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.

引用

页码：598 / 602

页数：5

共 26 条

[1] HYDROCARBONS IN ZEOLITE L .I. SORPTION ISOTHERMS AND ENTHALPIES
BARRER, RM
LEE, JA
[J]. SURFACE SCIENCE, 1968, 12 (02) : 341 - &
[2] CRYSTAL STRUCTURE OF SYNTHETIC ZEOLITE L
BARRER, RM
VILLIGER, H
[J]. ZEITSCHRIFT FUR KRISTALLOGRAPHIE KRISTALLGEOMETRIE KRISTALLPHYSIK KRISTALLCHEMIE, 1969, 128 (3-6): : 352 - &
[3] CHEMISTRY OF SOIL MINERALS .14. ACTION OF SOME BASIC SOLUTIONS ON METAKAOLINITE AND KAOLINITE
BARRER, RM
BEAUMONT, R
COLLELA, C
[J]. JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS, 1974, (09): : 934 - &
[4] CHEMISTRY OF SOIL MINERALS .12. TRANSFORMATIONS OF METAKAOLINITE WITH SOLUTIONS CONTAINING BARIUM HYDROXIDE
BARRER, RM
MAINWARING, DE
[J]. JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS, 1972, (12): : 1259 - +
[5] BOROWIAK MA, 1973, WIAD CHEM, V27, P577
[6] Breck D. W., 1965, US Patent, Patent No. 3216789
[7] BRECK DW, 1836, Patent No. 711565
[8] Breck DW, 1968, MOL SIEVES, P47
[9] KINETIC-STUDIES ON THE FORMATION OF ZEOLITE ZSM-5
CHAO, KJ
TASI, TC
CHEN, MS
WANG, I
[J]. JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS I, 1981, 77 : 547 - 555
[10] KINETICS OF ZEOLITE A CRYSTALLIZATION
CIRIC, J
[J]. JOURNAL OF COLLOID AND INTERFACE SCIENCE, 1968, 28 (02) : 315 - &

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