XIE 　Ying, JIN Zheng-Lai, Chen-　Ying, Ma-Yu-Gang, Chen-Xiao-Ping, Chen-Min-Dong. Study on the properties of |Pt/ Ba/TiCeO catalyst for NOx storage and resistance to SO2[J]. Journal of Fuel Chemistry and Technology, 2011, 39(04): 300-306.
Citation: XIE 　Ying, JIN Zheng-Lai, Chen-　Ying, Ma-Yu-Gang, Chen-Xiao-Ping, Chen-Min-Dong. Study on the properties of |Pt/ Ba/TiCeO catalyst for NOx storage and resistance to SO2[J]. Journal of Fuel Chemistry and Technology, 2011, 39(04): 300-306.
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Study on the properties of |Pt/ Ba/TiCeO catalyst for NOx storage and resistance to SO2

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  • A novel NOx-storage-reduction (NSR) catalyst of Pt/Ba/TiCeO was prepared by coprecipitation-impregnation method and the effects of the reaction atmosphere on its properties for NOx storage was investigated. The catalysts were characterized by means of N2 adsorption, X-ray diffraction (XRD) and temperature-programmed desorption(TPD). The results indicate that the specific surface areas of TiCeO and BaO/TiCeO were as high as 230m2/g and 90m2/g respectively. For the component of Ba, not only did it act as structural promoter for enhancing the structure stability of the catalysts Pt/Ba/TiCeO, but also it increased NOx storage capacity due to its basicity. Pt catalyzed oxidization of NO to NO2, and it is easier for NO2 to react with BaO/TiCeO to form nitrate than NO. TiCeO in Pt/Ba/TiCeO catalyst exhibited as both support and storage component in the NOx storage-reduction process. There were some active sites composed of Ba and TiCeO in the catalyst of Pt/Ba/TiCeO. The presence of SO2 has less effect on NOx storage capacity of Pt/Ba/TiCeO catalyst because the formed sulfate on the surface of the catalyst was unstable and was easily removed by reduction.
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