Catalytic combustion of diesel soot over K2NiF4-type oxides La2-xKxCuO4
来源期刊：JOURNAL OF RARE EARTHS2008年第2期
论文作者：LIANG Cunzhen WANG Xuezhong ZHU Ling
Key words：K2NiF4-type complex oxides; soot; catalytic combustion; rare earths;
Abstract: Nanostructure K2NiF4 type oxides La2-xKxCuO4 complex oxides were prepared using the Sol-Gel method, characterized by X-Ray Diffraction (XRD), Fourier Transform Infrared (FT-IR), and Scanning Electron Microscopy (SEM). The catalytic activity for soot combustion was evaluated by the Temperature-Programmed Reaction (TPO) technique. The results demonstrated that the substitution quality of K+ for La3+ at the A-site would increase the catalytic activities of La2-xKxCuO4 for soot combustion greatly; the substitution quality affected the structure and catalytic activity obviously. The La1.8K0.2CuO4 complex oxides with tetrahedral structures had the best catalytic activity for soot combustion, and the ignition temperature of soot combustion was lowered from 490 to 320 °C.
LIANG Cunzhen1，WANG Xuezhong2，ZHU Ling1
(1.Department of Environmental Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China;
2.Chinese Research Academy of Environmental Sciences, Beijing 100012, China)
Abstract:Nanostructure K2NiF4 type oxides La2-xKxCuO4 complex oxides were prepared using the Sol-Gel method, characterized by X-Ray Diffraction (XRD), Fourier Transform Infrared (FT-IR), and Scanning Electron Microscopy (SEM). The catalytic activity for soot combustion was evaluated by the Temperature-Programmed Reaction (TPO) technique. The results demonstrated that the substitution quality of K+ for La3+ at the A-site would increase the catalytic activities of La2-xKxCuO4 for soot combustion greatly; the substitution quality affected the structure and catalytic activity obviously. The La1.8K0.2CuO4 complex oxides with tetrahedral structures had the best catalytic activity for soot combustion, and the ignition temperature of soot combustion was lowered from 490 to 320 °C.
Key words:K2NiF4-type complex oxides; soot; catalytic combustion; rare earths;
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