The push is on to find a technology that will reduce mercury emissions 90% by 2015 in the state of Michigan – a regulation more stringent than the national standard, which calls for a 70% reduction. They’re hoping a big part of the solution will be Toxecon, a new sysem designed to keep gaseous mercury from escaping wth the rest of the power plant pollutants. While there are still bugs to be worked out, researchers are optomistic about the technology.
Toxecon injects activated, powdery carbon into the superheated gas from coal incineration. The carbon absorbs the mercury and flows into a newly constructed building called a “bag house,” where it’s trapped inside the network of fabric bags.
As a bonus, designers hope the process also will remove up to 70 percent of the sulfur dioxide and 30 percent of the nitrogen oxide from the gas, along with the 1 percent of fly ash from coal combustion that isn’t captured earlier.
Read More »U.S. power plants to control mercury emissions