Research advances in anti-water/sulfur/ammonium nitrate poisoning of ultra-low temperature denitrification catalysts
The strict control of nitrogen oxides (NO_x) is an urgent task for improving China′s air quality, and selective catalytic reduction (SCR) with ammonia represents the dominant method for treatment of NO_x exhaust from industries. As the focus of SCR denitrification shifts from thermal power plants to...
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Editorial Office of Energy Environmental Protection
2024-08-01
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| Series: | 能源环境保护 |
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| Online Access: | https://eep1987.com/en/article/5078 |
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| author | AN Dongqi CHENG Qianni SONG Wang ZHAO Yonggang SUN Jingfang* TANG Changjin* DONG Lin |
| author_facet | AN Dongqi CHENG Qianni SONG Wang ZHAO Yonggang SUN Jingfang* TANG Changjin* DONG Lin |
| author_sort | AN Dongqi |
| collection | DOAJ |
| description | The strict control of nitrogen oxides (NO_x) is an urgent task for improving China′s air quality, and selective catalytic reduction (SCR) with ammonia represents the dominant method for treatment of NO_x exhaust from industries. As the focus of SCR denitrification shifts from thermal power plants to non-electric industries such as steel and cement kilns, the overall working temperature of SCR shows an obvious shift to lower temperatures. Specifically, the flue gas temperature for denitrification is usually below 150 ℃ when a desulfurization treatment is pre-installed. Under these circumstances, achieving long-term and stable operation of denitrification catalysts becomes a pivotal challenge for the application of SCR technology. A decrease in reaction temperature can exacerbate not only water and sulfur poisoning but also induce new deactivation problems due to ammonium nitrate deposition. Therefore, this comprehensive review presents the research progress on the poisoning resistance of SCR catalysts under ultra-low temperatures. The paper starts with introducing the changes in denitrification performance caused by temperature reduction. After briefly describing catalyst deactivation and its characteristics, the main focus is on the developed poisoning resistance strategies against water/sulfur/ammonium nitrate. These strategies are discussed from the perspectives of denitrification catalyst structure modulation, combined purification process selection, and regulation of the reaction atmosphere. Furthermore, we introduce the research progress on anti-poisoning strategies and provide a discussion of anti-poisoning mechanism. Finally, considering the practical application requirements, a prospect for the future development direction of poisoning resistance studies in ultra-low temperature denitrification is presented. |
| format | Article |
| id | doaj-art-146a28fcabe74b4cb4c247f5a8dd5612 |
| institution | OA Journals |
| issn | 2097-4183 |
| language | zho |
| publishDate | 2024-08-01 |
| publisher | Editorial Office of Energy Environmental Protection |
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| series | 能源环境保护 |
| spelling | doaj-art-146a28fcabe74b4cb4c247f5a8dd56122025-08-20T01:54:34ZzhoEditorial Office of Energy Environmental Protection能源环境保护2097-41832024-08-0138412313510.20078/j.eep.20240605Research advances in anti-water/sulfur/ammonium nitrate poisoning of ultra-low temperature denitrification catalystsAN Dongqi0CHENG Qianni1SONG Wang2ZHAO Yonggang3SUN Jingfang* 4TANG Changjin*5DONG Lin6Jiangsu Key Laboratory of Vehicle Emissions Control, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, ChinaSchool of Environment, Nanjing University, Nanjing 210023, ChinaJiangsu Key Laboratory of Vehicle Emissions Control, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, ChinaJiangsu Ningtian Environmental Technology Co., Ltd., Nanjing 210019, ChinaCenter of Modern Analysis, Nanjing University, Nanjing 210023, ChinaJiangsu Province Engineering Research Center of Environmental Risk Prevention and Emergency Response1. Jiangsu Key Laboratory of Vehicle Emissions Control, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China; 2. School of Environment, Nanjing University, Nanjing 210023, ChinaThe strict control of nitrogen oxides (NO_x) is an urgent task for improving China′s air quality, and selective catalytic reduction (SCR) with ammonia represents the dominant method for treatment of NO_x exhaust from industries. As the focus of SCR denitrification shifts from thermal power plants to non-electric industries such as steel and cement kilns, the overall working temperature of SCR shows an obvious shift to lower temperatures. Specifically, the flue gas temperature for denitrification is usually below 150 ℃ when a desulfurization treatment is pre-installed. Under these circumstances, achieving long-term and stable operation of denitrification catalysts becomes a pivotal challenge for the application of SCR technology. A decrease in reaction temperature can exacerbate not only water and sulfur poisoning but also induce new deactivation problems due to ammonium nitrate deposition. Therefore, this comprehensive review presents the research progress on the poisoning resistance of SCR catalysts under ultra-low temperatures. The paper starts with introducing the changes in denitrification performance caused by temperature reduction. After briefly describing catalyst deactivation and its characteristics, the main focus is on the developed poisoning resistance strategies against water/sulfur/ammonium nitrate. These strategies are discussed from the perspectives of denitrification catalyst structure modulation, combined purification process selection, and regulation of the reaction atmosphere. Furthermore, we introduce the research progress on anti-poisoning strategies and provide a discussion of anti-poisoning mechanism. Finally, considering the practical application requirements, a prospect for the future development direction of poisoning resistance studies in ultra-low temperature denitrification is presented.https://eep1987.com/en/article/5078scrultra-low temperature denitrificationdenitrification catalystspoisoning resistanceammonium nitrate |
| spellingShingle | AN Dongqi CHENG Qianni SONG Wang ZHAO Yonggang SUN Jingfang* TANG Changjin* DONG Lin Research advances in anti-water/sulfur/ammonium nitrate poisoning of ultra-low temperature denitrification catalysts 能源环境保护 scr ultra-low temperature denitrification denitrification catalysts poisoning resistance ammonium nitrate |
| title | Research advances in anti-water/sulfur/ammonium nitrate poisoning of ultra-low temperature denitrification catalysts |
| title_full | Research advances in anti-water/sulfur/ammonium nitrate poisoning of ultra-low temperature denitrification catalysts |
| title_fullStr | Research advances in anti-water/sulfur/ammonium nitrate poisoning of ultra-low temperature denitrification catalysts |
| title_full_unstemmed | Research advances in anti-water/sulfur/ammonium nitrate poisoning of ultra-low temperature denitrification catalysts |
| title_short | Research advances in anti-water/sulfur/ammonium nitrate poisoning of ultra-low temperature denitrification catalysts |
| title_sort | research advances in anti water sulfur ammonium nitrate poisoning of ultra low temperature denitrification catalysts |
| topic | scr ultra-low temperature denitrification denitrification catalysts poisoning resistance ammonium nitrate |
| url | https://eep1987.com/en/article/5078 |
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