{"title":"基于简单或混合气凝胶氧化物上支撑的锰的新型 SCR 催化剂：添加硫酸盐的影响","authors":"Jihene Arfaoui, Abdelhamid Ghorbel, Carolina Petitto, Gérard Delahay","doi":"10.1007/s10562-024-04859-9","DOIUrl":null,"url":null,"abstract":"<div><p>New SCR catalysts based on Mn supported on simple or mixed aerogel oxides (Mn/ZrO<sub>2</sub>, Mn/CeO<sub>2</sub>-ZrO<sub>2</sub> and Mn/CeO<sub>2</sub>-ZrO<sub>2</sub>-SO<sub>4</sub><sup>2−</sup>) were prepared for selective catalytic reduction of nitrogen oxide by ammonia (NO-SCR by NH<sub>3</sub>). One step sol gel method followed by supercritical drying process were used for elaborating the catalytic supports, however, Mn species were incorporated into aerogels via impregnation method. Structural, textural, acidic and redox properties of samples were studied using XRD; BET and porosity measurements; NH<sub>3</sub>-TPD and H<sub>2</sub>-TPR techniques. The results revealed that Mn/ZrO<sub>2</sub> and Mn/CeO<sub>2</sub>-ZrO<sub>2</sub> solids develop mesoporous texture, good crystallinity of zirconia tetragonal phase and nano-sized particles but exhibit a poor NO-SCR activity. The addition of SO<sub>4</sub><sup>2−</sup> induces a disorder in ZrO<sub>2</sub> structure but it generates very active strong acid sites for the high temperature NO reduction. 100% NO conversion into N<sub>2</sub> was achieved above 400 °C over the new Mn/CeO<sub>2</sub>-ZrO<sub>2</sub>-SO<sub>4</sub><sup>2−</sup> catalytic system.</p><h3>Graphical Abstract</h3>\n<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"155 1","pages":""},"PeriodicalIF":2.3000,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"New SCR Catalysts Based on Mn Supported on Simple or Mixed Aerogel Oxides: Effect of Sulfates Addition\",\"authors\":\"Jihene Arfaoui, Abdelhamid Ghorbel, Carolina Petitto, Gérard Delahay\",\"doi\":\"10.1007/s10562-024-04859-9\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>New SCR catalysts based on Mn supported on simple or mixed aerogel oxides (Mn/ZrO<sub>2</sub>, Mn/CeO<sub>2</sub>-ZrO<sub>2</sub> and Mn/CeO<sub>2</sub>-ZrO<sub>2</sub>-SO<sub>4</sub><sup>2−</sup>) were prepared for selective catalytic reduction of nitrogen oxide by ammonia (NO-SCR by NH<sub>3</sub>). One step sol gel method followed by supercritical drying process were used for elaborating the catalytic supports, however, Mn species were incorporated into aerogels via impregnation method. Structural, textural, acidic and redox properties of samples were studied using XRD; BET and porosity measurements; NH<sub>3</sub>-TPD and H<sub>2</sub>-TPR techniques. The results revealed that Mn/ZrO<sub>2</sub> and Mn/CeO<sub>2</sub>-ZrO<sub>2</sub> solids develop mesoporous texture, good crystallinity of zirconia tetragonal phase and nano-sized particles but exhibit a poor NO-SCR activity. The addition of SO<sub>4</sub><sup>2−</sup> induces a disorder in ZrO<sub>2</sub> structure but it generates very active strong acid sites for the high temperature NO reduction. 100% NO conversion into N<sub>2</sub> was achieved above 400 °C over the new Mn/CeO<sub>2</sub>-ZrO<sub>2</sub>-SO<sub>4</sub><sup>2−</sup> catalytic system.</p><h3>Graphical Abstract</h3>\\n<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>\",\"PeriodicalId\":508,\"journal\":{\"name\":\"Catalysis Letters\",\"volume\":\"155 1\",\"pages\":\"\"},\"PeriodicalIF\":2.3000,\"publicationDate\":\"2024-11-08\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Catalysis Letters\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s10562-024-04859-9\",\"RegionNum\":4,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Catalysis Letters","FirstCategoryId":"92","ListUrlMain":"https://link.springer.com/article/10.1007/s10562-024-04859-9","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
New SCR Catalysts Based on Mn Supported on Simple or Mixed Aerogel Oxides: Effect of Sulfates Addition
New SCR catalysts based on Mn supported on simple or mixed aerogel oxides (Mn/ZrO2, Mn/CeO2-ZrO2 and Mn/CeO2-ZrO2-SO42−) were prepared for selective catalytic reduction of nitrogen oxide by ammonia (NO-SCR by NH3). One step sol gel method followed by supercritical drying process were used for elaborating the catalytic supports, however, Mn species were incorporated into aerogels via impregnation method. Structural, textural, acidic and redox properties of samples were studied using XRD; BET and porosity measurements; NH3-TPD and H2-TPR techniques. The results revealed that Mn/ZrO2 and Mn/CeO2-ZrO2 solids develop mesoporous texture, good crystallinity of zirconia tetragonal phase and nano-sized particles but exhibit a poor NO-SCR activity. The addition of SO42− induces a disorder in ZrO2 structure but it generates very active strong acid sites for the high temperature NO reduction. 100% NO conversion into N2 was achieved above 400 °C over the new Mn/CeO2-ZrO2-SO42− catalytic system.
期刊介绍：
Catalysis Letters aim is the rapid publication of outstanding and high-impact original research articles in catalysis. The scope of the journal covers a broad range of topics in all fields of both applied and theoretical catalysis, including heterogeneous, homogeneous and biocatalysis.
The high-quality original research articles published in Catalysis Letters are subject to rigorous peer review. Accepted papers are published online first and subsequently in print issues. All contributions must include a graphical abstract. Manuscripts should be written in English and the responsibility lies with the authors to ensure that they are grammatically and linguistically correct. Authors for whom English is not the working language are encouraged to consider using a professional language-editing service before submitting their manuscripts.
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