A CeFeOx catalyst for catalytic oxidation of NO to NO2

Catalytic oxidation of NO into NO2 is a promising method for NOx emission control. The aim of this study was to de-velop an economic and environmental-friendly catalyst for NO catalytic oxidation. Herein a CeFeOx complex oxide catalyst for catalytic oxidation of NO was prepared by coprecipitation me...

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Published inJournal of rare earths Vol. 34; no. 9; pp. 876 - 881
Main Author 王文欢 李伟 郭瑞堂 陈其林 王青山 潘卫国 胡国新
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.09.2016
Subjects
catalytic oxidation
CeFeOx catalyst
characterization
NO2
rare earths
X射线光电子能谱
催化氧化
固定床反应器
复合氧化物催化剂
标题
程序升温脱附
程序升温还原
NO
CeFeOx catalyst
characterization
catalytic oxidation
rare earths
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Summary:Catalytic oxidation of NO into NO2 is a promising method for NOx emission control. The aim of this study was to de-velop an economic and environmental-friendly catalyst for NO catalytic oxidation. Herein a CeFeOx complex oxide catalyst for catalytic oxidation of NO was prepared by coprecipitation method. After that the catalytic performance of this catalyst was meas-ured on a fixed-bed reactor. It was found that the intrinsic activity of CeFeOx was higher than that of CeOx and FeOx. The charac-terization techniques of Brumauer-Emmett-Teller （BET）, X-ray diffraction （XRD）, temperature programmed reduction with H2 （H2-TPR）, temperature programmed desorption with NO＋O2 （NO＋O2-TPD） and X-ray photoelectron spectroscopy （XPS） were performed to investigate the surface area, crystal structure, redox property and NOx adsorption behavior of the catalyst samples. From the characterization results, it was concluded that the low crystallinity of CeFeOx promoted the dispersion of active species, as a result, enhancing the redox ability and NO adsorption capacity of CeFeOx catalyst, which is favorable to NO catalytic oxida-tion. Furthermore, the presence of much chemisorbed oxygen on CeFeOx catalyst also made a great contribution to its good cata-lytic performance.
Bibliography:11-2788/TF
Catalytic oxidation of NO into NO2 is a promising method for NOx emission control. The aim of this study was to de-velop an economic and environmental-friendly catalyst for NO catalytic oxidation. Herein a CeFeOx complex oxide catalyst for catalytic oxidation of NO was prepared by coprecipitation method. After that the catalytic performance of this catalyst was meas-ured on a fixed-bed reactor. It was found that the intrinsic activity of CeFeOx was higher than that of CeOx and FeOx. The charac-terization techniques of Brumauer-Emmett-Teller （BET）, X-ray diffraction （XRD）, temperature programmed reduction with H2 （H2-TPR）, temperature programmed desorption with NO＋O2 （NO＋O2-TPD） and X-ray photoelectron spectroscopy （XPS） were performed to investigate the surface area, crystal structure, redox property and NOx adsorption behavior of the catalyst samples. From the characterization results, it was concluded that the low crystallinity of CeFeOx promoted the dispersion of active species, as a result, enhancing the redox ability and NO adsorption capacity of CeFeOx catalyst, which is favorable to NO catalytic oxida-tion. Furthermore, the presence of much chemisorbed oxygen on CeFeOx catalyst also made a great contribution to its good cata-lytic performance.
WANG Wenhuan , LI Wei , GUO Ruitang , CHEN Qilin WANG Qingshan PAN Weiguo, HU Guoxin （1. School of Mechanical and Power Engineering, Shanghai Jiaotong University, Shanghai 200240, China;2. School of Energy Source and Mechanical Engi- neering, Shanghai University of Electric Power, Shanghai 200090, China; 3. Shanghai Engineering Research Center of Power Generation Environment Protec- tion, Shanghai 200090, China）
NO; catalytic oxidation; CeFeOx catalyst; characterization; rare earths
ISSN:1002-0721
2509-4963
DOI:10.1016/S1002-0721(16)60109-6