Predicting SO3 Levels along Utility Gas Cleaning Systems and Their Impact on Hg Removals by Carbon Sorbents
This paper introduces a combined homogeneous and heterogeneous SO3 production mechanism to quantify the interference of SO3 on the capture of Hg by unburned carbon (UBC) and activated carbon sorbents in flue gas from coal-fired power plants.This mechanism was validated against measurements at different locations along the gas cleaning systems at fourteen power plants representing the entire range of coal-S,furnace stoichiometry,and gas cleaning conditions found in commercial applications.The SO3 production mechanism was then integrated into validated Hg transformation mechanisms to account for inhibition of Hg oxidation and removal due to SO3 condensation on fly ash,UBC and activated carbon.This analysis subsequently interpreted Hg removals for more than two dozen test measurements at Daniel and the Mercury Research Center that represented different coal blends,ACI concentrations,conventional and brominated activated carbons,and SO3 concentrations.The simulations identified the tests affected by SO3 interference and predicted the Hg removal by ACI to within 15 ％ of the test measurements for 22 of the 27 tests at these two sites
SO3:Hg emissions:simulation:ACI:flue gas cleaning
Balaji Krishnakumar Stephen Niksa
Niksa Energy Associates LLC,1745 Terrace Drive,Belmont,CA 94002 USA
国际会议
The 8th International Symposium on Gas Cleaning at High Temperatures(第八届国际高温气体净化技术研讨会 GCHT-8)
太原
英文
37-48
2010-08-23（万方平台首次上网日期，不代表论文的发表时间）