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Comment PDF Environment, Health, Safety & Security

Chementator: Halogenated activated carbon reduces mercury emissions from a coal-fired plant  

By Gerald Ondrey |

In its first full-scale test on a coal-fired power plant, halogenated activated carbon (AC) made by ADA-ES, Inc. (Littleton, Colo.; edlinks.chemengonline.com/7371-537) has reduced mercury emissions by more than 90%. The significance of the results is that the plant burns western coal, which differs from bituminous coal in that it contains elemental mercury, which is not amenable to absorption. Compared to bituminous coal, western coal contains less chlorine and other oxidants to oxidize the mercury so that it can be readily absorbed. ADA’s process gets around this problem by using halogen-doped AC, notes Jean Bustard, chief operating officer. ADA-ES is one of a number of companies offering mercury-control processes ( CE, January 2007, pp. 26 – 30). Bustard says the company already has more than 25 contracts for mercury-control systems, of which four have started up.   Click here for a full pdf version of the Chementator Section
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