Kinetics of nucleation and crystallization of silicalite

Huang, Chi-Kai; Yu, Wanjun; Lee, T.Y.

doi:10.1016/0009-2509(86)87139-1

Cited by 11 publications

(2 citation statements)

References 3 publications

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“…The results for the crystallinity versus reaction time are shown in Figures 2-6. The nucleation rate is taken as the reciprocal of the time at which crystals start to take shape, and the rate of crystallization is taken as the slope at the corresponding half-maximum crystallinity on the crystallization curve (Culfaz and Sand, 1973; Huang et al, 1986). It is difficult to pinpoint the exact time of transition from nucleation to crystallization; therefore, in order to obtain the nucleation time correctly, sufficient data points are essential.…”

Section: Resultsmentioning

confidence: 99%

Synthesis kinetics of zeolite A

Hu¹,

Lee²

1990

Ind. Eng. Chem. Res.

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Section: Resultsmentioning

confidence: 99%

Synthesis kinetics of zeolite A

Hu¹,

Lee²

1990

Ind. Eng. Chem. Res.

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“…Such curves have been reported for over 30 years in the literature on zeolite synthesis, and they provide some indication of the progress of the synthesis reactions. Examples of such crystallization curves, as they are called, and thorough analyses of these, can be found in the literature (for example, Aiello et al, 1980;Culfaz and Sand, 1973; Dai et al, 1986Dai et al, , 1989Hayhurst and Sand, 1977;Hu and Lee, 1990; Huang et al, 1986;Schwieger et al, 1989).…”

mentioning

confidence: 99%

Analysis of zeolite crystallization using the "crystallization curve"

Ouden¹,

Thompson²

1992

Ind. Eng. Chem. Res.

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Crystallization Kinetics of Silicalite‐1: Use of Tetrapropylammonium Bromide and Chloride as Templates

Çulfaz

Gündüz

Orbey

1993

Cryst. Res. Technol.

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Silicalite-1, the aluminum-free end number of the ZSM-5 zeolites, was synthesized from a batch composition of 3.25 Na,O .40.0 SiO, . 552 H,O .2.00 TPA by using tetrapropylammonium bromide (TPA-Br) or chloride (TPA-Cl) as templates in the temperature range of 100 to 175 "C in a batch system. Conversion of silica in the starting batch composition into silicalite-1 in the product was followed quantitatively. The activation energies of nucleation and crystallization were determined as 37.2 and 66.5 kJ/mol, respectively. The use of TPA-CI as the template instead of TPA-Br results in longer induction period for crystallization to start and a larger crystal size in product.ZSM-5 zeolitinin aliiminyum ipermeyen tiirii olan silikalit-1, 3.25 Na,O '40.0 SiOz . 552 H,O '2.00 TPA bilegimindeki jel ipersinde tetrapropilamonyum bromiir (TPA-Br) ya da kloriir (TPA-Cl) gablon molekiilii kullanimiyla ve kesikli bir sistemde 100 -175 "C sicaklik araliginda sentez edilmigtir. BaglangiC bileSimindeki silikanin silikalit-1 iiriine doniigiimii nice1 olarak olqiilmiigtiir. Cekirdeklenme ve kristallegme iqin aktiflenme enerjileri 37.2 ve 66.5 kJ/mol olarak bulunmugtur. Sablon molekul olarak TPA-Br yerine TPA-CI kullanildiginda kristallegme baglangici iqin gepen siirenin uzadigi ve iiriin kristal boyutunun biiyiidiigii gozlenmigtir.

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Kinetics of nucleation and crystallization of silicalite

Cited by 11 publications

References 3 publications

Synthesis kinetics of zeolite A

Synthesis kinetics of zeolite A

Analysis of zeolite crystallization using the "crystallization curve"

Crystallization Kinetics of Silicalite‐1: Use of Tetrapropylammonium Bromide and Chloride as Templates

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