Preparation,characterization and NO/NO<sub>2</sub> catalytic reduction performance of MnO<sub>2</sub>-Fe<sub>2</sub>O<sub>3</sub>-CeO<sub>2</sub>/Al<sub>2</sub>O<sub>3</sub> nanocatalysts with different manganese contents
Reducing NO<sub><i>x</i></sub> emission in the exhaust gas under the extremely low temperature of engine cold start was important for the ecological environment and human health.MnO<sub>2</sub> has high catalytic activity for NO<sub><i>x</i></...
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| Format: | Article |
| Language: | zho |
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Journal of Materials Engineering
2021-03-01
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| Series: | Cailiao gongcheng |
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| Online Access: | http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2020.000087 |
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| author | GAO Yan FENG Wen-chen LUAN Tao CHEN Bao-ming ZHANG Wen-ke LI Shi-jie CHI Shi-dan |
| author_facet | GAO Yan FENG Wen-chen LUAN Tao CHEN Bao-ming ZHANG Wen-ke LI Shi-jie CHI Shi-dan |
| author_sort | GAO Yan |
| collection | DOAJ |
| description | Reducing NO<sub><i>x</i></sub> emission in the exhaust gas under the extremely low temperature of engine cold start was important for the ecological environment and human health.MnO<sub>2</sub> has high catalytic activity for NO<sub><i>x</i></sub> in the low temperature range, which is a promising nanocatalyst.The intrinsic relationship between the surface structural characteristics and denitrification activity of MnO<sub>2</sub>-Fe<sub>2</sub>O<sub>3</sub>-CeO<sub>2</sub>/Al<sub>2</sub>O<sub>3</sub> nanocatalysts produced by ultrasonic assisted coprecipitation method with different manganese contents was discussed. The results show that when the manganese content is 15%(mass fraction), the nanocatalyst has the largest specific surface area and the smallest grain size. At the same time, the distribution of active substances is the most uniform. Meanwhile, the crystallinity of metal oxides is suppressed, and Mn, Fe and Ce are in the best coexistence state, which can promote the enrichment of chemisorption oxygen. The catalytic oxidation of NO to NO<sub>2</sub> improves the reaction rate of fast SCR, and the NO<sub>2</sub> conversion reaches 88.5% at 50 ℃. Optimizing manganese content is an extremely effective method to improve the structure-activity relationship of catalytic materials and promote the performance of NO preoxidation and fast SCR reaction. |
| first_indexed | 2024-04-11T03:48:01Z |
| format | Article |
| id | doaj.art-d55379f3b1d040b580e7397af5a6c5e2 |
| institution | Directory Open Access Journal |
| issn | 1001-4381 1001-4381 |
| language | zho |
| last_indexed | 2024-04-11T03:48:01Z |
| publishDate | 2021-03-01 |
| publisher | Journal of Materials Engineering |
| record_format | Article |
| series | Cailiao gongcheng |
| spelling | doaj.art-d55379f3b1d040b580e7397af5a6c5e22023-01-02T02:21:53ZzhoJournal of Materials EngineeringCailiao gongcheng1001-43811001-43812021-03-0149311512410.11868/j.issn.1001-4381.2020.00008720210314Preparation,characterization and NO/NO<sub>2</sub> catalytic reduction performance of MnO<sub>2</sub>-Fe<sub>2</sub>O<sub>3</sub>-CeO<sub>2</sub>/Al<sub>2</sub>O<sub>3</sub> nanocatalysts with different manganese contentsGAO Yan0FENG Wen-chen1LUAN Tao2CHEN Bao-ming3ZHANG Wen-ke4LI Shi-jie5CHI Shi-dan6School of Thermal Engineering, Shandong Jianzhu University, Jinan 250101, ChinaSchool of Energy and Power Engineering, Shandong University, Jinan 250061, ChinaSchool of Energy and Power Engineering, Shandong University, Jinan 250061, ChinaSchool of Thermal Engineering, Shandong Jianzhu University, Jinan 250101, ChinaSchool of Thermal Engineering, Shandong Jianzhu