(573d) Simultaneous Removal of NOx and Gas-Phase Mercury Using Ceria-Titania Materials

Authors: 
Thiel, S. W., University of Cincinnati
He, J., University of Cincinnati
Smirniotis, P., University of Cincinnati
Pinto, N. G., University of Cincinnati


Mercury capture using metal oxides and selective catalytic reduction (SCR) catalysts has been studied. Titania-supported manganese oxide was previously found to have an elemental mercury uptake of more than 50 mg/g in fixed-bed adsorption tests using a nitrogen environment at 175°C. The current study shows that manganese dioxide supported on ceria-titania can be used for vapor phase elemental mercury capture from nitrogen at 160 to 200°C; mercury capacities ranged from 4 to 54 mg Hg0/g adsorbent depending on the specific gas composition and temperature. It was also found that manganese dioxide supported on ceria-titania showed quantitative NOx reduction using NH3 as reductant at a reaction temperature below 200ºC. Most significantly, it was found that manganese dioxide supported on ceria-titania can remove elemental mercury and NOx simultaneously at 175°C in a fixed-bed system.

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