6.1.1 - Microwave-based control of an SCR-based flue gas aftertreatment system for biomass combustion
- Event
- EUROSENSORS 2026
2026-09-06 - 2026-09-09
Zurich - Band
- Lectures
- Chapter
- Chemical Sensors
- Author(s)
- B. Streibl, R. Moos, T. Wöhrl, G. Hagen - University of Bayreuth,Bayreuth (Germany), T. Ritter - H+H Engineering & Service GmbH,Sonnefeld (Germany)
- Pages
- 186 - 187
- DOI
- 10.5162/eurosensors2026/6.1.1
- ISBN
- 978-3-910600-12-6
- Price
- free
Abstract
Selective catalytic reduction (SCR) is essential for reducing NOₓ emissions from biomass ‑ fired plants, where fluctuating fuel composition leads to strongly varying raw emissions. Conventional SCR control relies on fixed calibration curves or gas sensors, which can cause inefficiencies and NH 3 slip. This work investigates a radio frequency (RF) ‑ based approach in which the catalyst itself acts as a sensor by monitoring its electromagnetic properties. Experiments show a clear correlation between RF signals and NH 3 storage on commercial vanadia-based catalysts. The results indicate that RF ‑ based control enables more precise and robust SCR operation than conventional gas sensor ‑ based methods.