{"title":"促进剂（Co、Cr、Fe、Zr）对 MnO2/CeO2 催化剂在低温下利用 NH3-SCR 还原 NO 性能的影响","authors":"Shyam Sunder Rao, Sweta Sharma","doi":"10.1007/s10563-023-09416-9","DOIUrl":null,"url":null,"abstract":"<div><p>This study examined the effect of various promoters (Co, Cr, Fe, Zr) in reducing NO using the NH<sub>3</sub>-SCR reaction on the MnO<sub>2</sub>/CeO<sub>2</sub>-Nanorod catalysts. The physicochemical properties of these catalysts were characterized using Brunauer–Emmett–Teller, X-ray diffraction, X-ray photoelectron spectroscopy, transmission electron microscope, scanning electron microscope-energy dispersive X-ray spectroscopy, and Raman spectroscopy. Characterization analysis revealed uniform dispersion of active metals on CeO<sub>2</sub>-Nanorod supports, desired active metal-support synergism, small crystallite sizes, high specific surface areas, and an appreciable amount of surface lattice oxygen in Co–MnO<sub>2</sub>/CeO<sub>2</sub>-Nanorod catalysts. Co–MnO<sub>2</sub>/CeO<sub>2</sub>-Nanorod catalyst showed the best NH<sub>3</sub>-SCR activity at low temperatures. The NO conversion and N<sub>2</sub> selectivity are 87 and 85%, respectively, at 300 °C with excellent stability. The Co–MnO<sub>2</sub>/CeO<sub>2</sub>-Nanorod catalyst also showed excellent tolerance against the H<sub>2</sub>O and the SO<sub>2</sub>. The catalyst’s performance can be attributed to its high surface area, oxygen storage capacity, high Ce<sup>3+</sup> content, and evenly distributed promoters.</p></div>","PeriodicalId":509,"journal":{"name":"Catalysis Surveys from Asia","volume":"28 1","pages":"88 - 100"},"PeriodicalIF":2.1000,"publicationDate":"2023-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Effect of Promoters (Co, Cr, Fe, Zr) on the Performance of MnO2/CeO2 Catalysts for NO Reduction at Low Temperatures Using NH3-SCR\",\"authors\":\"Shyam Sunder Rao, Sweta Sharma\",\"doi\":\"10.1007/s10563-023-09416-9\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>This study examined the effect of various promoters (Co, Cr, Fe, Zr) in reducing NO using the NH<sub>3</sub>-SCR reaction on the MnO<sub>2</sub>/CeO<sub>2</sub>-Nanorod catalysts. The physicochemical properties of these catalysts were characterized using Brunauer–Emmett–Teller, X-ray diffraction, X-ray photoelectron spectroscopy, transmission electron microscope, scanning electron microscope-energy dispersive X-ray spectroscopy, and Raman spectroscopy. Characterization analysis revealed uniform dispersion of active metals on CeO<sub>2</sub>-Nanorod supports, desired active metal-support synergism, small crystallite sizes, high specific surface areas, and an appreciable amount of surface lattice oxygen in Co–MnO<sub>2</sub>/CeO<sub>2</sub>-Nanorod catalysts. Co–MnO<sub>2</sub>/CeO<sub>2</sub>-Nanorod catalyst showed the best NH<sub>3</sub>-SCR activity at low temperatures. The NO conversion and N<sub>2</sub> selectivity are 87 and 85%, respectively, at 300 °C with excellent stability. The Co–MnO<sub>2</sub>/CeO<sub>2</sub>-Nanorod catalyst also showed excellent tolerance against the H<sub>2</sub>O and the SO<sub>2</sub>. The catalyst’s performance can be attributed to its high surface area, oxygen storage capacity, high Ce<sup>3+</sup> content, and evenly distributed promoters.</p></div>\",\"PeriodicalId\":509,\"journal\":{\"name\":\"Catalysis Surveys from Asia\",\"volume\":\"28 1\",\"pages\":\"88 - 100\"},\"PeriodicalIF\":2.1000,\"publicationDate\":\"2023-12-07\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Catalysis Surveys from Asia\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s10563-023-09416-9\",\"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 Surveys from Asia","FirstCategoryId":"92","ListUrlMain":"https://link.springer.com/article/10.1007/s10563-023-09416-9","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
Effect of Promoters (Co, Cr, Fe, Zr) on the Performance of MnO2/CeO2 Catalysts for NO Reduction at Low Temperatures Using NH3-SCR
This study examined the effect of various promoters (Co, Cr, Fe, Zr) in reducing NO using the NH3-SCR reaction on the MnO2/CeO2-Nanorod catalysts. The physicochemical properties of these catalysts were characterized using Brunauer–Emmett–Teller, X-ray diffraction, X-ray photoelectron spectroscopy, transmission electron microscope, scanning electron microscope-energy dispersive X-ray spectroscopy, and Raman spectroscopy. Characterization analysis revealed uniform dispersion of active metals on CeO2-Nanorod supports, desired active metal-support synergism, small crystallite sizes, high specific surface areas, and an appreciable amount of surface lattice oxygen in Co–MnO2/CeO2-Nanorod catalysts. Co–MnO2/CeO2-Nanorod catalyst showed the best NH3-SCR activity at low temperatures. The NO conversion and N2 selectivity are 87 and 85%, respectively, at 300 °C with excellent stability. The Co–MnO2/CeO2-Nanorod catalyst also showed excellent tolerance against the H2O and the SO2. The catalyst’s performance can be attributed to its high surface area, oxygen storage capacity, high Ce3+ content, and evenly distributed promoters.
期刊介绍：
Early dissemination of important findings from Asia which may lead to new concepts in catalyst design is the main aim of this journal. Rapid, invited, short reviews and perspectives from academia and industry will constitute the major part of Catalysis Surveys from Asia . Surveys of recent progress and activities in catalytic science and technology and related areas in Asia will be covered regularly as well. We would appreciate critical comments from colleagues throughout the world about articles in Catalysis Surveys from Asia . If requested and thought appropriate, the comments will be included in the journal. We will be very happy if this journal stimulates global communication between scientists and engineers in the world of catalysis.
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