| 活性焦负载MnO2对气态Hg0的吸附脱除研究 |
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| 引用本文： | 王钧伟,刘瑞卿.活性焦负载MnO2对气态Hg0的吸附脱除研究[J].环境科学学报,2012,32(9):2261-2266. |
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| 作者姓名： | 王钧伟 刘瑞卿 |
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| 作者单位： | 1. 安庆师范学院化学化工学院,安庆246011／安庆师范学院光电磁功能配合物和纳米配合物安徽省重点实验室,安庆246011
2. 山西大学环境与资源学院,太原,030006 |
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| 基金项目： | 安徽省高等学校省级自然科学研究项目 (No. kj2012b085);国家自然科学基金项目 (No. 21001007, 21001008) |
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| 摘 要： | 研究了活性焦(AC)及负载MnO2的活性焦(MnO2/AC)对气态Hg0的吸附脱除,发现负载MnO2到AC明显提高了其对Hg0的吸附脱除能力.考察了MnO2负载量、温度、Hg0浓度和烟气成分等对MnO2/AC吸附脱除Hg0的影响.结果表明,MnO2/AC对Hg0的吸附脱除能力随MnO2负载量的增加而增强;在120～200℃的温度范围内,随着温度升高,MnO2/AC对Hg0的吸附脱除能力增强;O2和HCl对MnO2/AC吸附脱除Hg0具有促进作用,而SO2和H2O具有抑制作用.SEM-EDX和逐级化学提取结果证实,MnO2将Hg0催化氧化为HgO并吸附在AC上,这是MnO2/AC具有较高的吸附脱除Hg0能力的原因.
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| 关 键 词： | MnO2/AC Hg0 吸附 氧化 活性焦 |
| 收稿时间： | 2011/11/8 0:00:00 |
| 修稿时间： | 2/1/2012 12:00:00 AM |
Hg0 removal by an activated coke-supported MnO2 catalyst |
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| WANG Junwei and LIU Ruiqing.Hg0 removal by an activated coke-supported MnO2 catalyst[J].Acta Scientiae Circumstantiae,2012,32(9):2261-2266. |
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| Authors: | WANG Junwei and LIU Ruiqing |
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| Institution: | 1. School of Chemistry and Chemical Engineering, Anqing Normal University, Anqing 246011;2. Anhui Provincial Laboratory of Optoelectronic and Magnetism Functional Materials, Anqing Normal University, Anqing 246011;College of Environmental Science and Resources, Shanxi University, Taiyuan 030006 |
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| Abstract: | Gas-phase Hg0 removal by an activated coke(AC) and an activated coke-supported MnO2 catalyst(MnO2/AC) were studied.The influences of MnO2 loading,temperature,inlet Hg0 concentration and flue gas components on Hg0 removal were characterized.It was found that MnO2/AC had a much higher Hg0 removal capability than AC,which can be attributed to the oxidation activity of MnO2.The capability increased with an increase of MnO2 loading in the range of 1%~10%,and it was promoted by O2 and HCl but inhibited by SO2 and H2O.In the stack temperature range(120~200 ℃),MnO2/AC showed high activity for Hg0 removal.Scanning electron microscope-energy dispersive X-ray analysis(SEM-EDX) and sequential chemical extraction experiments confirmed that Hg0 can be oxidized by MnO2 to form HgO and subsequently adsorbed on AC,leading to the high capability of MnO2/AC for Hg0 removal. |
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| Keywords: | MnO2/AC Hg0 adsorption oxidation activated coke |
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