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Waste Management & Research
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Mercury Behaviour in Flue Gases

Jan G. T. Bergström

Environmental Consultants at Studsvik AB, S-611 82, Nykoping, Sweden

Mercury in the flue gas from waste incineration is predominantly in the vapour phase at temperatures down to 140 °C. Only a small portion of the mercury is metallic Hg°, most of it is oxidized, which has a high vapour pressure at these gas temperatures. Oxidized mercury is absorbed by fly ash and will be captured on fabric filters. By injecting fly ash and lime before a fabric filter a high degree of collection can be achieved, both for hydrochloric acid and for mercury.

Up to 90% of the mercury can become attached to the dust. By optimizing the operation and with efficient dust removal it is therefore possible to limit mercury emissions to less than 0.3 g ton-1 of incinerated waste.

Key Words: Waste incineration • mercury emissions • flue gases.

Waste Management & Research, Vol. 4, No. 1, 57-64 (1986)
DOI: 10.1177/0734242X8600400108
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