CRYSTALLIZATION OF SILICALITE-1 IN THE PRESENCE OF FLUORIDE IONS

被引：28

作者：

MOSTOWICZ, R

CREA, F

NAGY, JB

机构：

[1] UNIV CALABRIA, DIPARTMENTO CHIM, I-87036 RENDE, ITALY

[2] FAC UNIV NAMUR, CATALYSE LAB, NAMUR, BELGIUM

来源：

ZEOLITES | 1993年 / 13卷 / 08期

关键词：

SILICALITE-1; FLUORIDES; CRYSTALLIZATION RATE; CRYSTAL GROWTH; CRYSTAL HABITUS;

D O I：

10.1016/0144-2449(93)90142-P

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：

Silicalite of MFI structure has been synthesized in the presence of NaF from the systems of variable fluoride content or variable HF/NaF ratio. Regularly sized 80-120 mu m crystals are obtained. The time taken for the appearance of 4% crystallinity (t(n)), the crystallization rate (% d(-1)), and the crystal growth rate (mu m d(-1)) are found to be a function of fluoride content. The apparent energies for the different rates have been determined: E(n), for the appearance of 4% crystallinity, 10.4-10.9 kcal mol-l; E(c), for the crystallization rate, ca. 10 kcal mol(-1); and E(l) for the crystal growth rate, 8.2-11.3 kcal mol(-1).

引用

页码：678 / 684

页数：7

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