Effect of barium and potassium promoter on Co/CeO2 catalysts in ammonia synthesis
来源期刊：Journal of Rare Earths2018年第7期
论文作者：Bingyu Lin Yi Liu Lan Heng Jun Ni Jianxin Lin Lilong Jiang
文章页码：703 - 707
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.
Bingyu Lin，Yi Liu，Lan Heng，Jun Ni，Jianxin Lin，Lilong Jiang
National Engineering Research Center of Chemical Fertilizer Catalyst,College of Chemical Engineering,Fuzhou University
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.
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