钾改性铁-钼碳化物CO加氢合成低碳混合醇的研究  

Higher alcohols synthesis from syngas over K-promoted Fe-Mo carbide catalyst

作　　者：王宁[1,2] 房克功[1] 林明桂[1] 姜东[1] 李德宝[1] 孙予罕[1] 

机构地区：[1]中国科学院山西煤炭化学研究所煤转化国家重点实验室,山西太原030001 [2]中国科学院研究生院,北京100039

出　　处：《天然气化工—C1化学与化工》2010年第2期6-9,共4页Natural Gas Chemical Industry

基　　金：国家自然科学基金重大项目(20590363);Shell合成醇项目资助项目

摘　　要：使用程序升温反应法制备了一系列K改性的铁-钼碳化物催化剂,用XRD、SEM及XPS进行了表征,并对其CO加氢合成低碳混合醇性能进行了考察。结果表明,K改性的铁-钼碳化物催化剂,其产物中具有较高的低碳混合醇的选择性。K助剂与碳化物主体之间的电子作用导致其CO加氢产物选择性发生显著变化,这可能与该催化剂表面"K-Fe-Mo-C"新相的生成有关。XPS表征显示,在该催化剂中存在的Mo4+对应于醇的生成,而Mo2+则对应于烃类的生成。另外,对该催化剂CO加氢的温度效应也进行了考察。A series of K promoted Fe-Mo molybdenum carbide catalysts were prepared by temperature-programmed-reaction method, and characterized by the XRD, SEM and XPS. Catalytic performances of the catalysts for higher alcohols synthesis from syngas were investigated. The results indicated that K promoted Fe-Mo molybdenum carbide was a potential catalyst for higher alcohols synthesis due to its high selectivity which was attributed to the formation of new ＂K-Fe-Mo-C＂ species on catalyst surface. XPS characterization suggested that the Mo4＋ species and Mo2＋ species on the surface of catalysts was relevant to the formation of alcohols and hydrocarbons, respectively. Furthermore, the effects of temperature on reaction were also investigated.

关 键 词：K改性 β-碳化钼 碳化铁 CO加氢 低碳醇合成 

分 类 号：O643[理学—物理化学]