Purification Technologies for NOx Removal from Flue Gas: A Review
Nitrogen oxide (NOx) is a major gaseous pollutant in flue gases from power plants, industrial processes, and waste incineration that can have adverse impacts on the environment and human health. Many denitrification (de-NOx) technologies have been developed to reduce NOx emissions in the past severa...
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| Format: | Article |
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MDPI AG
2022-10-01
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| Online Access: | https://www.mdpi.com/2297-8739/9/10/307 |
| _version_ | 1797469952710541312 |
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| author | Zihan Zhu Bin Xu |
| author_facet | Zihan Zhu Bin Xu |
| author_sort | Zihan Zhu |
| collection | DOAJ |
| description | Nitrogen oxide (NOx) is a major gaseous pollutant in flue gases from power plants, industrial processes, and waste incineration that can have adverse impacts on the environment and human health. Many denitrification (de-NOx) technologies have been developed to reduce NOx emissions in the past several decades. This paper provides a review of the recent literature on NOx post-combustion purification methods with different reagents. From the perspective of changes in the valence of nitrogen (N), purification technologies against NOx in flue gas are classified into three approaches: oxidation, reduction, and adsorption/absorption. The removal processes, mechanisms, and influencing factors of each method are systematically reviewed. In addition, the main challenges and potential breakthroughs of each method are discussed in detail and possible directions for future research activities are proposed. This review provides a fundamental and systematic understanding of the mechanisms of denitrification from flue gas and can help researchers select high-performance and cost-effective methods. |
| first_indexed | 2024-03-09T19:30:13Z |
| format | Article |
| id | doaj.art-e8712471e5b54ce6b1fc388c1f9eaece |
| institution | Directory Open Access Journal |
| issn | 2297-8739 |
| language | English |
| last_indexed | 2024-03-09T19:30:13Z |
| publishDate | 2022-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Separations |
| spelling | doaj.art-e8712471e5b54ce6b1fc388c1f9eaece2023-11-24T02:32:36ZengMDPI AGSeparations2297-87392022-10-0191030710.3390/separations9100307Purification Technologies for NOx Removal from Flue Gas: A ReviewZihan Zhu0Bin Xu1State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, ChinaState Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, ChinaNitrogen oxide (NOx) is a major gaseous pollutant in flue gases from power plants, industrial processes, and waste incineration that can have adverse impacts on the environment and human health. Many denitrification (de-NOx) technologies have been developed to reduce NOx emissions in the past several decades. This paper provides a review of the recent literature on NOx post-combustion purification methods with different reagents. From the perspective of changes in the valence of nitrogen (N), purification technologies against NOx in flue gas are classified into three approaches: oxidation, reduction, and adsorption/absorption. The removal processes, mechanisms, and influencing factors of each method are systematically reviewed. In addition, the main challenges and potential breakthroughs of each method are discussed in detail and possible directions for future research activities are proposed. This review provides a fundamental and systematic understanding of the mechanisms of denitrification from flue gas and can help researchers select high-performance and cost-effective methods.https://www.mdpi.com/2297-8739/9/10/307flue gas purificationNOx removaloxidationreductionabsorptionadsorption |
| spellingShingle | Zihan Zhu Bin Xu Purification Technologies for NOx Removal from Flue Gas: A Review Separations flue gas purification NOx removal oxidation reduction absorption adsorption |
| title | Purification Technologies for NOx Removal from Flue Gas: A Review |
| title_full | Purification Technologies for NOx Removal from Flue Gas: A Review |
| title_fullStr | Purification Technologies for NOx Removal from Flue Gas: A Review |
| title_full_unstemmed | Purification Technologies for NOx Removal from Flue Gas: A Review |
| title_short | Purification Technologies for NOx Removal from Flue Gas: A Review |
| title_sort | purification technologies for nox removal from flue gas a review |
| topic | flue gas purification NOx removal oxidation reduction absorption adsorption |
| url | https://www.mdpi.com/2297-8739/9/10/307 |
| work_keys_str_mv | AT zihanzhu purificationtechnologiesfornoxremovalfromfluegasareview AT binxu purificationtechnologiesfornoxremovalfromfluegasareview |