Preparation of La0.9RE0.1MnO3 Ultra-fine Particles Used for CH4 Oxidation
来源期刊：JOURNAL OF RARE EARTHS2002年第5期
论文作者：刘全生 郑海涛 张通 刘源
Key words：rare earths; perovskite-type oxides; ultra-fine particles; catalytic combustion;
Abstract: A technique for preparing perovskite-type oxides was developed. By this technique, ultra-fine particles of La0.9RE0.1MnO3 (RE: Y, Ce, Pr, Sm, Gd,or Dy) with high surface area and single perovskite structure were prepared, and the series of La0.9RE0.1MnO3 catalysts were studied experimentally. The so prepared ultra-fine particles exhibites high catalytic activity for CH4 total oxidation. The ultra-fine particles of La0.9RE0.1MnO3 (except for La0.9Pr0.1MnO3) prepared by this method are thermally much more stable than LaMnO3. Of the La0.9RE0.1MnO3 series, La0.9Y0.1MnO3 is most thermally stable, and La0.9Y0.1MnO3 or La0.9Gd0.1MnO3 (varies with calcination temperature) exhibits the highest catalytic activity for total oxidation of methane. The specific surface area of La0.9Y0.1MnO3 calcined at 1000 ℃ reaches 14.9 m2*g-1, while the specific surface area of LaMnO3 calcined at the same temperature is only 1.8 m2*g-1.
刘全生1，郑海涛1，张通1，刘源1
(1.Department of Chemical Engineering, Inner Mongolia Polytechnic University, Huhehot 010062, China)
Abstract:A technique for preparing perovskite-type oxides was developed. By this technique, ultra-fine particles of La0.9RE0.1MnO3 (RE: Y, Ce, Pr, Sm, Gd,or Dy) with high surface area and single perovskite structure were prepared, and the series of La0.9RE0.1MnO3 catalysts were studied experimentally. The so prepared ultra-fine particles exhibites high catalytic activity for CH4 total oxidation. The ultra-fine particles of La0.9RE0.1MnO3 (except for La0.9Pr0.1MnO3) prepared by this method are thermally much more stable than LaMnO3. Of the La0.9RE0.1MnO3 series, La0.9Y0.1MnO3 is most thermally stable, and La0.9Y0.1MnO3 or La0.9Gd0.1MnO3 (varies with calcination temperature) exhibits the highest catalytic activity for total oxidation of methane. The specific surface area of La0.9Y0.1MnO3 calcined at 1000 ℃ reaches 14.9 m2*g-1, while the specific surface area of LaMnO3 calcined at the same temperature is only 1.8 m2*g-1.
Key words:rare earths; perovskite-type oxides; ultra-fine particles; catalytic combustion;
【全文内容正在添加中】
