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| Experimental research of removing elemental mercury from simulated flue gas by CeCl3-loaded activated carbon fiber |
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Abstract ACF impregnated with CeCl3 was developed and some related experiments including reaction temperature, CeCl3 loading value and flue gas component on Hg0 removal efficiencies were conducted. In addition, Brunauer-Emmett-Teller (BET) and X-ray diffractometer (XRD) analyses were used to characterize the samples. The results showed that CeCl3 significantly improved the mercury removal capacity of activated carbon fiber in the simulated flue gas. In this experimental condition, the optimal loading value of CeCl3 was 5% (mass fraction); when the temperature was below 140°C, the removal efficiency of CeCl3/ACF for Hg0 was enhanced with the increase of the temperature and then decreased above 140°C; moreover, the effect of NO, SO2 and water vapor on the removal of mercury were studied. It has been found that NO had a certain facilitating role on removal of elemental mercury, and there was a positive relationship between the concentrations of NO and the removal efficiency of Hg0; SO2 inhibited the removal of Hg0, and the removal efficiency decreased with the increase of SO2 concentrations; the Hg0 removal efficiency of CeCl3/ACF was hindered by the water vapor.
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Received: 29 August 2011
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