A Initial Analysis and Evaluation of Mercury Content in Raw Coal Samples Used in some Coal-fired Thermal Power Plants in Vietnam
Main Article Content
Abstract
Abstract: The domestic coal used for the current thermal power plants in Vietnam is dust coal 5,6 according to TCVN 8910:2015, the content of low volatile matter, high ash. In addition to the metal, metal oxide components has previously identified concentrations in the coal, the content of mercury was also initially studied. Based on analysis, the content of mercury in raw materials of some Vietnam’s coal-fired thermal power plants is fluctuated in the range of 0.06-0.14ppm, particularly with the sample of 0.82ppm. The value of this content is low compared to similar coal in China and some other countries. With the presence of mercury in the material, according to the principle of material preservation, mercury will appear in the product combustion process, including solid, liquid and gas phase, with different degrees of distribution depending on fire conditions. According to preliminary assessment, the coal resources from Mong Duong, Uong Bi, Vang Danh, Khe Cham, Nam Mau and Cao Son mines have low level of mercury but this level of mercury is still higher compared to the other domestic antracite mines as well as current imported coal.
Keywords: Coal-fired thermal power plant, Mercury, Toxic, Burning process, Control of pollutants.
References
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