856, 2005, https://doi.org/10.4271/2005-01-1856.Also In
Diesel Exhaust Emission Control and Modeling on CD-ROM from the SAE 2005 World Congress
Number: SP-1981CD; Published: 2005-04-11
Number: SP-1981CD; Published: 2005-04-11
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