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化学工业与工程 2017, Vol. 34 Issue (2) :39-44    DOI: 10.13353/j.issn.1004.9533.20151095
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钙钛矿型La0.7Sr0.3Co1-xRuxO3催化剂的NOx储存还原性能
陈功东, 陈成, 李新刚
天津大学化工学院, 天津化学化工协同创新中心, 天津 300072
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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摘要 

通过溶胶-凝胶法制备了贵金属Ru掺杂的系列钙钛矿型La0.7Sr0.3Co1-xRuxO3催化剂,进行了XRD和H2-TPR的表征,并进行了NOx储存和NOx储存还原的测试。通过表征发现,催化剂在掺杂了Ru之后,钙钛矿型结构保持得更加完整,单一氧化物的偏析受到了抑制。在325℃下,催化剂具有比较宽的NOx吸附阱,在储存还原测试中NOx吸附能力比较强。碳酸锶物种是NOx的主要吸附位,在Ru的掺杂下,其含量下降,以碳/氮比值为标志的对NOx吸附的贡献量减小。

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陈功东
陈成
李新刚
关键词钙钛矿;   掺杂;   NOx储存;   碳酸盐;   碳/氮比     
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.

Keywordsperovskite;   doping;   NOx storage;   carbonate;   carbon-nitrogen ratio     
Received 2015-05-18;
Fund:

国家自然科学基金(U1232118);教育部新世纪优秀人才支持计划(NCET-10-0615)。

Corresponding Authors: 李新刚,E-mail:xingang_li@tju.edu.cn。     Email: xingang_li@tju.edu.cn
About author: 陈功东(1990-),男,硕士研究生,研究方向为氮氧化物储存还原催化消除。
引用本文:   
陈功东, 陈成, 李新刚.钙钛矿型La0.7Sr0.3Co1-xRuxO3催化剂的NOx储存还原性能[J].  化学工业与工程, 2017,34(2): 39-44
Chen Gongdong, Chen Cheng, Li Xingang.NOx Storage-Reduction Performance of Perovskite-Type La0.7Sr0.3Co1-xRuxO3 Catalysts[J].  Chemcial Industry and Engineering, 2017,34(2): 39-44
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