Transformation and Migrant Mechanism of Sulfur and Nitrogen during Chemical Looping Combustion with CuFe<sub>2</sub>O<sub>4</sub>
Chemical looping combustion (CLC) is a key technology for capturing CO<sub>2</sub>. Different types of oxygen carrier (OC) particles are used in coal CLC. The migration and transformation behaviors of sulfur and nitrogen are basically the same when CaFe<sub>2</sub>O<sub>...
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| Format: | Article |
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MDPI AG
2022-05-01
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| Series: | Atmosphere |
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| Online Access: | https://www.mdpi.com/2073-4433/13/5/786 |
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| author | Haichuan Li Ziheng Han Chenye Hu Jingjing Ma Qingjie Guo |
| author_facet | Haichuan Li Ziheng Han Chenye Hu Jingjing Ma Qingjie Guo |
| author_sort | Haichuan Li |
| collection | DOAJ |
| description | Chemical looping combustion (CLC) is a key technology for capturing CO<sub>2</sub>. Different types of oxygen carrier (OC) particles are used in coal CLC. The migration and transformation behaviors of sulfur and nitrogen are basically the same when CaFe<sub>2</sub>O<sub>4</sub> and Fe<sub>2</sub>O<sub>3</sub>/Al<sub>2</sub>O<sub>3</sub> are used as OC. CLC can be divided into two reaction stages: coal pyrolysis and char gasification; SO<sub>2</sub> and NO show bimodal release characteristics, both of which show a basic trend of rising first and then falling down. The contents of H<sub>2</sub>S and NO<sub>2</sub> increased rapidly at the beginning of the reaction and then decreased slowly at the stage of char gasification. H<sub>2</sub>S is released rapidly during coal pyrolysis and discharged from the reactor with flue gas, and then part of H<sub>2</sub>S is converted to SO<sub>2</sub> during the char gasification stage by OC particles. NO can be oxidized by OC particles and form NO<sub>2</sub>. The increase in the reaction temperature and oxygen-to-carbon ratio (O/C) contributes to the release of sulfur and nitrogen and higher reaction temperature and O/C can inhibit the formation of metal sulfide. O<sub>2</sub> released by CuFe<sub>2</sub>O<sub>4</sub> significantly increases the contents of SO<sub>2</sub>, H<sub>2</sub>S, NO and NO<sub>2</sub> in flue gas. This work is helpful for improving control strategies for pollutants. |
| first_indexed | 2024-03-10T03:21:58Z |
| format | Article |
| id | doaj.art-edd8efda433e4a47bbfe89be120491c1 |
| institution | Directory Open Access Journal |
| issn | 2073-4433 |
| language | English |
| last_indexed | 2024-03-10T03:21:58Z |
| publishDate | 2022-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Atmosphere |
| spelling | doaj.art-edd8efda433e4a47bbfe89be120491c12023-11-23T10:02:50ZengMDPI AGAtmosphere2073-44332022-05-0113578610.3390/atmos13050786Transformation and Migrant Mechanism of Sulfur and Nitrogen during Chemical Looping Combustion with CuFe<sub>2</sub>O<sub>4</sub>Haichuan Li0Ziheng Han1Chenye Hu2Jingjing Ma3Qingjie Guo4State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering, Ningxia University, Yinchuan 750021, ChinaState Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering, Ningxia University, Yinchuan 750021, ChinaState Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering, Ningxia University, Yinchuan 750021, ChinaState Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering, Ningxia University, Yinchuan 750021, ChinaState Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering, Ningxia University, Yinchuan 750021, ChinaChemical looping combustion (CLC) is a key technology for capturing CO<sub>2</sub>. Different types of oxygen carrier (OC) particles are used in coal CLC. The migration and transformation behaviors of sulfur and nitrogen are basically the same when CaFe<sub>2</sub>O<sub>4</sub> and Fe<sub>2</sub>O<sub>3</sub>/Al<sub>2</sub>O<sub>3</sub> are used as OC. CLC can be divided into two reaction stages: coal pyrolysis and char gasification; SO<sub>2</sub> and NO show bimodal release characteristics, both of which show a basic trend of rising first and then falling down. The contents of H<sub>2</sub>S and NO<sub>2</sub> increased rapidly at the beginning of the reaction and then decreased slowly at the stage of char gasification. H<sub>2</sub>S is released rapidly during coal pyrolysis and discharged from the reactor with flue gas, and then part of H<sub>2</sub>S is converted to SO<sub>2</sub> during the char gasification stage by OC particles. NO can be oxidized by OC particles and form NO<sub>2</sub>. The increase in the reaction temperature and oxygen-to-carbon ratio (O/C) contributes to the release of sulfur and nitrogen and higher reaction temperature and O/C can inhibit the formation of metal sulfide. O<sub>2</sub> released by CuFe<sub>2</sub>O<sub>4</sub> significantly increases the contents of SO<sub>2</sub>, H<sub>2</sub>S, NO and NO<sub>2</sub> in flue gas. This work is helpful for improving control strategies for pollutants.https://www.mdpi.com/2073-4433/13/5/786chemical looping combustionsulfurnitrogenoxygen carrier particles |
| spellingShingle | Haichuan Li Ziheng Han Chenye Hu Jingjing Ma Qingjie Guo Transformation and Migrant Mechanism of Sulfur and Nitrogen during Chemical Looping Combustion with CuFe<sub>2</sub>O<sub>4</sub> Atmosphere chemical looping combustion sulfur nitrogen oxygen carrier particles |
| title | Transformation and Migrant Mechanism of Sulfur and Nitrogen during Chemical Looping Combustion with CuFe<sub>2</sub>O<sub>4</sub> |
| title_full | Transformation and Migrant Mechanism of Sulfur and Nitrogen during Chemical Looping Combustion with CuFe<sub>2</sub>O<sub>4</sub> |
| title_fullStr | Transformation and Migrant Mechanism of Sulfur and Nitrogen during Chemical Looping Combustion with CuFe<sub>2</sub>O<sub>4</sub> |
| title_full_unstemmed | Transformation and Migrant Mechanism of Sulfur and Nitrogen during Chemical Looping Combustion with CuFe<sub>2</sub>O<sub>4</sub> |
| title_short | Transformation and Migrant Mechanism of Sulfur and Nitrogen during Chemical Looping Combustion with CuFe<sub>2</sub>O<sub>4</sub> |
| title_sort | transformation and migrant mechanism of sulfur and nitrogen during chemical looping combustion with cufe sub 2 sub o sub 4 sub |
| topic | chemical looping combustion sulfur nitrogen oxygen carrier particles |
| url | https://www.mdpi.com/2073-4433/13/5/786 |
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