Rare earth elements:Properties and applications to methanol synthesis catalysis via hydrogenation of carbon oxides

作     者：Anthony R.Richard Maohong Fan 

作者机构：Department of Chemical EngineeringUniversity of WyomingLaramieWY 82071USA School of Energy ResourcesUniversity of WyomingLaramieWY 82071USA 

出 版 物：《Journal of Rare Earths》 (稀土学报（英文版）)

年 卷 期：2018年第36卷第11期

页      面：1127-1135页

核心收录：

学科分类：081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术] 

基　　金：State of Wyoming 

主　　题：Methanol synthesis Rare earth Lanthanides Catalysis Hydrogenation 

摘      要：Methanol （CH3OH） is an important industrial chemical with a wide variety of uses. Industrial methanol synthesis catalysts are typically composed of Cu, Zn, and AI, but the use of catalysts incorporating rare earth elements has been shown to improve the catalytic performance. Due to their unique chemical and physical properties, the use of rare earth elements （scandium, yttrium, and the lanthanides） in catalysis in general has continued to increase over the past few decades, while the use of rare earth in methanol synthesis catalysts has not, despite often improving pertbrmance. The ability of several of the rare earth elements （Pr, Ce, Eu, Tb, Yb） to easily switch between oxidation states makes them beneficial for many different types of catalysts. However, for methanol synthesis the surface basicity is an important property, and the basic nature of the rare earth elements can be used to tune the basicity of catalysts. A small number of correlations between rare earth properties and catalytic performance have been observed, but often do not apply to other catalysts. Properties such as strength of basic sites, ionic radius, and etec- tronegativity have been found to correlate with performance results such as activity or selectivity.