Mercury Oxidation in Flue Gas Using Gold and Palladium Catalysts on Fabric Filters

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• 作者：Jason A. Hrdlicka ; Wayne S. Seames ; Michael D. Mann ; Darrin S. Muggli ; Carol A. Horabik
• 刊名：Environmental Science & Technology
• 出版年：2008
• 出版时间：September 1, 2008
• 年：2008
• 卷：42
• 期：17
• 页码：6677-6682
• 全文大小：186K
• 年卷期：v.42,no.17(September 1, 2008)
• ISSN：1520-5851

文摘

The feasibility of oxidizing elemental mercury in coal combustion flue gas using catalytic material impregnated onto fabric filters was explored. TiO₂, Au/TiO₂, and Pd/Al₂O₃ were studied based on promising results in previous research. Several fabric coating methods were investigated to determine the best way to load a filter. A spray coat method was found to have the highest initial loading and had the lowest losses after simulated pulse-jet cleaning. The oxidation performance of the catalyst-coated filters was tested using a simulated flue gas in a bench-scale reactor under conditions similar to those found in a baghouse. Au/TiO₂ and Pd/Al₂O₃ were effective, yielding mercury oxidation ranges of 40−60% and 50−80%, respectively. A 19 kW research combustor equipped with a baghouse was used to fire a range of coals and further test the performance of Pd/Al₂O₃. Results obtained warrant further development of this technique as a means of mercury pollution control.