Oxidation Catalysts for Elemental Mercury in Flue Gases-A Review

被引:92
作者
Dranga, Beatrice-Andreea [1 ,2 ]
Lazar, Liliana [1 ]
Koeser, Heinz [2 ]
机构
[1] Gheorghe Asachi Tech Univ Iasi, Fac Chem Engn & Environm Protect, Dept Chem Engn, Iasi 700050, Romania
[2] Univ Halle Wittenberg, Engn Sci Ctr, Univ Magdeburg, D-06099 Halle, Saale, Germany
关键词
mercury oxidation; catalysts; Hgel oxidation mechanisms; SCR; noble metal; transition metal oxide; REDUCTION SCR; REMOVAL; MECHANISM; ADSORPTION; SPECIATION; EMISSIONS; CAPTURE; GOLD; CONVERSION; PALLADIUM;
D O I
10.3390/catal2010139
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070305 [高分子化学与物理];
摘要
The removal of mercury from flue gases in scrubbers is greatly facilitated if the mercury is present as water-soluble oxidized species. Therefore, increased mercury oxidation upstream of scrubber devices will improve overall mercury removal. For this purpose heterogeneous catalysts have recently attracted a great deal of interest. Selective catalytic reduction (SCR), noble metal and transition metal oxide based catalysts have been investigated at both the laboratory and plant scale with this objective. A review article published in 2006 covers the progress in the elemental mercury (Hg-el) catalytic oxidation area. This paper brings the review in this area up to date. To this end, 110 papers including several reports and patents are reviewed. For each type of catalyst the possible mechanisms as well as the effect of flue gas components on activity and stability are examined. Advantages and main problems are analyzed. The possible future directions of catalyst development in this environmental research area are outlined.
引用
收藏
页码:139 / 170
页数:32
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