University, Jinan 250101, ChinaSchool of Thermal Engineering, Shandong Jianzhu University, Jinan 250101, ChinaSchool of Energy and Power Engineering, Shandong University, Jinan 250061, ChinaReducing NO<sub><i>x</i></sub> emission in the exhaust gas under the extremely low temperature of engine cold start was important for the ecological environment and human health.MnO<sub>2</sub> has high catalytic activity for NO<sub><i>x</i></sub> in the low temperature range, which is a promising nanocatalyst.The intrinsic relationship between the surface structural characteristics and denitrification activity of MnO<sub>2</sub>-Fe<sub>2</sub>O<sub>3</sub>-CeO<sub>2</sub>/Al<sub>2</sub>O<sub>3</sub> nanocatalysts produced by ultrasonic assisted coprecipitation method with different manganese contents was discussed. The results show that when the manganese content is 15%(mass fraction), the nanocatalyst has the largest specific surface area and the smallest grain size. At the same time, the distribution of active substances is the most uniform. Meanwhile, the crystallinity of metal oxides is suppressed, and Mn, Fe and Ce are in the best coexistence state, which can promote the enrichment of chemisorption oxygen. The catalytic oxidation of NO to NO<sub>2</sub> improves the reaction rate of fast SCR, and the NO<sub>2</sub> conversion reaches 88.5% at 50 ℃. Optimizing manganese content is an extremely effective method to improve the structure-activity relationship of catalytic materials and promote the performance of NO preoxidation and fast SCR reaction.http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2020.000087manganese oxidenitrogen oxideiron oxidenanocatalystceo<sub>2</sub>al<sub>2</sub>o<sub>3</sub> |
| spellingShingle | GAO Yan FENG Wen-chen LUAN Tao CHEN Bao-ming ZHANG Wen-ke LI Shi-jie CHI Shi-dan Preparation,characterization and NO/NO<sub>2</sub> catalytic reduction performance of MnO<sub>2</sub>-Fe<sub>2</sub>O<sub>3</sub>-CeO<sub>2</sub>/Al<sub>2</sub>O<sub>3</sub> nanocatalysts with different manganese contents Cailiao gongcheng manganese oxide nitrogen oxide iron oxide nanocatalyst ceo<sub>2</sub> al<sub>2</sub>o<sub>3</sub> |
| title | Preparation,characterization and NO/NO<sub>2</sub> catalytic reduction performance of MnO<sub>2</sub>-Fe<sub>2</sub>O<sub>3</sub>-CeO<sub>2</sub>/Al<sub>2</sub>O<sub>3</sub> nanocatalysts with different manganese contents |
| title_full | Preparation,characterization and NO/NO<sub>2</sub> catalytic reduction performance of MnO<sub>2</sub>-Fe<sub>2</sub>O<sub>3</sub>-CeO<sub>2</sub>/Al<sub>2</sub>O<sub>3</sub> nanocatalysts with different manganese contents |
| title_fullStr | Preparation,characterization and NO/NO<sub>2</sub> catalytic reduction performance of MnO<sub>2</sub>-Fe<sub>2</sub>O<sub>3</sub>-CeO<sub>2</sub>/Al<sub>2</sub>O<sub>3</sub> nanocatalysts with different manganese contents |
| title_full_unstemmed | Preparation,characterization and NO/NO<sub>2</sub> catalytic reduction performance of MnO<sub>2</sub>-Fe<sub>2</sub>O<sub>3</sub>-CeO<sub>2</sub>/Al<sub>2</sub>O<sub>3</sub> nanocatalysts with different manganese contents |
| title_short | Preparation,characterization and NO/NO<sub>2</sub> catalytic reduction performance of MnO<sub>2</sub>-Fe<sub>2</sub>O<sub>3</sub>-CeO<sub>2</sub>/Al<sub>2</sub>O<sub>3</sub> nanocatalysts with different manganese contents |
| title_sort | preparation characterization and no no sub 2 sub catalytic reduction performance of mno sub 2 sub fe sub 2 sub o sub 3 sub ceo sub 2 sub al sub 2 sub o sub 3 sub nanocatalysts with different manganese contents |
| topic | manganese oxide nitrogen oxide iron oxide nanocatalyst ceo<sub>2</sub> al<sub>2</sub>o<sub>3</sub> |
| url | http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2020.000087 |
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