BARIUM MODIFICATION OF A HIGH-SILICA ZEOLITE FOR METHANOL CONVERSION TO LIGHT ALKENES

被引：16

作者：

ABDILLAHI, MM

ELNAFATY, UA

ALJARALLAH, AM

机构：

[1] The Research Institute, King Fahd University of Petroleum and Minerals, Dhahran

来源：

APPLIED CATALYSIS A-GENERAL | 1992年 / 91卷 / 01期

关键词：

ALKENES; BARIUM MODIFICATION; CATALYST CHARACTERIZATION (DTA; SEM; TGA; XRD); HIGH-SILICA ZEOLITE; METHANOL CONVERSION;

D O I：

10.1016/0926-860X(92)85174-A

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 [物理化学]; 081704 [应用化学];

摘要：

High-silica zeolite (silicalite) was modified with barium resulting in reduced acid strength of the catalyst and better performance when compared with ZSM-5 and fresh silicalite in converting methanol to alkenes. Various concentrations of barium were ion-exchanged and impregnated to achieve the optimum loading of the modifier. The fresh and the modified zeolites were fully characterized by X-ray diffraction, scanning electron microscopy, thermogravimetric analysis, differential thermal analysis, as well as by surface area, chemical and other analyses. Barium silicalite has a lowered coke deposition and an improved active life when ion exchanged. The reverse was observed in the case of impregnation.

引用

页码：1 / 12

页数：12

共 34 条

[1]

CATALYTIC ACTIVITY AND SELECTIVITY IN THE CONVERSION OF METHANOL TO LIGHT OLEFINS [J].