Essay Mercury Emissions

Essay Mercury Emissions

Length: 870 words (2.5 double-spaced pages)

Rating: Better Essays

Open Document

Essay Preview

Even with the current advancements in the development of mercury control technologies, there is no single best way of controlling mercury emissions that can be applied across all electric utility plants in the US. Based on the available mercury control technologies, the cost of removal of mercury is estimated to range as high as $11,000 to $150,000 per kg ($5000 to $70,000 per pound)[17] and adding up to $0.005 per kW-h to power cost.
Control of mercury emissions from coal-fired boiler flue gas is much more challenging problem due the low Mercury concentrations in utility boiler flue gas (typically 0.01 vs. 100+ ppm) and the chemical speciation of mercury in to different physical forms. An understanding of the physical and chemical apportionment of mercury in the system is essential in development and deployment of control systems. There are a number of currently available control technologies that coal-fired power plants use to reduce their emissions of mercury to the atmosphere. The effectiveness of these technologies for mercury removal varies, depending on characteristics of the coal and the configuration of the power plant.
In general, two approaches can be adapted to reducing mercury emissions from coal-fired utility boilers: pollution prevention and post combustion pollution control. Pollution prevention, in some cases, involves commercially available technologies, which do not require capital investment. Many of the conventional post combustion control technologies used on coal-fired power plants to control SO2, and PM have the co-benefit of reducing Hg emissions. A combination of some of these control devices can achieve high (above 95%) mercury control. Coal cleaning can reduce the Hg content of the coal fired...

... middle of paper ...

...candidate that has been shown to oxidize >95 percent of elemental mercury in pilot-scale testing.[21] Iron oxides, Fe2O3 and Fe3O4 in fly ash, have been shown to promote mercury oxidation.[23, 24] While fly ash seems to promote mercury oxidation, studies have shown that only a small amount of the active surface area (1 to 3 percent) plays a role in the process.[25, 26] Fe2O3 has also been used as an effective catalyst in small-scale systems.[27, 28] Two components of refractory, Al2O3 and TiO2, have been shown to oxidize a portion of elemental mercury.[29, 30] Other metal catalysts shown to promote mercury oxidation include iridium[31], MnO2 [28], and CuO.[28] Photochemical oxidation of mercury using ultraviolet irradiation, with particular promise in the presence of TiO2, is another emerging technology being investigated for use in coal-fired power plants.[32-35]

Need Writing Help?

Get feedback on grammar, clarity, concision and logic instantly.

Check your paper »

Mercury Import Ban Act Of Mercury Essay

- At the forefront of worldwide awareness of the hazards of mercury exposure, is the United States. The United States was previously the top exporter of mercury in the world, therefore, the laws and standards implemented have had global ramifications. These laws set the precedence of the handling and disposal of mercury containing materials, as well as, ensuring that incidents like the Minamata tragedy never happen again. Mercury Export Ban. One of the most important laws passed by the United States, in relation to mercury, was the Mercury Export Ban Act that was signed into law on October 14, 2008 (Civic Impulse)....   [tags: United States Environmental Protection Agency]

Better Essays
1165 words (3.3 pages)

Mercury Pollution and Its Effects on the Ecological Environment Essay

- Mercury Pollution Imagine that every fish you have been eating and every fish on the market is contaminated with mercury; would you want to take action to improve this situation in order for yourself and everyone else to have healthy fish to eat. Most of the fish today are exposed to mercury, and mercury toxicity threatens the health of everyone who eats fish. Mercury pollution has been a well known ocean pollution for many years, and United States remain to be one of the top nations with the most severe mercury contamination....   [tags: oceans, contamination, regulations]

Better Essays
1057 words (3 pages)

Essay on Environment: Emissions Reduction

- Recommendations for Process Optimization Emissions Reduction Air pollution control has become a requirement set forth by the Environmental Protection Agency for every incineration facility. All pollution control equipment must be able to operate in such manner that it control and limit emissions and particulates {nitrogen oxides (NOx), sulfur oxides (SOx) and carbon monoxide (CO)} (“Biosolids Technology Fact Sheet”, 2003). The EPA expects that air pollution control devices will reduce nationwide emissions from sewage sludge incinerators by four pounds per year of mercury, 450 tons per year of acid gases, 58 tons per year of particulate matter, and 1.7 tons per year of cadmium and lead (USEPA...   [tags: air pollution, reducing solids, landfill]

