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Using Wet-FGD systems for mercury removal.
Mercedes Díaz-Somoano1, Sven Unterberger, Klaus R G Hein
1Institute of Process Engineering and Power Plant Technology, University of Stuttgart, Pfaffenwaldring 23, D-70569, Stuttgart, Germany. diaz@ivd.uni-stuttgart.de
Journal of Environmental Monitoring : JEM
|August 27, 2005
Summary
European regulations necessitate efficient mercury removal technology. This study evaluates wet flue gas desulfurization (WFGD) scrubbers, finding pH, SO2 concentration, and solid oxide additives significantly enhance mercury capture.
Area of Science:
- Environmental Engineering
- Chemical Engineering
- Atmospheric Chemistry
Background:
- European Commission regulations mandate mercury emission controls.
- Wet flue gas desulfurization (WFGD) is a promising multi-pollutant control technology.
- Enhanced mercury removal efficiency in WFGD systems requires further investigation.
Purpose of the Study:
- To evaluate scrubber chemistry for mercury removal.
- To assess the impact of solid additives on mercury capture in WFGD units.
- To identify key operational parameters influencing mercury removal efficiency.
Main Methods:
- Experimental evaluation of scrubber chemistry.
- Testing various solid additives for mercury capture enhancement.
- Analysis of correlations between mercury removal efficiency and parameters like pH, SO2, oxygen, and slurry concentration.
Main Results:
- Significant positive correlation found between mercury removal efficiency and scrubber slurry pH.
- Significant positive correlation observed between mercury removal efficiency and SO2 concentration.
- Several solid oxides demonstrated effectiveness as additives for enhancing mercury capture.
Conclusions:
- WFGD technology offers a viable route for mercury emission control.
- Optimizing scrubber pH and SO2 concentration is crucial for maximizing mercury removal.
- Solid oxide additives represent a promising strategy to further improve mercury capture in WFGD systems.