Preparation and Catalytic Properties of Barium Cerate and Yttrium-Doped Barium Cerate Supported Ruthenium for Ammonia Synthesis

被引：14
|
作者：
Yang Xiaolong [1 ,2 ]
Xia Chungu [1 ]
Xiong Xumao [1 ]
Mu Xinyuan [1 ]
Hu Bin [1 ]
机构：
[1] Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Oxo Synth & Select Oxidat, Lanzhou 730000, Gansu, Peoples R China
[2] Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
来源：
CHINESE JOURNAL OF CATALYSIS | 2010年 / 31卷 / 04期
基金：
中国国家自然科学基金;
关键词：
ammonia synthesis; ruthenium; barium cerate; yttrium; perovskite-type oxide; electronic interaction; BACEO3;
D O I：
10.1016/S1872-2067(09)60055-3
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
Barium cerate (BaCeO3) and yttrium-doped barium male (BaCe0.9Y0.1O3-delta) were synthesized by the citric acid method and used as supports for Ru/BaCeO3 and Ru/BaCe0.9Y0.1O3-delta catalysts prepared by incipient wetness impregnation using Ru-3(CO)(12) as precursor. The supports and catalysts were characterized by X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. Their catalytic properties for ammonia synthesis were evaluated in a fixed-bed reactor. The stability of BaCeO3 was superior to that of BaCe0.9Y0.1O3-delta, and the catalytic activity of Ru/BaCe0.9Y0.1O3-delta was higher than that of Ru/BaCeO3. The rate of ammonia synthesis over Ru/BaCe0.9Y0.1O3-delta was 432.5 ml/(g.h) at 3.0 MPa, 425 degrees C, and 15 000 h(-1), which was 1.6 times higher than that of Ru/BaCeO3. The electronic interaction between Ce4+ and Ru nanoparticles was the key factor for the difference in catalytic activity and stability.
引用
收藏
页码：377 / 379
页数：3
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