نتایج جستجو برای: coal washing plant

تعداد نتایج: 436500  

Journal: :Environmental science & technology 2007
Joule A Bergerson Lester B Lave

More than 50% of electricity in the U.S. is generated by coal. The U.S. has large coal resources, the cheapest fuel in most areas. Coal fired power plants are likely to continue to provide much of U.S. electricity. However, the type of power plant that should be built is unclear. Technology can reduce pollutant discharges and capture and sequester the CO2 from coal-fired generation. The U.S. En...

Journal: :Ecotoxicology 2010
Scott M Weir Richard S Halbrook Donald W Sparling

There have been contradictory reports of the relative proportion of mercury from coal-fired power plants that deposits locally. Our objective was to determine any local effect of coal-fired power plants on total mercury concentrations in wetland sediment and tadpole samples. Four power plants and 45 wetlands were selected for study. Total mercury concentrations were determined in 75 sediment sa...

2010
Gabriel Chan Laura D. Anadon Melissa Chan Audrey Lee

There is uncertainty about the ex-ante returns to research, development, and demonstration programs in the United States on carbon capture and sequestration (CCS) technology. To quantify this uncertainty, we conducted a written expert elicitation of thirteen experts in fossil power and CCS technologies from the government, academia, and the private sector. We asked experts to provide their reco...

Journal: :journal of sciences, islamic republic of iran 2012
m. yazdi

the alborz coal basin is located in northern part of iran. the coal deposits of shahrood in eastern alborz, zirab in central alborz and abyek in western alborz were studied as typical coalfields of the basin. shemshak formation which is the main coal-bearing sequence was formed during the triassic-jurassic in the basin. it consists of sandstone, siltstone, shale and claystone, which variedly al...

2010
Giorgio Locatelli Mauro Mancini

Nations or regions with limited electrical grid and restricted financial resources are a suitable market for small medium power plants with a size of 300–400 MWe. The literature presents several comparisons about the economics of large power plants (of about 1000 MWe); however there are not probabilistic analysis regarding the economics of small medium power plants. This paper fills this gap co...

2007
Joule Bergerson Lester Lave

Using four times as much coal in 2050 for electricity production need not degrade air quality or increase greenhouse gas emissions. Current SOx and NOx emissions from the power sector could be reduced from 12 to less than 1 and from 5 to 2 million tons annually, respectively, using advanced technology. While direct CO2 emissions from new power plants could be reduced by over 87%, life cycle emi...

2004
DWIGHT H. GREEN M. KOSANKE

An intensive study of fossil microspores, isospores, and prepollens isolated from Illinois coal beds has proved that numerous genera and speiies are present The corFelatinn of coal beds is pussible hecause the geological range of many genera and specin is proved, by this investigation, to Le quite restricted. Preliminnrv exwrimentp with ~ w d c interrexional correlations have dernunstratcd a wi...

A. Joubert, N.J. Wagner, U.A.Q. Ahmed,

Background: Radionuclides occur in coal combustion residues, such as fly ash and bottom ash, which are by-products of coal combustion. They pose potential radiological risks to people present in the surrounding areas. Materials and Methods: Gamma spectrometry was performed to determine the radionuclide activity concentrations in a coal-driven power plant located in the Limpopo province, South A...

Journal: :Occupational medicine 1998
D J Kocks C E Smith

Coal combustion is used in many industrial processes in South Africa. The exposure of workers and the absence of international biological monitoring standards for toluene created a problem. A cross-sectional study on 100 workers indicated that the biological threshold for ortho-cresol:creatinine ratio reference value of < 1 mg/g could presently be used as a reference for non-industrial human ex...

Journal: :Environmental science & technology 2015
Allison Weis Jeremy J Michalek Paulina Jaramillo Roger Lueken

We develop a unit commitment and economic dispatch model to estimate the operation costs and the air emissions externality costs attributable to new electric vehicle electricity demand under controlled vs uncontrolled charging schemes. We focus our analysis on the PJM Interconnection and use scenarios that characterize (1) the most recent power plant fleet for which sufficient data are availabl...

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