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NOVEL OXIDANT FOR ELEMENTAL MERCURY CONTROL FROM FLUE GAS
Citation:
LEE, J., S. LEE, T. C. KEENER, Y. JU, R. S. VARMA, AND S. K. SIKDAR. NOVEL OXIDANT FOR ELEMENTAL MERCURY CONTROL FROM FLUE GAS. Presented at American Chemical Society National Meeting, San Francisco, CA, September 10 - 14, 2006.
Impact/Purpose:
To inform the public
Description:
A novel economical oxidant has been developed for elemental mercury (Hg(0)) removal from coal-fired boilers. The oxidant was rigorously tested in a lab-scale fixed-bed system with the Norit America's FGD activated carbon (DOE's benchmark sorbent) in a typical PRB subbituminous/lignite simulated flue gas at 140 C. The test results showed excellent performance on Hg(0) removal by the mixture of the novel oxidant and the activated carbon. The results also showed that a very small amount (~10%) of activated carbon injection could eliminate almost all of the mercury generated by reaction(s) of Hg(0) with the novel oxidant, indicating promising use in subbituminous/lignite flue gases with relatively high Hg(0) content. In addition, a preliminary cost estimate for sorbent injection was almost 70~80% less than that of raw FGD activated carbon at subbituminous and lignite-firing sites.