NH<sub>3</sub>对SCR催化剂Hg<sup>0</sup>催化氧化性能的影响

翁麒宇; 李端乐; 禚玉群

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

欢迎来到能源电力期刊网！

English Version 读者登录期刊登录

您当前的位置：

首页 >

文章列表页 >

NH₃对SCR催化剂Hg⁰催化氧化性能的影响

厂界环保岛与数字孪生技术 | 更新时间：2025-07-04

- NH₃对SCR催化剂Hg⁰催化氧化性能的影响
- Influence of NH₃ on Hg⁰ Oxidation Performance of SCR Catalyst
- 发电技术 2020年41卷第5期页码：471-479
- 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：
  
  [ "翁麒宇(1995), 男, 博士研究生, 主要研究方向为汞等重金属污染物的迁移转化和排放控制, wqy17@mails.tsinghua.edu.cn" ]
  [ "李端乐(1988), 男, 博士, 助理研究员, 主要研究方向为燃煤污染物控制、固废利用与绿色胶凝材料, liduanle@163.com" ]
  禚玉群(1969), 男, 博士, 教授, 主要研究方向为SOx、NOx等多种污染物联合脱除, 汞等重金属污染物的迁移转化和排放控制, 本文通信作者, zhuoyq@mail.tsinghua.edu.cn
- 基金信息：
  
  国家重点研发计划项目(2016YFB0600603)
- DOI：10.12096/j.2096-4528.pgt.20059
  中图分类号： TK09
- 收稿：2020-07-31，
  
  纸质出版：2020-10-31
- 稿件说明：
移动端阅览
翁麒宇, 李端乐, 禚玉群. NH₃对SCR催化剂Hg⁰催化氧化性能的影响[J]. 发电技术, 2020,41(5):471-479.

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.
翁麒宇, 李端乐, 禚玉群. NH₃对SCR催化剂Hg⁰催化氧化性能的影响[J]. 发电技术, 2020,41(5):471-479. DOI： 10.12096/j.2096-4528.pgt.20059.

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

陈招妹, 刘含笑, 崔盈, 等.燃煤电厂烟气中Hg的生成、治理、测试及排放特征研究[J].发电技术, 2019, 40(4):355-361.

Chen Z M, Liu H X, Cui Y, et al.Study on generation, treatment, testing and emission characteristics of Hg in flue gas of coal-fired power plants[J].Power Generation Technology, 2019, 40(4):355-361.

环境保护部, 国家质量监督检验检疫总局.火电厂大气污染物排放标准: GB 13223-2011[S].北京: 中国环境科学出版社, 2011.

MEP, AQSIQ.Emission standard of air pollutants for thermal power plants: GB 13223-2011[S].Beijing: China Environmental Press, 2011.

Galbreath K C, Zygarlicke C J.Mercury transformations in coal combustion flue gas[J].Fuel Processing Technology, 2000, 65/66:289-310.

虞上长, 白亮, 李文华, 等.燃煤电厂烟气多污染物深度测试研究[J].广东电力, 2019, 32(7):1-7.

Yu S C, Bai L, Li W H, et al.Study on depth test of flue gas pollutants in coal-fired power plant[J].Guangdong Electric Power, 2019, 32(7):1-7.

Pudasainee D, Kim J H, Seo Y C.Mercury emission trend influenced by stringent air pollutants regulation for coal-fired power plants in Korea[J].Atmospheric Environment, 2009, 43(39):6254-6259.

商永强, 赵永椿.磁性吸附剂脱汞机理及技术研究进展[J].华电技术, 2019, 41(12):8-15.

Shang Y Q, Zhao Y C.Mechanism and technology development of magnetic adsorbent for mercury removal[J].Huadian Technology, 2019, 41(12):8-15.

Zhang L, Zhuo Y, Chen L,et al.Mercury emissions from six coal-fired power plants in China[J].Fuel Processing Technology, 2008, 89(11):1033-1040.

Huang W J, Xu H M, Qu Z, et al.Significance of Fe 2 O 3 modified SCR catalyst for gas-phase elemental mercury oxidation in coal-fired flue gas[J ] .Fuel Processing Technology, 2016, 149:23-28..

Wang S, Zhang L, Li G H, et al.Mercury emission and speciation of coal-fired power plants in China[J].Atmospheric Chemistry and Physics, 2010, 10:1183-1192.

Eswaran S, Stenger H G.Effect of halogens on mercury conversion in SCR catalysts[J].Fuel Processing Technology, 2008, 89:1153-1159.

Cao Y, Gao Z, Zhu J, et al.Impacts of halogen additions on mercury oxidation, in a slipstream selective catalyst reduction (SCR), reactor when burning sub-bituminous coal[J].Environmental Science&Technology, 2008, 42:256-261.

池桂龙, 沈伯雄, 朱少文, 等.改性SCR催化剂对单质汞氧化性能的研究[J].燃料化学学报, 2016, 44(6):763-768.

Chi G L, Shen B X, Zhu S W, et al.Oxidation of elemental mercury over modified SCR catalysts[J].Journal of Fuel Chemistry and Technology, 2016, 44(6):763-768.

Yan N, Chen W, Chen J, et al.Significance of RuO 2 modified SCR catalyst for elemental mercury oxidation in coal-fired flue gas[J ] .Environmental Science & Technology, 2011, 45(13):5725-5730.

Zhao L, Li C, Zhang J, et al.Promotional effect of CeO 2 modified support on V 2 O 5 -WO 3 /TiO 2 catalyst for elemental mercury oxidation in simulated coal-fired flue gas[J ] .Fuel, 2015, 153:361-369..

