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Removal of NO_x and Diesel Soot Particulates Catalyzed byPerovskite-type Oxide La_(0.9)K_(0.1)CoO_3

Journal of Wuhan University of Technology(Materials Science) 2006年第1期21卷 57-59页

作者：王伟 zhan reggie Automobile Engineering School Wuhan University of TechnologyWuhan 430070China Automobile Engineering School Wuhan University of TechnologyWuhan 430070ChinaSouth West Research InstituteDrawer 28510U.S.A

The catalytic performance of perovskite composite oxide catalyst La0.9 K0.1 CoO3 coated on catalyst supports by traditional solid state reaction method and sol-gel method were investigated by a series of experiments. The restdt shows that the catalytic performance of the La0.9 K0.1 CoO3 perovskite composite oxide catalyst synthesized by sol-gel method is superior to that synthesized by solid state reaction method, having lower ignition temperature of the diesel soot particulates, lower start temperature of NOx treatment, and lower concentration of byproduct CO.

关键词： perovskite composite oxides La0.9 K0.1 CoO3 sol-gel method diesel waste gas cleaning

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Pd-M-TiO_(2)(M=Mn,Cu,Ce and Fe)as passive NO_(x) adsorber(PNA)at low temperature

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Journal of Central South University 2022年第7期29卷 2253-2265页

作者： WANG Yi-nan ZHAO Xu-teng ZHENG Zu-wei JIANG Han CHEN Ting zhanG Yi-ran CAO Hong-lin LIN He zhan reggie Key Laboratory for Power Machinery and Engineering of Ministry of Education Shanghai Jiao Tong UniversityShanghai 200240China Beijing Vehicle Emissions Management Center Beijing 100081China

A series of transition metal Mn,Cu,Ce and Fe were loaded on TiO_(2) by sol-gel method with noble metal Pd as promotor for the application of passive NO_(x) *** on adsorption and desorption of NO_(x) were conducted and characterization methods such as X-ray diffraction(XRD),X-ray photoelectron spectroscopy(XPS),transmission electron microscopy(TEM)and in situ Fourier transform infrared spectroscopy(in situ DRIFTS)were *** experimental results show that Mn-contained catalysts,Mn-Ti and Pd-Mn-Ti,performed excellent NO_(x) adsorbing ability and appropriate desorption temperature *** the other hand,Ce-and Cu-contained samples were not suitable for the purpose of *** addition to the low adsorption capacity,these two series of catalysts released massive amount of NO below 150℃.Characterization results indicated that Pd was highly dispersed on all *** loading of Pd lowered not only the valence states of transition metals but surface oxygen percentage as *** in situ DRIFTS tests,the Pd had little influence on the types of adsorbed substances for Mn,Ce and Cu ***,the storage forms of NO_(x) were obviously different on Pd-Fe-Ti and Fe-Ti.

关键词： passive NO_(x)adsorber low temperature absorption manganese Pd-Fe interaction

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