Microstructural evolution of condensed aggregates during the crystallization of ZSM-5 from a heterogeneous system

Edgar Cardenas; Wilson Aguilar-Mamani; Cheuk Wai Tai; Saul Cabrera; Jonas Hedlund; Johanne Mouzon

doi:10.1016/j.jcrysgro.2021.126188

Microstructural evolution of condensed aggregates during the crystallization of ZSM-5 from a heterogeneous system

Edgar Cardenas, Wilson Aguilar-Mamani, Cheuk Wai Tai, Saul Cabrera, Jonas Hedlund, Johanne Mouzon

Research output: Contribution to journal › Article › peer-review

Abstract

The microstructural evolution of precursors of ZSM-5 zeolite crystallized from a heterogeneous system using fumed silica, sodium aluminate and tetrapropylammonium ions as reagents is investigated. Entities previously described by Ren et al. (Chem. Mater. 2012, 24, 10, 1726-1737) as condensed aggregates, were extensively studied using scanning electron microscopy, and energy dispersive spectroscopy. It was observed that the condensed aggregates first comprise a core of nanocrystals that is enveloped by a shell of amorphous gel phase. During crystallization, the amorphous shell surrounding the core is converted into ZSM-5 crystals that grow to a film surrounding the core. The crystals in the film grow competitively with nutrients provided by the liquid phase from the surroundings, while the nanocrystals in the core show little or no signs of growth.

Original language	English
Article number	126188
Journal	Journal of Crystal Growth
Volume	568-569
DOIs	https://doi.org/10.1016/j.jcrysgro.2021.126188
State	Published - 15 Aug 2021

Bibliographical note

Funding Information:
The Swedish International Development Cooperation Agency (SIDA) is acknowledged for financially supporting the scientific work. The Knut and Alice Wallenberg foundation is acknowledged for financially supporting the Magellan SEM instrument at Luleå University of Technology and an equipment grant for the electron microscopy faculties at Stockholm University.

Funding Information:
This work was supported by the Swedish International Development Cooperation Agency (SIDA)

Funding Information:
The Swedish International Development Cooperation Agency (SIDA) is acknowledged for financially supporting the scientific work. The Knut and Alice Wallenberg foundation is acknowledged for financially supporting the Magellan SEM instrument at Lulea? University of Technology and an equipment grant for the electron microscopy faculties at Stockholm University.

Publisher Copyright:
© 2021 Elsevier B.V.

Keywords

A1. Characterization
A1. Crystal morphology
A2. Hydrothermal crystal growth
B1. Zeolite

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10.1016/j.jcrysgro.2021.126188

Cite this

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title = "Microstructural evolution of condensed aggregates during the crystallization of ZSM-5 from a heterogeneous system",

abstract = "The microstructural evolution of precursors of ZSM-5 zeolite crystallized from a heterogeneous system using fumed silica, sodium aluminate and tetrapropylammonium ions as reagents is investigated. Entities previously described by Ren et al. (Chem. Mater. 2012, 24, 10, 1726-1737) as condensed aggregates, were extensively studied using scanning electron microscopy, and energy dispersive spectroscopy. It was observed that the condensed aggregates first comprise a core of nanocrystals that is enveloped by a shell of amorphous gel phase. During crystallization, the amorphous shell surrounding the core is converted into ZSM-5 crystals that grow to a film surrounding the core. The crystals in the film grow competitively with nutrients provided by the liquid phase from the surroundings, while the nanocrystals in the core show little or no signs of growth.",

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AU - Cardenas, Edgar

AU - Aguilar-Mamani, Wilson

AU - Tai, Cheuk Wai

AU - Cabrera, Saul

AU - Hedlund, Jonas

AU - Mouzon, Johanne

PY - 2021/8/15

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AB - The microstructural evolution of precursors of ZSM-5 zeolite crystallized from a heterogeneous system using fumed silica, sodium aluminate and tetrapropylammonium ions as reagents is investigated. Entities previously described by Ren et al. (Chem. Mater. 2012, 24, 10, 1726-1737) as condensed aggregates, were extensively studied using scanning electron microscopy, and energy dispersive spectroscopy. It was observed that the condensed aggregates first comprise a core of nanocrystals that is enveloped by a shell of amorphous gel phase. During crystallization, the amorphous shell surrounding the core is converted into ZSM-5 crystals that grow to a film surrounding the core. The crystals in the film grow competitively with nutrients provided by the liquid phase from the surroundings, while the nanocrystals in the core show little or no signs of growth.

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KW - A1. Crystal morphology

KW - A2. Hydrothermal crystal growth

KW - B1. Zeolite

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Microstructural evolution of condensed aggregates during the crystallization of ZSM-5 from a heterogeneous system

Abstract

Bibliographical note

Keywords

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