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Chemcial Industry and Engineering 2017, Vol. 34 Issue (2) :39-44    DOI: 10.13353/j.issn.1004.9533.20151095
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NOx Storage-Reduction Performance of Perovskite-Type La0.7Sr0.3Co1-xRuxO3 Catalysts
Chen Gongdong, Chen Cheng, Li Xingang
Collaborative Innovation Center of Chemical Science and Engineering(Tianjin), School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China

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Abstract 

A series of Ru-doped perovskite-type La0.7Sr0.3Co1-xRuxO3 catalysts was synthesized using sol-gel method. The samples were characterized with XRD and H2-TPR. The results showed that the structures of perovskite became more integrated than that of the undoped perovskite, and the segregation of the unitary oxides of the component metal ions was suppressed with Ru doping. The catalysts performed a storage trap of NOx with a considerable trap width, as well kept a good storage capacity of NOx during storage-reduction test all under 325℃. The strontium carbonate was the major adsorption site of NOx, and its proportion decreased as Ru doping, with the contribution to NOx adsorption declining indicated by the parameter of carbon-nitrogen ratio.

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Chen Gongdong
Chen Cheng
Li Xingang
Keywordsperovskite;   doping;   NOx storage;   carbonate;   carbon-nitrogen ratio     
Received 2015-05-18;
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Chen Gongdong, Chen Cheng, Li Xingang.NOx Storage-Reduction Performance of Perovskite-Type La0.7Sr0.3Co1-xRuxO3 Catalysts[J]  Chemcial Industry and Engineering, 2017,V34(2): 39-44
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