催化学报

催化学报 ›› 2011, Vol. 32 ›› Issue (3): 436-439.DOI: 10.1016/S1872-2067(10)60179-9

• 研究论文 • 上一篇    下一篇

Mg 促进的 Ru-Ba/AC 高效氨合成催化剂

倪军 1, 王榕 1, 孔繁华 2, 张天釜 2, 林建新 1, 林炳裕 1, 魏可镁 1   

  1. 1 福州大学化肥催化剂国家工程研究中心, 福建福州350002; 2 中国石油天然气股份有限公司石油化工研究院, 北京 100029
  • 收稿日期:2010-09-21 修回日期:2010-12-10 出版日期:2011-03-04 发布日期:2014-08-01

Highly Efficient Ru-Ba/AC Catalyst Promoted by Magnesium for Ammonia Synthesis

NI Jun1, WANG Rong1,*, KONG Fanhua2, ZHANG Tianfu2, LIN Jianxin1, LIN bingyu1, WEI Kemei1   

  1. 1National Engineering Research Center of Chemical Fertilizer Catalysts, Fuzhou University, Fuzhou 350002, Fujian, China;  2Petrochemical Research Institute of Petrochina Company Limited, Beijing 100029, China
  • Received:2010-09-21 Revised:2010-12-10 Online:2011-03-04 Published:2014-08-01

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1114

被引次数

6

摘要： 通过 X 射线衍射、CO 化学吸附、X 射线光电子能谱和氨合成活性测试等手段, 研究了 Mg 助剂对 Ru/AC 催化剂组分分布和活性的影响. 结果显示, 适量 Mg 的添加有利于 Ba 和金属 Ru 粒子在活性炭表面的均匀分布, 从而提高了催化剂活性.

关键词: 钡, 活性炭, 镁, 钌, 氨合成

Abstract: The effect of alkaline-earth oxides as promoters on Ru/AC (AC = activated carbon) catalysts was explored. Alkaline-earth metal oxides can reduce the agglomeration of ruthenium particles at high temperatures, which increases the amount of available ruthenium. The influence of the Mg promoter on the distribution and activity of the Ru/AC catalyst were investigated by CO chemisorption, X-ray diffraction, and energy dispersive spectrometry and by an activity test for ammonia synthesis. The results show that a specific quantity of magnesium significantly promotes the uniform distribution of Ba and Ru on the surface of AC, which enhances catalytic activity. The introduction of Mg significantly improved the size of the Ru particles and increased the Ru surface area. The distribution and interaction were improved greatly for the Ba promoter and the Ru precursor on the surface of the AC because of the addition of the Mg promoter. The introduction of magnesium to Ru-Ba-K/AC significantly improved the utilization ratio of the noble metals and the performance-price ratio.

Key words: barium, activated carbon, magnesium, ruthenium, ammonia synthesis