Particle and Aerosol Research Vol. 8, No. 4, December 2012 |
ISSN : 1738-8716 (Print) ISSN : 2287-8130 (Online) |
Characteristics of Mercury Oxidation by an SCR Catalyst with Gas Composition
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Abstracts
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.
Keywords£ºSCR catalyst, Mercury, Oxidation, Gas composition
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