Better Essays
1753 words (5 pages)

The Element Mercury Essay

- ... Fires can either be natural or anthropogenic, which can depend on any situation. A study conducted in 2004 on a wild fire at Voyageurs National Park in Minnesota, suggests that the fire can severely reduced the amount mercury in all forms in the area. Another experiment of a prescribe fire in Florida at the Longleaf Pine Forest concluded that 0.171 grams per hectare of mercury was reduced from 0.180 before the fire. On the other hand it also concluded that 1% of mercury re-emitted into the earth atmosphere during this fire, but it does depend on how much mercury deposits are in the soil at the time of the burn or fire (3)....   [tags: man mande, natural element, earth surface]

Better Essays
1308 words (3.7 pages)

Essay on Watershed on the Pensacola Bay

- Watershed on the Pensacola Bay Statement of the Problem A variety of river streams, bay areas, and lakes that are carrying heavy amounts of different kinds of sediments are effecting and endangering animals and human health due mostly to human behavior. Rivers, lakes and bays are undergoing sedimentation because of land clearing associated with agriculture, silviculture, and recreation, as well as dirt toad erosion. “According to the Florida Department of Environmental Protection, the areas that include the greatest concern for sediments are Bayou Chico, lower Bayou Grande, upper Bayou Texar mid- and upper Escambia Bay, and Pensacola Bay, neat the downtown Pensacola waterfront” (Florida D...   [tags: sedimentation, polluted areas, mercury]

Better Essays
1147 words (3.3 pages)

Essay about Methods Used To Reduce Emissions: Coal Gasification

- Coal Gasification Introduction As growing concerns are becoming more and more everyday about the condition of our environment many people and scientists are looking for ways to reduce the climate change that is occurring. Different methods are becoming more and more available to help reduce emissions caused by humans. Also there are many ways that are being discovered that are helping to improve the amount of resources that are available at lowering the cost and producing a cleaner environment....   [tags: environment, climate change]

Better Essays
928 words (2.7 pages)

Zero Emissions Technology Essay

- Zero Emissions Technology Zero Emissions Technology: Current Technologies and Future Developments in Electrostatic Precipitators Abstract Zero Emissions Technology is a company located in New Durham, NH. They develop new technologies targeted at coal fired power plants. They have recently developed a new air emissions technology that will meet current and pending air pollution regulations. Their product, Electro-Catalytic Oxidation Technology, allow the combined removal of particulates in the air waste stream....   [tags: essays papers]

Free Essays
908 words (2.6 pages)

Waste Incineration Issues (the toxic emission, ashes and health problems)

- Bottom ash (clinker) is produced from the furnace and is 90% of total ash produced by incinerators. Bottom ash contains significant concentrations of heavy metals, organic-halogens and other chemo-pollutants. Fly ash is the tiny particles which are trapped by controlling equipment. Fly ash is produced less than the bottom ash. It is correct that “the cleaner the air emissions, the more hazardous ash production”. Temporary storages of these ashes usually are open pits or gears without any protection against wind and rain which cause serious health risks for those who work and live near the incinerator’s storage facilities....   [tags: toxic emissions, ashes, health problems]

Better Essays
1720 words (4.9 pages)

The Mercury Cougar Essay

- Cars are fantastic machines that have truly revolutionized the world ten times over. It has made certain jobs easier and has even made some jobs possible that were not even remotely feasible such as delivery services. Cars have always been in the heart of the American people, especially in the age of muscle cars. Even though there were many similar cars built, the Mercury Cougar was a top of the line car. The Mercury Cougar was designed with luxury and in some ways, is better than its competitors and its present predecessors....   [tags: cars, mercury]

Better Essays
1422 words (4.1 pages)

Essay about Mercury Poisoning

- Mercury Poisoning The article “Our Preferred Poison” in the March 2005 issue of Discover magazine brings up the issue dealing with mercury poisoning. The author, Karen Wright, writes, “Mercury is unimaginably toxic and dangerous. A single drop on a human hand can be irreversibly fatal. A single drop in a large lake can make all the fish in it unsafe to eat.” This was the opening statement in the article which first grabbed my attention, because I had not thought mercury to be such a deadly substance....   [tags: Mercury Poisoning Poison Essays]

Better Essays
571 words (1.6 pages)