Influence of NH<sub>3</sub> on Hg<sup>0</sup> Oxidation Performance of SCR Catalyst

Qiyu WENG; Duanle LI; Yuqun ZHUO

doi:10.12096/j.2096-4528.pgt.20059

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Influence of NH₃ on Hg⁰ Oxidation Performance of SCR Catalyst

Factory Green Island and Digital Twin Technology | 更新时间：2025-07-04

- Influence of NH₃ on Hg⁰ Oxidation Performance of SCR Catalyst
- Power Generation Technology Vol. 41, Issue 5, Pages: 471-479(2020)
- 作者机构：
  
  热科学与动力工程教育部重点实验室(清华大学能源与动力工程系), 北京市海淀区 100084
- 作者简介：
- 基金信息：
  
  National Key Research and Development Program of China(2016YFB0600603)
- DOI：10.12096/j.2096-4528.pgt.20059
  CLC： TK09
- Received：31 July 2020，
  
  Published：31 October 2020
- 稿件说明：
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Qiyu WENG, Duanle LI, Yuqun ZHUO. Influence of NH₃ on Hg⁰ Oxidation Performance of SCR Catalyst[J]. Power Generation Technology, 2020, 41(5): 471-479.
DOI：

Qiyu WENG, Duanle LI, Yuqun ZHUO. Influence of NH₃ on Hg⁰ Oxidation Performance of SCR Catalyst[J]. Power Generation Technology, 2020, 41(5): 471-479. DOI： 10.12096/j.2096-4528.pgt.20059.

摘要

作为我国主要的汞污染源之一，燃煤电厂汞污染物排放控制是我国环保标准的要求。通过改性SCR催化剂和卤化物添加等方法将Hg

氧化为Hg

，进而通过后续设备进行脱除，是提高汞脱除率的有效方法。但对我国而言，这类结合现有环保设备的联合脱除方法都面临着SCR入口高浓度NH

的抑制作用。为此，基于文献调研，总结了NH

对SCR催化剂Hg

氧化性能的影响，以及卤素存在条件下NH

对Hg

氧化性能的影响，分析了改性催化剂及卤化物添加对Hg

氧化率的提高机理，进而对应地分析了NH

对Hg

氧化的抑制机理。研究结果为实际燃煤电厂提高SCR设备Hg

氧化率提供了参考。

Abstract

As one of the main sources of mercury pollution in China

the emission control of mercury pollutants from coal-fired power plants is the requirement of China's environmental protection standards. Hg

is oxidized to Hg

by means of modified SCR catalyst and halide addition in coal

and then removed by subsequent equipment

which are effective methods to improve mercury removal rate. For these methods based on air pollution control device (APCD) in China

the inhibition of high concentration NH

at SCR inlet is a problem to solve. Therefore

based on literature research

the influence of ammonia injection on Hg

oxidation performance under the combined effect of SCR catalyst and halide addition in coal was concluded. The mechanism of improving Hg

oxidation rate by modified catalyst and halide addition was analyzed. The corresponding inhibition mechanism of NH

on Hg

oxidation was also analyzed. The research results provide a reference for the coal-fired power plants to improve Hg

oxidation rate of SCR.

关键词

Keywords

references

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AI问答

⁰

Influence of NH3 on Hg0 Oxidation Performance of SCR Catalyst

DOI：10.12096/j.2096-4528.pgt.20059

摘要

Abstract

关键词

Keywords

references

Influence of NH₃ on Hg⁰ Oxidation Performance of SCR Catalyst