东篱科研大数据发现系统（DRDS）

位置：成果数据库 > 期刊 > 期刊详情页

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

期刊名称：催化学报，2006，27(7): 596-600
时间：0
分类：O643[理学—物理化学;理学—化学] TQ54[化学工程—煤化学工程]
作者机构：[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
相关基金：国家自然科学基金（20590360）,国家重点基础研究发展计划（973计划）（2005CB221406）和四川大学创新基金（2005CF07）资助项目.
相关项目：能源发展中的若干关键化学科学基础问题

关键词：碳纳米管, 铑, 锰, 铈, 一氧化碳, 加氢, 含氧化合物, carbon nanotube, rhodium, manganese, cerium, carbon monoxide, hydrogenation, oxygenates

中文摘要：

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336．2g／（kg·h）．

英文摘要：

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 %.