分子筛晶内扩散系数测定方法的研究进展  

Research advance in the measurement of intracrystalline diffusivities in zeolites

作　　者：兰学芳[1,2] 赵瑞玉[1,2] 赵愉生 赵元生 刘晨光[1,2] 

机构地区：[1]重质油国家重点实验室,中国石油大学(华东),山东青岛266555 [2]CNPC催化重点实验室,中国石油大学(华东),山东青岛266555 [3]中国石油石油化工研究院,北京100195

出　　处：《化工进展》2012年第1期62-68,共7页Chemical Industry and Engineering Progress

基　　金：国家重点基础研究发展计划(2010CB226905);教育部创新团队重质油高效转化的绿色化学与工程资助项目

摘　　要：表征沸石分子筛晶内扩散的基础理论和实验技术的发展,对促进沸石分子筛的深入研究及其在催化、吸附领域的应用具有十分重要的意义。本文较全面地评述了国内外沸石分子筛晶内扩散系数测定领域的研究现状。介绍了分子筛晶内扩散系数的基本分类及其影响因素;在此基础上综述了国内外测定晶内扩散系数的各种方法以及每种方法的优缺点。两类测定方法中,宏观法在工业领域应用广泛,微观法则适合于理论研究。最后,简要比较了晶内扩散系数多种方法的测定结果并对其发展方向进行了展望。Fundamental theory and experimental technology of intracrystalline diffusion characterization are greatly significant in research of zeolites and their application in catalysis and adsorption field.This review summarizes the intracrystalline diffusivity measurements worldwide.Classification and influence factors of intracrystalline diffusion are introduced.Strengths and weaknesses of these methods are analyzed and different characterization results are compared.Macro-method is suitable for industry research,while micro-method possesses advantages in theoretical research.Finally,the development trend and challenge in intracrystalline diffusivity characterization are proposed.

关 键 词：分子筛 扩散系数 晶内扩散 测定方法 

分 类 号：O641[理学—物理化学]