Effect of barium and potassium promoter on Co/CeO2 catalysts in ammonia synthesis

被引：35

作者：

Lin, Bingyu ^{[1
]}

Liu, Yi ^{[1
]}

Heng, Lan ^{[1
]}

Ni, Jun ^{[1
]}

Lin, Jianxin ^{[1
]}

Jiang, Lilong ^{[1
]}

机构：

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

来源：

JOURNAL OF RARE EARTHS | 2018年 / 36卷 / 07期

基金：

中国国家自然科学基金;

关键词：

Promoter; Co/CeO2; catalyst; Ammonia synthesis; Barium; Potassium; Rare earths; SUPPORTED COBALT CATALYST; STABILITY; OXIDATION; ALUMINA; RU/AC; METAL;

D O I：

10.1016/j.jre.2018.01.017

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The Co/CeO2 catalysts promoted with Ba or K were prepared to study the effect of promoter on the catalytic performance of ammonia synthesis. The results show that the presence of Ba or K promoter changes the properties of CeO2-supported Co catalysts including the surface area, the crystallite size and the morphology of CeO2, the reduction degree of cobalt species and the adsorption performance of hydrogen and nitrogen. As a consequence, the samples promoted with an appropriate amount of Ba show higher ammonia synthesis rates, while the catalysts with high Ba loading or K promoter all exhibit low catalytic activities. (C) 2018 Chinese Society of Rare Earths. Published by Elsevier B.V. All rights reserved.

引用

页码：703 / 707

页数：5

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