IN-SITU MEASUREMENT OF CRYSTAL-GROWTH RATE OF ZEOLITE

被引：34

作者：

IWASAKI, A

HIRATA, M

KUDO, I

SANO, T

SUGAWARA, S

ITO, M

WATANABE, M

机构：

[1] ELECTROTECH LAB,TSUKUBA,IBARAKI 305,JAPAN

[2] JAPAN ADV INST STUDIES SCI & TECHNOL,TATSUNOKUCHI,ISHIKAWA,JAPAN

[3] ISHIKAWAJIMA HARIMA HEAVY IND CO LTD,TOKYO 135,JAPAN

来源：

ZEOLITES | 1995年 / 15卷 / 04期

关键词：

ZSM-5; ZEOLITE; SILICALITE; IN SITU OBSERVATION; CRYSTAL GROWTH RATE;

D O I：

10.1016/0144-2449(94)00068-4

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 ; 081704 ;

摘要：

To clarify the growth behavior of zeolite crystals under hydrothermal synthesis conditions, the growth process of ZSM-5 type zeolite crystals was studied using two kinds of in situ observation apparatus. Direct observation of ZSM-5 crystals from amorphous gels during steaming and silicalite crystals from clear aqueous solutions was performed. During the stationary growing stage, a constant rate of crystal growth of zeolites was observed directly for both zeolite crystals. In the case of ZSM-5 zeolites from gels, it was also found that after a certain induction time, crystals grew to 10-20 mu m in size, after which no further growth was observed. On the other hand, in the case of silicalite crystals from aqueous solutions, the induction time hardly existed. The size distribution of crystals and the activation energy for crystal growth are also discussed.

引用

页码：308 / 314

页数：7

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