Effect of La2O3 on Ru/CeO2-La2O3 Catalyst for Ammonia Synthesis

被引：69

作者：

Luo, Xiaojun ^{[1
]}

Wang, Rong ^{[1
]}

Ni, Jun ^{[1
]}

Lin, Jianxin ^{[1
]}

Lin, Bingyu ^{[1
]}

Xu, Xianming ^{[2
]}

Wei, Kemei ^{[1
]}

机构：

[1] Fuzhou Univ, Natl Res Ctr Chem Fertilizer Catalysts, Fuzhou 350002, Fujian, Peoples R China

[2] Petr Chem Res Ctr Daqing, China Petr Chem Res Inst Daqing, Daqing 163714, Heilongjiang, Peoples R China

来源：

CATALYSIS LETTERS | 2009年 / 133卷 / 3-4期

基金：

中国国家自然科学基金;

关键词：

Co-precipitation; Ruthenium; CeO2-La2O3; Ammonia synthesis; La doping; SUPPORTED RUTHENIUM CATALYSTS; WATER-GAS SHIFT; HYDROGEN CHEMISORPTION; PREFERENTIAL OXIDATION; RU; ALUMINA; CEO2; REVERSIBILITY; PROMOTERS; PEROXIDE;

D O I：

10.1007/s10562-009-0177-7

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A series of CeO2-La2O3 supported ruthenium catalysts were prepared by co-precipitation method and the as-obtained samples were characterized by N-2 physisorption, X-ray diffraction, CO chemisorption, H-2-TPR, H-2-TPD and XPS. The activity test shows that ammonia concentration of the catalyst with 10% La is 13.9% at 10 MPa, 10,000 h(-1), 450 A degrees C, which is 17% higher than that of Ru/CeO2. La doping can improve the activity of Ru-ceria catalyst for ammonia synthesis by facilitating the reduction of oxygen which subsists in the cerium oxide surface. In addition, it can be realized that the test of catalyst stability proves the stability performance of Ru/CeO2-La2O3 catalyst within the reaction time of 55 h.

引用

页码：382 / 387

页数：6

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