Optimization of mercury removal performance of coal-fired power plant pollutant control devices based on CFB units
In response to the problem of mercury emissions in the flue gas of coal-fired power plants,a study was conducted to prepare an efficient mercury removal adsorbent by loading CuCl2 onto magnetic palygorskite using impregnation method.At the same time,the mass ratio of CuCl2 to magnetic palygorskite was adjusted,and mercury removal tests were conducted at different temperatures to explore the effect of different loading amounts on the performance of the adsorbent.The results showed that pure FA adsorbent mainly exhibited palygorskite and the characteristic peak of γ-Fe2O3,the peak intensity weakens after CuCl2 loading.Although the addition of CuCl2 did not change the basic structure,as the CuCl2 loading increased,the specific surface area and total pore volume decreased,especially for the 0.05CuFA sample,whose specific surface area exceeded 120 m2/g,which was beneficial for improving the adsorption of gaseous mercury.The magnetic stability of the adsorbent was at 18 emu/g.Both pure FA and 0.05CuFA samples exhibited superparamagnetism without retaining residual magnetism,making it easy to reuse.By optimizing the preparation conditions of the adsorbent,the removal effi-ciency of mercury in the flue gas of coal-fired power plants can be improved.Research on reducing mercury emissions in industrial processes such as coal-fired power plants has significant environmental and technological implications.
CFBcoal-fired power plantpollutant controlmercury removal
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