催化学报

催化学报 ›› 2006, Vol. 27 ›› Issue (7): 596-600.

• 研究论文 • 上一篇    下一篇

碳纳米管对Rh-Ce-Mn/SiO2催化剂催化CO加氢合成含氧化合物性能的影响

黄利宏1,2,储伟1,洪景萍1,罗仕忠1   

  1. 1 四川大学化学工程学院, 四川成都 610065; 2 西华大学生物工程学院, 四川成都 610039
  • 收稿日期:2006-07-25 出版日期:2006-07-25 发布日期:2006-07-25

Effect of Carbon Nanotubes on Activity of Rh-Ce-Mn/SiO2 Catalyst for CO Hydrogenation to Oxygenates

HUANG Lihong1,2, CHU Wei1*, HONG Jingping1, LUO Shizhong1   

  1. 1 Department of Chemical Engineering, Sichuan University, Chengdu 610065, Sichuan, China; 2 School of Bioengineering, Xihua University, Chengdu 610039, Sichuan, China
  • Received:2006-07-25 Online:2006-07-25 Published:2006-07-25

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935

被引次数

35

摘要： 制备了碳纳米管(CNTs)促进的Rh-Ce-Mn/SiO2催化剂,采用X射线光电子能谱、程序升温还原、 N2物理吸附、 X射线衍射以及吸附H2或CO的程序升温脱附对催化剂进行了表征,并考察了催化剂对CO加氢合成含氧化合物的催化性能. 结果表明, CNTs的添加促进了铑的分散,铑及助剂在载体表面发生富集; 活性组分铑与助剂及载体间的相互作用和催化剂样品的还原性能发生了改变; 在铑基催化剂中加入CNTs后,强吸附的H2和CO的量明显增大. CNTs促进的铑基催化剂的CO加氢活性明显提高,当CNTs添加量为10%时,一定条件下催化剂上含氧化合物的时空收率可达336.2 g/(kg·h).

关键词: 碳纳米管, 铑, 锰, 铈, 一氧化碳, 加氢, 含氧化合物

Abstract: The carbon nanotubes (CNTs)-promoted Rh-Ce-Mn/SiO2 catalysts were prepared by the impregnation method and characterized by X-ray photoelectron spectroscopy (XPS), temperature-programmed reduction, N2 adsorption, X-ray diffraction (XRD), and temperature-programmed desorption of H2 or CO. The catalytic performance of Rh-Ce-Mn-CNTs/SiO2 for CO hydrogenation to oxygenates was investigated. The results of XPS and XRD showed that the introduction of CNTs improved the dispersion of Rh and caused an enrichment of active components on the catalyst surface. Meanwhile, the addition of CNTs modified the interaction between rhodium and other components, and the amount of strongly adsorbed H2 or CO on the surface of the catalyst was increased remarkably. The results of CO hydrogenation showed that the existence of CNTs enhanced the activity of the Rh-Ce-Mn/SiO2 catalyst. Under the specific reaction conditions, the CO conversion was 11.86% and the yield of oxygenates was 336.2 g/(kg•h) when the CNTs content was 10%.

Key words: carbon nanotube, rhodium, manganese, cerium, carbon monoxide, hydrogenation, oxygenates