微波固相法快速制备Cu-ZSM-5催化剂  

Rapid Preparation of Cu-ZSM-5 by Solid-state Reaction under Microwave

作　　者：任文明[1] 周继承[1] 阳鹏飞[1] 

机构地区：[1]湘潭大学化工学院,湖南湘潭411105

出　　处：《纳米科技》2010年第3期24-26,30,共4页

基　　金：国家自然科学基金项目（编号：20976147）

摘　　要：以乙酸铜为原料,ZSM-5沸石分子筛为载体,采用微波固相法制备了Cu-ZSM-5催化剂,通过原子吸收（AAS）测定了不同投料比（mCu（AC）2.H2O：mZSM-5）、微波作用的温度和微波作用的时间对Cu负载量的影响,并通过FT-IR、XRD等方法对Cu-ZSM-5的结构和物性进行了表征,结果表明,微波固相法可将Cu（AC）_2完全分散于ZSM-5分子筛表面,Cu的负载量可高达23.11wt%,分散的Cu（AC）_2与分子筛表面羟基作用形成了新的Cu-O键,这种经过Cu（AC）_2修饰的ZSM-5表面具有更加温和的Lewis酸性。Cu-ZSM-5 catalysts were prepared by microwave solid-state method using Cu（AC）2 as raw material and ZSM- 5 zeolites as support. The effects of Cu loading were determined at different feed ratio （mCu（AC）2.H2O：mZSM-5）,microwave- induced temperature and microwave irradiation time, and measured by AAS. The structure and properties of Cu-ZSM-5 were characterized by F/＇-IR and XRD.The XRD results show that Cu （AC）2 can be completely dispersed in ZSM-5 zeolite surface by solid-state reaction under microwave, AAS and FT-IR results show that only 20min Cu （AC）2 can be able to completely dispersed in zeolite pore and the surface, while the amount of Cu loading of catalysts can be up to 23.11 wt%. In order to interact between dispersed Cu （AC）2 and the zeolite surface hydroxyl groups, new Cu-O bonds were generated to instead of the original Si-O bond, and the modified ZSM-5 surface has a more moderate Lewis acidity.

关 键 词：微波 ZSM-5分子筛 乙酸铜 负载率 

分 类 号：O643[理学—物理化学]