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改性SCR催化剂对Hg0催化氧化性能的研究

赵莉 ,  何青松 ,  李琳 ,  陆强 ,  董长青 ,  杨勇平

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引用本文: 赵莉, 何青松, 李琳, 陆强, 董长青, 杨勇平. 改性SCR催化剂对Hg0催化氧化性能的研究[J]. 燃料化学学报, 2015, 43(5): 628-634. shu
Citation:  ZHAO Li, HE Qing-song, LI Lin, LU Qiang, DONG Chang-qing, YANG Yong-ping. Research on the catalytic oxidation of Hg0 by modified SCR catalysts[J]. Journal of Fuel Chemistry and Technology, 2015, 43(5): 628-634. shu

改性SCR催化剂对Hg0催化氧化性能的研究

    通讯作者: 赵莉(1969-), 女, 博士, 副教授, 主要从事燃煤污染物控制技术研究, E-mail: zhaoli9533@163.com。
  • 基金项目:

    国家重点基础研究发展规划(973计划, 2015CB251501) (973计划, 2015CB251501)

    中央高校基本科研业务费(2014ZD17)。 (2014ZD17)

摘要: 采用一系列金属氧化物对商用SCR催化剂进行掺杂改性,筛选出最优Ce掺杂SCR催化剂,模拟实际烟气组分,考察了Ce改性催化剂对烟气中Hg0氧化的影响。实验结果表明,Ce掺杂比例适当可显著提高其催化活性,Ce最佳负载量为9%时,Hg0的催化氧化效率比未掺杂SCR催化剂提高近40%,BET和XRD也显示,CeO2在催化剂表面分散程度较好,未出现聚集现象。烟气工况对Hg0的催化氧化具有重要影响,其中,烟气组分HCl显著促进了Ce改性催化剂对Hg0的氧化,在一定温度范围内,Hg0的氧化效率随着温度升高而增加,在最佳空速、温度和烟气组分浓度时,Hg0的催化氧化效率可达95.11%。此外,掺杂CeO2之后SCR催化剂的脱硝性能并未受到影响。

English

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  • 收稿日期:  2015-01-08
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