{"title":"表面镀层 CeO2 对具有高选择性催化还原活性的 Cu-ZSM-5 抗二氧化硫能力的影响","authors":"De Fang, Fenghe Sheng, Sensheng Hou, Qinglei Li, Feng He, Junlin Xie","doi":"10.1007/s11144-024-02667-1","DOIUrl":null,"url":null,"abstract":"<div><p>Cu-ZSM-5 (Cu-Zeolite Socony Mobil-five) catalysts with different Cu loadings were prepared by ion exchange method. Different Ce loadings were coated on the surface of 0.1Cu-ZSM-5 to form CeO<sub>2</sub>-Cu-ZSM-5 catalysts. Cu could improve the NH<sub>3</sub>-SCR activity and broaden SCR temperature window. 0.1Cu-ZSM-5 showed the best catalytic performance (above 90%) in 200–400 ℃. 30% CeO<sub>2</sub>-Cu-ZSM-5 catalyst was able to increase the NO conversion in the low-temperature region and keep the activity unchanged in the high-temperature region. CeO<sub>2</sub> that was coated on the catalysts preferentially reacted with SO<sub>2</sub>, enhancing the excellent anti-sulfur poisoning performance. TPD, TPR, and XPS results showed that the synergistic effect of Ce and Cu increased the acidic sites and improved the redox capacity of catalysts. According to in situ DRIFTS spectra, Cu-ZSM-5 catalyst followed the Langmuir–Hinshelwood mechanism, and 30% CeO<sub>2</sub>–0.1Cu-ZSM-5 catalyst followed not only the Langmuir–Hinshelwood mechanism but also the Eley–Rideal mechanism.</p></div>","PeriodicalId":750,"journal":{"name":"Reaction Kinetics, Mechanisms and Catalysis","volume":"137 4","pages":"2215 - 2230"},"PeriodicalIF":1.7000,"publicationDate":"2024-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Effect of surface coating CeO2 on the SO2 resistance of Cu-ZSM-5 with highly selective catalytic reduction activity\",\"authors\":\"De Fang, Fenghe Sheng, Sensheng Hou, Qinglei Li, Feng He, Junlin Xie\",\"doi\":\"10.1007/s11144-024-02667-1\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Cu-ZSM-5 (Cu-Zeolite Socony Mobil-five) catalysts with different Cu loadings were prepared by ion exchange method. Different Ce loadings were coated on the surface of 0.1Cu-ZSM-5 to form CeO<sub>2</sub>-Cu-ZSM-5 catalysts. Cu could improve the NH<sub>3</sub>-SCR activity and broaden SCR temperature window. 0.1Cu-ZSM-5 showed the best catalytic performance (above 90%) in 200–400 ℃. 30% CeO<sub>2</sub>-Cu-ZSM-5 catalyst was able to increase the NO conversion in the low-temperature region and keep the activity unchanged in the high-temperature region. CeO<sub>2</sub> that was coated on the catalysts preferentially reacted with SO<sub>2</sub>, enhancing the excellent anti-sulfur poisoning performance. TPD, TPR, and XPS results showed that the synergistic effect of Ce and Cu increased the acidic sites and improved the redox capacity of catalysts. According to in situ DRIFTS spectra, Cu-ZSM-5 catalyst followed the Langmuir–Hinshelwood mechanism, and 30% CeO<sub>2</sub>–0.1Cu-ZSM-5 catalyst followed not only the Langmuir–Hinshelwood mechanism but also the Eley–Rideal mechanism.</p></div>\",\"PeriodicalId\":750,\"journal\":{\"name\":\"Reaction Kinetics, Mechanisms and Catalysis\",\"volume\":\"137 4\",\"pages\":\"2215 - 2230\"},\"PeriodicalIF\":1.7000,\"publicationDate\":\"2024-05-27\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Reaction Kinetics, Mechanisms and Catalysis\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s11144-024-02667-1\",\"RegionNum\":4,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Reaction Kinetics, Mechanisms and Catalysis","FirstCategoryId":"92","ListUrlMain":"https://link.springer.com/article/10.1007/s11144-024-02667-1","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
Effect of surface coating CeO2 on the SO2 resistance of Cu-ZSM-5 with highly selective catalytic reduction activity
Cu-ZSM-5 (Cu-Zeolite Socony Mobil-five) catalysts with different Cu loadings were prepared by ion exchange method. Different Ce loadings were coated on the surface of 0.1Cu-ZSM-5 to form CeO2-Cu-ZSM-5 catalysts. Cu could improve the NH3-SCR activity and broaden SCR temperature window. 0.1Cu-ZSM-5 showed the best catalytic performance (above 90%) in 200–400 ℃. 30% CeO2-Cu-ZSM-5 catalyst was able to increase the NO conversion in the low-temperature region and keep the activity unchanged in the high-temperature region. CeO2 that was coated on the catalysts preferentially reacted with SO2, enhancing the excellent anti-sulfur poisoning performance. TPD, TPR, and XPS results showed that the synergistic effect of Ce and Cu increased the acidic sites and improved the redox capacity of catalysts. According to in situ DRIFTS spectra, Cu-ZSM-5 catalyst followed the Langmuir–Hinshelwood mechanism, and 30% CeO2–0.1Cu-ZSM-5 catalyst followed not only the Langmuir–Hinshelwood mechanism but also the Eley–Rideal mechanism.
期刊介绍：
Reaction Kinetics, Mechanisms and Catalysis is a medium for original contributions in the following fields:
-kinetics of homogeneous reactions in gas, liquid and solid phase;
-Homogeneous catalysis;
-Heterogeneous catalysis;
-Adsorption in heterogeneous catalysis;
-Transport processes related to reaction kinetics and catalysis;
-Preparation and study of catalysts;
-Reactors and apparatus.
Reaction Kinetics, Mechanisms and Catalysis was formerly published under the title Reaction Kinetics and Catalysis Letters.
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