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This work reports the chemical speciation and leaching characteristics of seven hazardous trace elements (HTEs, including Hg, As, Cr, Cd, Ba, Mn, and Pb) in the coal and fly ash samples collected from four coal-fired power plants in China. The physical structure and chemical composition of the fly ash were characterized by the scanning electron microscope (SEM) and the energy dispersive X-ray spectrometer...
Coal-fired power plant is considered to be main anthropogenic emitter for emission of hazardous trace elements (HTEs), which can cause great damage on environment and human health. Emission characteristic of nine HTEs, namely Hg, Zn, Sb, Pb, Cd, As, Cr, Mn and Ba was carried out on a 320MW coal-fired power plant equipped with SCR, ESP and WFGD. US EPA method 29 was used for flue gas HTEs sampling...
Migration and emission characteristics of mercury in coal-fired power plant with an ammonia-based wet flue gas desulfurization (Am-based WFGD) process were studied based on the Ontario Hydro Method (OHM). The temperature-programmed desorption (TPD) method was used to identify the mercury species enrichment mechanisms in fly ash and the by-products of desulfurization. The SCR has a 95.41% mercury oxidation...
Effects of temperature and the amount of sludge on the physicochemical properties of the waste liquid products produced from the hydrothermal treatment (HT) of both low-rank coal and sludge were investigated. The slurryability of coal sludge slurry (CSS) prepared with HT solid and waste liquid product was also analyzed. An increase in the amount of sludge led to a decrease in the solid yield, calorificvalue...
Mercury emissions from a Chinese ultra-low emission (ULE) coal-fired power plant burning a low chlorine and sulfur bituminous coal was investigated by using the Ontario Hydro method (OHM). A temperature-programmed decomposition desorption (TPDD) instrument, scanning electron microscope (SEM), and X-ray power diffraction spectrometry (XRD) were used to identify the mercury species, apparent morphology,...
Experiments were carried out on a pilot scale slurry transport apparatus to investigate slip flow behavior of coal water slurries (CWSs) in pipes with various diameters (25, 32, 40 and 50mm). The effects of volume concentration, particle size and slurry temperature on wall slip behavior (wall slip velocity, critical wall shear stress and slippage contribution) were investigated. A numerical technique...
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