{"title":"La0.8Sr0.2MnO3钙钛矿上NO的催化氧化","authors":"Ying-xian ZHAO, Feng WEI, Ying YU","doi":"10.1016/S1005-9040(08)60130-0","DOIUrl":null,"url":null,"abstract":"<div><p>Catalytic oxidation of NO by O<sub>2</sub> over La<sub>0.8</sub>Sr<sub>0.2</sub>MnO<sub>3</sub> was tested in a tubular reactor. The reaction temperature ranged from 373 to 473 K, space time from 0.090 to 0.720 s, inlet NO concentration from 300 to 2000 μL/L, and O<sub>2</sub> volume fraction from 3% to 9%. The steady-state conversion of NO was increased significantly with increasing reaction temperature and the space time, slightly with increasing the O<sub>2</sub> concentration but decreased with increasing the inlet NO concentration at a lower temperature. Under the conditions of 0.720 s space time, 500 μL/L NO concentration, 5% O<sub>2</sub> volume fraction and 473 K, NO conversion reached 90%. A kinetic model including a network of 12 elementary reactions with the desorption of NO<sub>2</sub> as the rate-limiting step is established and fits the experimental data well. The activation energy of NO<sub>2</sub> desorption from the catalyst surface is determined to be 101 kJ/mol.</p></div>","PeriodicalId":9785,"journal":{"name":"Chemical Research in Chinese Universities","volume":"24 5","pages":"Pages 620-627"},"PeriodicalIF":3.1000,"publicationDate":"2008-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1005-9040(08)60130-0","citationCount":"2","resultStr":"{\"title\":\"Catalytic Oxidation of NO over La0.8Sr0.2MnO3 Perovskite\",\"authors\":\"Ying-xian ZHAO, Feng WEI, Ying YU\",\"doi\":\"10.1016/S1005-9040(08)60130-0\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Catalytic oxidation of NO by O<sub>2</sub> over La<sub>0.8</sub>Sr<sub>0.2</sub>MnO<sub>3</sub> was tested in a tubular reactor. The reaction temperature ranged from 373 to 473 K, space time from 0.090 to 0.720 s, inlet NO concentration from 300 to 2000 μL/L, and O<sub>2</sub> volume fraction from 3% to 9%. The steady-state conversion of NO was increased significantly with increasing reaction temperature and the space time, slightly with increasing the O<sub>2</sub> concentration but decreased with increasing the inlet NO concentration at a lower temperature. Under the conditions of 0.720 s space time, 500 μL/L NO concentration, 5% O<sub>2</sub> volume fraction and 473 K, NO conversion reached 90%. A kinetic model including a network of 12 elementary reactions with the desorption of NO<sub>2</sub> as the rate-limiting step is established and fits the experimental data well. The activation energy of NO<sub>2</sub> desorption from the catalyst surface is determined to be 101 kJ/mol.</p></div>\",\"PeriodicalId\":9785,\"journal\":{\"name\":\"Chemical Research in Chinese Universities\",\"volume\":\"24 5\",\"pages\":\"Pages 620-627\"},\"PeriodicalIF\":3.1000,\"publicationDate\":\"2008-09-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1016/S1005-9040(08)60130-0\",\"citationCount\":\"2\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Chemical Research in Chinese Universities\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S1005904008601300\",\"RegionNum\":4,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"CHEMISTRY, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Chemical Research in Chinese Universities","FirstCategoryId":"92","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1005904008601300","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
Catalytic Oxidation of NO over La0.8Sr0.2MnO3 Perovskite
Catalytic oxidation of NO by O2 over La0.8Sr0.2MnO3 was tested in a tubular reactor. The reaction temperature ranged from 373 to 473 K, space time from 0.090 to 0.720 s, inlet NO concentration from 300 to 2000 μL/L, and O2 volume fraction from 3% to 9%. The steady-state conversion of NO was increased significantly with increasing reaction temperature and the space time, slightly with increasing the O2 concentration but decreased with increasing the inlet NO concentration at a lower temperature. Under the conditions of 0.720 s space time, 500 μL/L NO concentration, 5% O2 volume fraction and 473 K, NO conversion reached 90%. A kinetic model including a network of 12 elementary reactions with the desorption of NO2 as the rate-limiting step is established and fits the experimental data well. The activation energy of NO2 desorption from the catalyst surface is determined to be 101 kJ/mol.
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