Sm-promoted alumina supported Ru catalysts for ammonia synthesis: Effect of the preparation method and Sm promoter

被引：32
作者：
Lin, Bingyu [1 ]
Wang, Rong [1 ]
Lin, Jianxin [1 ]
Ni, Jun [1 ]
Wei, Kemei [1 ]
机构：
[1] Fuzhou Univ, Natl Engn Res Ctr Chem Fertilizer Catalyst, Fuzhou 350002, Fujian, Peoples R China
来源：
CATALYSIS COMMUNICATIONS | 2011年 / 12卷 / 06期
基金：
中国国家自然科学基金;
关键词：
Chlorine-free; Alumina supported Ru catalysts; Sm; Hydrogen temperature-programmed desorption; Ammonia synthesis; NANOTUBES (CNTS)-CORDIERITE MONOLITHS; RUTHENIUM CATALYST; CHEMISORPTIVE PROPERTIES; REDUCTION TEMPERATURE; CHLORINE; CARBON; AL; HYDROGENATION; DISPERSION; PRECURSOR;
D O I：
10.1016/j.catcom.2010.12.009
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：
Sm promoted Ru/Al2O3 catalysts were prepared by different preparation methods. The samples were characterized by XRF, TEM, CO chemisorption and H-2-TPD. It is found that chlorine-free Ru/Al2O3 catalyst could be prepared by precipitation method. The presence of residual chlorine restricted the adsorbed hydrogen, which corresponded to the desorption peak in the temperature range of 150 to 325 degrees C. The addition of Sm significantly decreased the amount of adsorbed hydrogen. Sm promoted the precipitated Ru/Al2O3 catalysts showed higher ammonia synthesis activities than those samples obtained by hydrogen treatment or hydrazine reduction. The activity of Sm promoted Ru/Al2O3 catalysts increased up to a certain value and then decreased with the increase in Sm loading. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：553 / 558
页数：6
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