A Kinetic Approach to the Catalytic Oxidation of Mercury in Flue Gas

详细信息    查看全文

• 作者：Albert A. Presto ; Evan J. Granite ; Andrew Karash ; Richard A. Hargis ; William J. O'Dowd ; Henry W. Pennline
• 刊名：Energy & Fuels
• 出版年：2006
• 出版时间：September 2006
• 年：2006
• 卷：20
• 期：5
• 页码：1941 - 1945
• 全文大小：56K
• 年卷期：v.20,no.5(September 2006)
• ISSN：1520-5029

文摘

Four mercury oxidation catalysts were tested in a packed bed reactor in the presence of flue gas generatedby the NETL 500 lb/h coal combustor. The four catalysts tested were Ir, Ir/HCl, Darco FGD activated carbon,and Thief/HCl. The Thief/HCl and Darco converted the highest percentage of the inlet mercury; however, thehigh conversion in these experiments was aided by larger catalyst loadings than in the Ir and Ir/HCl experiments.We propose a method for analyzing mercury oxidation catalyst results in a kinetic framework using the bulkreaction rate for oxidized mercury formation normalized by either the catalyst mass or surface area. Resultsreported for fractional mercury oxidation are strongly influenced by the specific experimental conditions andare therefore difficult to translate from experiment to experiment. The catalyst-normalized results allow formore quantitative analysis of mercury oxidation catalyst data and are the first step in creating a predictivemodel that will allow for efficient scaling up from laboratory-scale to larger-scale studies.