无胺合成[Fe]ZSM-5分子筛的结构鉴定及其催化性能的研究

高等学校化学学报 ›› 1992, Vol. 13 ›› Issue (12): 1503.

无胺合成[Fe]ZSM-5分子筛的结构鉴定及其催化性能的研究

岳瑛, 沈文霞, 颜贻春, 丁莹如

南京大学化学系, 南京, 210008

收稿日期:1992-03-30 修回日期:1992-07-11 出版日期:1992-12-24 发布日期:1992-12-24
通讯作者: 沈文霞

Identification of Structure and Investigation of Catalytic Properties on [Fe]ZSM-5 Zeolite Synthesized Without Amines

YUE Ying, SHEN Wen-Xia, YEN Yi-Chun, DING Ying-Ru

Department of Chemistry, Nanjing University, Nanjing, 210008

Received:1992-03-30 Revised:1992-07-11 Online:1992-12-24 Published:1992-12-24

摘要/Abstract

摘要： 不用有机胺为模板剂,在碱性介质中采用水热合成法成功地合成了[Fe]ZSM-5分子筛.用X射线衍射、透射电镜、红外光谱、顺磁共振谱、X射线光电子能谱和穆斯堡尔谱等对其结构进行了表征,结果表明,Fe原子进入了分子筛骨架,并处于四面体的配位环境.在由甲醇转化为汽油的过程中,以本文合成的[Fe]ZSM-5与用有机胺为模板剂合成的[Fe]ZSM-5分子筛为催化剂相比,其活性和选择性几乎相同,且都比通常的H[Al]ZSM-5好,C₅组分以上的选择性大于80%,且芳烃(包括脂环烃)和异构烃的含量达75%以上.

关键词: 无胺合成[Fe]ZSM-5, Fe配位环境的谱学研究, 改良MTG过程

Abstract: [Fe]ZSM-5 Zeolite was synthesized successfully in a alkaline medium by the hydrothermal crystallization method without amines as the templates.The structure of [Fe]ZSM-5 zeolite was identified by means of XRD,TEM,IR,EPR,XPS and Mossbauer spectroscopies.It was proved that the structure of product is a typical ZSM-5 type and Fe³⁺ ions were introduced into the ZSM-5 framework and were in the lattice of zeolite with a tetrahedral environment.In the conversion reaction from methanol to gasoline he catalytic activity and selectivity of H[Fe]ZSM-5 zeolite synthesized without amines are the same as those of H[Fe]ZSM-5 zeolite synthesized with amine and are much better than those of H[Al]ZSM-5 zeolite.The selectivity for C₅⁺ products is over 80% and the components of aromatic hydrocarbons and isoalkanes in C₅⁺ products are over 75%.

Key words: Synthesis of [Fe]ZSM-5 zeolite without amine, Study of Fe³⁺ coordination environment by spectroscopies, Improved MTG process

TrendMD:

岳瑛, 沈文霞, 颜贻春, 丁莹如. 无胺合成[Fe]ZSM-5分子筛的结构鉴定及其催化性能的研究. 高等学校化学学报, 1992, 13(12): 1503.

YUE Ying, SHEN Wen-Xia, YEN Yi-Chun, DING Ying-Ru . Identification of Structure and Investigation of Catalytic Properties on [Fe]ZSM-5 Zeolite Synthesized Without Amines. Chem. J. Chinese Universities, 1992, 13(12): 1503.