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

Research on the catalytic oxidation of Hg⁰ by modified SCR catalysts

1.
National Engineering Laboratory for Biomass Power Generation Equipment, North China Electric Power University, Beijing 102206, China

Corresponding author: ZHAO Li,
Received Date: 8 January 2015

Fund Project: 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)

A series of metal oxides were employed to modify the commercial SCR catalyst, and the Ce modified SCR catalyst was selected and then subjected to detailed catalytic oxidation of Hg⁰ by using the simulated flue gas. The results indicated that the catalytic activity of the catalyst was increased remarkably after the Ce modification, and the highest catalytic oxidation of Hg⁰ was obtained from the modified SCR catalyst with 9% Ce loading, being 40% higher than that of the non-modified SCR catalyst. The BET and XRD analysis indicated that the surface area of the 1%~9% Ce modified SCR catalyst was no significant change compared with the non-modified SCR catalyst, and the CeO₂ was well dispersed on the catalyst surface, without any aggregation. The flue gas condition had great effects on the Hg⁰ conversion. The catalytic oxidation of Hg⁰ would be significantly increased by HCl, and also increased as the increasing of the temperature in a certain range. The highest catalytic oxidation efficiency reached 95.11% at the optimal space velocity, temperature and flue gas components. In addition, the CeO₂ doping did not affect the denitration efficiency of the SCR catalyst.
- modified SCR catalyst,
- Hg⁰,
- catalytic oxidation
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Research on the catalytic oxidation of Hg0 by modified SCR catalysts

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通讯作者: 陈斌, bchen63@163.com

Research on the catalytic oxidation of Hg⁰ by modified SCR catalysts