Removal of vapor-phase elemental mercury by N-doped CuCoO4 loaded on activated carbon
Removal of vapor-phase elemental mercury by N-doped CuCoO4 loaded on activated carbon
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DOI：
10.1016/j.fuproc.2007.02.002
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发表时间：
2007-06
影响因子：
7.5
通讯作者：
Zhijian Mei;Zhemin Shen;Tao Yuan;Wen-hua Wang;Haibo Han
中科院分区：
文献类型：
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作者：
Zhijian Mei;Zhemin Shen;Tao Yuan;Wen-hua Wang;Haibo Han
The adsorption ability for vapor-phase Hg° on commercially available granular activated carbon (AC) loaded with CuCoO4(AC–C), CuCoO4+NH4Cl (AC–Cl), and CuCoO4+NH4Br (AC–Br) were investigated in an attempt to produce more economic and effective sorbents for the control of Hgoemission from combustion processes. According to the X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Brunauer–Emmett–Teller (BET) and mass balance analysis on mercury, we found that N-doped AC–C had bigger SBETand the nitrogen doping greatly improved CuCoO4Hgooxidation ability. It was considered that nitrogen atoms in doped CuCoO4polycrystalline and anion Cl−/Br-activated by AC and N-doped CuCoO4were responsible for the significant enhancement in Hgooxidation ability of AC–Cl and AC–Br. We explored the Hgooxidation ability of the three kinds of materials under various loading values and adsorption temperatures. We found that AC–Cl and AC–Br were more sensitive to loading value and had much higher Hgooxidation ability than AC–C over a wide range temperature. The longevities of AC–C, AC–Cl and AC–Br were all less than the corresponding Al2O3carrier material due to CuCoO4decomposition effect on AC, which destroyed the porous structure of AC. The effect of 0.31 vol.% SO2on the Hgooxidation ability of AC–C, AC–Cl and AC–Br was insignificant which indicated that N-doping did not adversely affect Co3+and Cu2+-octahedral structure.
