Effect of Manganese Ions on the Structure of Ca(OH)2 and Mercury Adsorption Performance of Mnx+/Ca(OH)2 Composites
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- 作者：Yunjun Wang ; Yufeng Duan
- 刊名：Energy & Fuels
- 出版年：2011
- 出版时间：April 21, 2011
- 年：2011
- 卷：25
- 期：4
- 页码：1553-1558
- 全文大小：941K
- 年卷期：v.25,no.4(April 21, 2011)
- ISSN：1520-5029
文摘
The adsorption abilities for vapor-phase Hg0 by a Ca-based sorbent were investigated in an attempt to produce more effective sorbents for the control of elemental mercury emission. Ca(OH)2 and Mnx+ doped in Ca(OH)2 have been characterized by surface analytical methods, such as Brunauer鈭扙mmett鈭扵eller (BET) surface area, scanning electron micrographs (SEMs), energy-dispersive X-ray (EDX) microanalysis, X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). The mercury adsorption characteristic was also revealed by XPS. The results showed that mercury removal by Mnx+/Ca(OH)2 was a bit higher than that by Ca(OH)2. From mercury speciation measurement, Hg0 could be oxidized by MnO2 effectively. From XPS analysis, there was a peak corresponding to the divalent mercury. Thus, there was oxidized mercury on the surface of Mnx+/Ca(OH)2. The presence of MnO2 affected mercury speciation.