가스조성에 따른 선택적 환원촉매의 수은 산화 특성
Characteristics of Mercury Oxidation by an SCR Catalyst with Gas Composition
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초록
Mercury oxidation in an SCR(selective catalytic reduction) catalyst was tested in this study with the conditions simulating the SCR system in full-scale coal-fired flue gas. A commercially available SCR catalyst was located in a temperature-controlled reactor system, and simulated gas was injected into the reactor. Mercury oxidation efficiency was determined from the difference between inlet and outlet elemental mercury concentrations. A control experiment was carried out with the gas composition of 12% CO2, 5% H2O, 5% O2, 500 ppm SO2, 400 ppm NO, 400 ppm NH3, 5 ppm HCl, and 20 µg/㎥ Hg. Additional tests were conducted with different gas composition from the control condition to investigate the effect of gas composition on mercury oxidation in the SCR catalyst.
Abstract
Mercury oxidation in an SCR(selective catalytic reduction) catalyst was tested in this study with the conditions simulating the SCR system in full-scale coal-fired flue gas. A commercially available SCR catalyst was located in a temperature-controlled reactor system, and simulated gas was injected into the reactor. Mercury oxidation efficiency was determined from the difference between inlet and outlet elemental mercury concentrations. A control experiment was carried out with the gas composition of 12% CO2, 5% H2O, 5% O2, 500 ppm SO2, 400 ppm NO, 400 ppm NH3, 5 ppm HCl, and 20 µg/㎥ Hg. Additional tests were conducted with different gas composition from the control condition to investigate the effect of gas composition on mercury oxidation in the SCR catalyst.
참고문헌 (10)
- Galbreath, K. C, "Mercury transformations in coal combustion flue gas", Fuel Processing Technol, pp.289~310 (2000)
- Sung-Won Ham, "Characteristics of commercial selective catalytic reduction catalyst for the oxidation of gaseous elemental mercury with respect to reaction conditions", The Korean Journal of Chemical Engineering, 27(4), pp.1117~1122 (2010), 한국화학공학회
- Kilgroe, J. D, "Control of mercury emissions from coal-fired electric utility boilers: interim report, U.S. Environmental Protection Agency, Research Triangle Park" (2001), NC
- 이승민, "상용 SCR 촉매상에서 화력발전소 배기가스 중 원소수은의 산화반응연구", 한국대기환경학회지, 26(3), pp.245~252 (2010), 한국대기환경학회
- Li, H., "Oxidation and capture of elemental mercury over SiO2–.TiO2–.V2O5 catalysts in simulated low-rank coal combustion flue gas", Chemical Engineering Journal, 169, pp.186~193 (2011)
- Li, H., "Superior activity of MnOx-CeO2", TiO2 catalyst for catalytic oxidation of elemental mercury at low flue gas temperatures, 2012, pp.111,112, 381~388
- Pacyna, E. G, "Global anthropogenic mercury emission inventory for 2000", Atmospheric Environment, 40, pp.4048~4063 (2006)
- Rallo, M, "Effect of SCR operation variables on mercury speciation", Chemical Engineering Journal, pp.198~199 (2012)
- Senior, C. L., "Gas-phase transformations of mercury in coal-fired power plants", Fuel Processing Technol, 63, pp.197~213 (2004)
- Zhuang, Y., "Impacts of acid gases on mercury oxidation across SCR catalyst", Fuel Processing Technology, 88, pp.929~934 (2007)