e掺杂对稀土钙钛矿型LaMnO3催化剂的结构和甲烷催化燃烧性能的影响
Influence of Ce doption LaMnO3 catalyst on the structure and activity on CH4 combustion
以柠檬酸为络合剂采用溶胶-凝胶法制备了La1-xCexMnO3稀土钙钛矿材料，以X射线衍射法（XRD）分析样品的物相，扫描电镜（SEM）和透射电镜（TEM）分析样品的形貌和粒度；以堇青石蜂窝陶瓷为载体，γ-Al2O3为支持剂，利用浸渍法制备了La1-xCexMnO3/γ-Al2O3/堇青石催化剂，研究了在模拟压缩天然气汽车排气条件下，对甲烷的催化燃烧性能。结果表明，随着Ce取代量的增大，钙钛矿的晶体结构由四方晶系向正交晶系转化。当Ce的取代量为0.2时，对CH4的催化活性最好。
In this paper,A series of La1-xCexMnO3(x=0,0.2,0.4,0.6,0.8) perovskite oxides were successfully prepared via a sol-gel method and characterized by X-ray diffraction, transmission electron microscopy and field emission scanning electron microscopy techniques. The catalyst was lined on cordierite monoliths in a γ-Al2O3-supported form and then tested in a temperature programmed combustion microreactor for the activity towards the combustion of methane. The results showed that when x=0.2, the phase structure belonged to tetragonal system, while x>0.2, the phase structure was changed to system. The La0.8Ce0.2MnO3 catalyst was found to provide best performance.
王晓飞、龚彩荣、范国樑
能源动力工业经济化学电热工业、高温制品工业
催化剂稀土钙钛矿催化燃烧甲烷
catalystslanthanon perovskitecatalytic combustionCH4
王晓飞,龚彩荣,范国樑.e掺杂对稀土钙钛矿型LaMnO3催化剂的结构和甲烷催化燃烧性能的影响[EB/OL].(2011-01-27)[2025-08-02].http://www.paper.edu.cn/releasepaper/content/201101-1362.点此复制
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