| Ce掺杂低钒V2O5-WO3/TiO2催化剂脱除烟气元素汞的研究 |
| 摘要点击 4777 全文点击 2610 投稿时间：2010-12-08 修订日期：2011-01-12 |
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| 中文关键词 汞脱除 铈掺杂 低矾 烟气 吸附 |
| 英文关键词 mercury removal cerium doped low vanadium flue gas adsorption |
| DOI |
| 作者 | 单位 | | 万奇 | 清华大学环境学院, 环境模拟与污染控制国家重点联合实验室, 北京 100084 | | 段雷 | 清华大学环境学院, 环境模拟与污染控制国家重点联合实验室, 北京 100084 | | 贺克斌 | 清华大学环境学院, 环境模拟与污染控制国家重点联合实验室, 北京 100084 | | 陈亮 | 清华大学环境学院, 环境模拟与污染控制国家重点联合实验室, 北京 100084 | | 李俊华 | 清华大学环境学院, 环境模拟与污染控制国家重点联合实验室, 北京 100084 |
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| 中文摘要 |
| 制备了Ce掺杂的低矾V2O5-WO3/TiO2催化剂，在模拟燃煤烟气条件下开展Hg0的脱除实验.结果表明该催化剂具有很好的Hg0脱除能力，在200～500℃的温度范围内能脱除烟气中95%的Hg0.催化剂表征结果表明，比表面积、 孔容和孔径与汞脱除能力没有显著相关性.XPS的结果表明，催化剂表面的Ce是以Ce4+的形式存在，有利于Hg0的脱除反应.抗硫抗水实验表明，H2O会轻微抑制Hg0的脱除反应，主要原因是H2O和Hg0在样品表面的竞争吸附；SO2会促进Hg0的脱除反应，原因是SO2能增加样品表面的酸吸附位且增加表面Hg0的吸附量. |
| 英文摘要 |
| This paper discussed a recent study of mercury removal by gaseous hydrogen chloride over novel Ce doped low vanadium V2O5-WO3/TiO2 catalysts under a bench scale condition. The performances on Hg0 removal over the catalyst were tested in simulated flue gas with 80-100μg·m-3Hg0, 8% O2, 10×10-6 HCl, 8% H2O, 800×10-6SO2 and balanced with N2. Results showed that about 95% of Hg0 could be removed. According to the characterization results, BET surface areas had not significant influence on catalytic performance. XPS results indicated that Ce4+oxide was a mainly form in the catalysts surface, which was beneficial for Hg0 removal reactions. Water vapor slightly inhibited Hg0 removal efficiency, due to the competitive adsorption, however, SO2 promoted the oxidation reactions, resulting in higher removal efficiencies. |
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