Zhao L, Li C, Wang Y, et al.Simultaneous removal of elemental mercury and NO from simulated flue gas using a CeO 2 modified V 2 O 5 -WO 3 /TiO 2 catalyst[J ] .Catalysis Science & Technology, 2016(6):6076-6086..

Eswaran S, Stenger H G.Understanding mercury conversion in selective catalytic reduction (SCR) catalysts[J].Energy&Fuels, 2005, 19:2328-2334.

Zhang Z, Li C, Zhao L, et al.Simultaneous removal of elemental mercury and NO from flue gas by V 2 O 5 -CeO 2 /TiO 2 catalysts[J ] .Applied Surface Science, 2015, 347:392-400..

Li H, Wu S, Li L, et al.CuO-CeO 2 /TiO 2 catalyst for simultaneous NO reduction and Hg 0 oxidation at low temperatures[J ] .Catalysis Science & Technology, 2015, 5:5129-5138..

Wan Q, Yao Q, Duan L, et al.Comparison of elemental mercury oxidation across vanadium and cerium based catalysts in coal combustion flue gas:catalytic performances and particulate matter effects[J].Environmental Science&Technology, 2018, 52:2981-2987.

Li D, Weng Q, Qin Y, et al.Hg 0 catalytic oxidation by HBr over Ce-modified regenerated selective catalytic reduction catalyst[J ] .Fuel, 2020, 276:118149.

He S, Zhou J, Zhu Y, et al.Mercury oxidation over a vanadia-based selective catalytic reduction catalyst[J].Energy&Fuels, 2009, 23:253-259.

徐晓涛, 张强, 杨世极, 等.温度及盐酸浓度对改性SCR催化剂汞氧化能力的影响[J].热力发电, 2013, 42(7):60-64.

Xu X T, Zhang Q, Yang S J, et al.Effect of temperature and hydrochloric acid concentration on mercury oxidation ability of modified scr catalyst[J].Thermal Power Generation, 2013, 42(7):60-64.

Kamata H, Ueno S, Naito T, et al.Mercury oxidation over the V 2 O 5 (WO 3 )/TiO 2 commercial SCR catalyst[J ] .Industrial & Engineering Chemistry Research, 2008, 47:8136-8141..

Yang J, Yang Q, Sun J, et al.Effects of mercury oxidation on V 2 O 5 -WO 3 /TiO 2 catalyst properties in NH 3 -SCR process[J ] .Catalysis Communications, 2015, 59:78-82..

Li H, Wu C, Li Y, et al.CeO 2 /TiO 2 catalysts for catalytic oxidation of elemental mercury in low-rank coal combustion flue gas[J ] .Environmental Science & Technology, 2011, 45:7394-7400..

Qi G, Yang R T, Chang R.Low-temperature SCR of NO with NH 3 over USY-supported manganese oxide-based catalysts[J ] .Catalysis Letters, 2003, 87:67-71.

Yang Y, Liu J, Wang Z, et al.Homogeneousand heterogeneous reaction mechanisms and kinetics of mercury oxidation in coal-fired flue gas with bromine addition[J].Proceedings of the Combustion Institute, 2017, 36:4039-4049.

Otten B V, Buitrago P A, Senior C L, et al.Gas-phase oxidation of mercury by bromine and chlorine in flue gas[J].Energy&Fuels, 2011, 25:3530-3536.

Zhao S, Duan Y, Zhou Q, et al.Effects of NH 4 Br additive on mercury transformation and removal during CFB coal combustion[J ] .Journal of Chemical Technology & Biotechnology, 2017, 92(2):391-398.

陶叶, 禚玉群, 刘晶, 等.燃煤烟气中汞均相氧化的数值模拟[J].化工学报, 2011, 62(1):186-191.

Tao Y, Zhuo Y Q, Liu J, et al.Numerical modeling of mercury homogeneous oxidation in coal-fired flue gas[J].CIESC Journal, 2011, 62(1):186-191.

Li Y, Murphy D, Wu C, et al.Development of silica/vanadia/titania catalysts for removal of elemental mercury from coal-combustion flue gas[J].Environmental Science&Technology, 2008, 42:5304-5309.

Wang Z, Liu J, Zhang B, et al.Mechanism of heterogeneous mercury oxidation by HBr over V 2 O 5 /TiO 2 catalyst[J ] .Environmental Science & Technology, 2016, 50(10):5398-5404..

Niksa S, Naik C V, Berry M S, et al.Interpreting enhanced Hg oxidation with Br addition at Plant Miller[J].Fuel Processing Technology, 2009, 90:1372-1377.

Dranga B A, Lazar L, Koeser H.Oxidation catalysts for elemental mercury in flue gases:a review[J].Catalysts, 2012, 2(1):139-170.

浏览量

下载量

CSCD

文章被引用时，请邮件提醒。

提交

工具集

关联资源

基于K-Means聚类与Ridge回归算法的煤炭发热量预测研究

SCR外置烟道飞灰沉积特性与流场优化数值仿真

电厂燃煤飞灰固化脱硫污泥重金属铅特性研究

碳捕集技术应用对燃煤机组调峰能力的影响

燃煤电厂脱硫废水辅助煤电解制氢

NH3对SCR催化剂Hg0催化氧化性能的影响

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

NH₃对SCR催化剂Hg⁰催化氧化性能的影响

Influence of NH₃ on Hg⁰ Oxidation Performance of SCR Catalyst