CRYSTALLIZATION KINETICS OF ZEOLITE-LTL

被引：59
|
作者：
JOSHI, PN
KOTASTHANE, AN
SHIRALKAR, VP
机构：
[1] National Chemical Laboratory, Pune
来源：
ZEOLITES | 1990年 / 10卷 / 06期
关键词：
activation energy; alkali metal cation effect; crystallization; LTL zeolite; sorption;
D O I：
10.1016/S0144-2449(05)80319-7
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：
Zeolites of Linde type L (LTL) have been synthesized at 393-453 K, and reaction parameters were found to be influenced by the source of reactants, the oxide mole composition of the gel, the crystallization temperature and period, and K2O/(K2O + Na2O) ratios. As the latter decreases to 0.67, crystallization becomes faster. At lower ratios, zeolite Y instead of zeolite L is obtained. Crystallization data were analyzed in terms of a first-order kinetics equation. The apparent activation energy for nucleation (En = 27-28 kcal mole-1) and crystal growth (Ec = 17.3 kcal mole-1) were evaluated by applying the Arrhenius equation. The solid products obtained were characterized by XRD, SEM, t.g. d.t.a., i.r., and sorption properties. © 1990 Butterworth-Heinemann.
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收藏
页码：598 / 602
页数：5
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