Cr-MCM-41分子筛的合成、表征及其催化性能  

Synthesis, characterization and catalytic properties of Cr-MCM-41 molecular sieves

作　　者：庄红[1] 周广栋[1] 刘涛[2] 毕颖丽[1] 程铁欣[1] 甄开吉[1] 

机构地区：[1]吉林大学化学学院物理化学研究所 [2]中国科学院高能物理研究所同步辐射实验室,北京100039

出　　处：《吉林大学学报（理学版）》2004年第3期447-450,共4页Journal of Jilin University:Science Edition

基　　金：国家自然科学基金(批准号:29873018).

摘　　要：合成了一系列掺杂Cr的MCM 41分子筛,并用XRD,IR和EXAFS等手段表征了催化剂.实验结果表明,一部分Cr离子进入到MCM 41骨架,另一部分Cr离子以其他Cr化合物形式存在且这部分铬可通过NH4Ac溶液洗去.Cr MCM 41和Cr MCM 41 t催化剂在十八醇选择氧化反应的几个循环中表现了稳定的十八醇转化率和十八酸选择性.A series of Cr-containing MCM-41 molecular sieves has been synthesized and characterized by XRD, IR and Extend X-ray Absorption Fine Structure(EXAFS) techniques. It has been shown that a certain amount of chromium ions has been incorporated into the framework of MCM-41 and the rest part of the contained Cr ions still existed as other types of Cr-containing compounds, which can be washed off by a NH_4Ac solution. The (octadecan-)1-ol conversion and (octadecanoic) acid selectivity are not decreased after Cr-MCM-41 and Cr-MCM-41-t catalysts have been repeatedly used for the selective oxidation of octadecan-1-ol to octadecanoic acid.

关 键 词：Cr-MCM-41分子筛 十八醇 催化氧化 EXAFS 

分 类 号：O643.38[理学—物理化学]