FUEL 139 |
| Measurements of the mercury species distribution at the outlet of a square cell monolithic SCR catalyst showed the following trends. In the absence of NH3, a steep rise in the fraction of oxidized mercury with increasing HCl volume fraction was observed in the range from 1 to 2 ppmv HCl, followed by a slow increase in the fraction oxidized toward 100%, with further increase in HCl to 100 ppmv. The addition of NH3, in the presence of 1 ppmv HCl, resulted, at low NH3/NO ratio, in a gradual decrease in mercury oxidation, followed by a steeper decline in oxidation over the range of NH3/NO from 0.95 to 1.15, consistent with the predictions of Niksa and Fujiwara (2005) and Senior (2006). Little change in SO2 oxidation to SO3 was observed with increasing HCl volume fraction over the range from 1 to 100 ppmv HCl, in the absence of NH3. |
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Mercury and Trace Metal Transformations: Modeling
8:25 AM-11:35 AM, Tuesday, August 21, 2007 Boston Park Plaza -- Chartes River Room, Oral
Sci-Mix
Division of Fuel Chemistry |