What question did this study set out to answer?

To evaluate how fluoride versus hydroxide mineralizing agents influence aluminum distribution and resulting acid site strength across varying silicon-to-aluminum ratios in ZSM-5 zeolites.

December 21, 2022Angewandte ChemieOpen Access

Impact of Mineralizing Agents on Aluminum Distribution and Acidity of ZSM‐5 Zeolites

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Authors

SAShadi Al‐Nahari EDEddy Dib CCClaudia Cammarano

Discussion

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Overview

Experimental study demonstrates mineralizing agents modulate aluminum distribution and acidity profiles in ZSM-5 zeolites, highlighting electrostatic control for catalyst design.

Key Points

To evaluate how fluoride versus hydroxide mineralizing agents influence aluminum distribution and resulting acid site strength across varying silicon-to-aluminum ratios in ZSM-5 zeolites.
Synthesized ZSM-5 zeolites across a wide silicon-to-aluminum range (Si/Al = 30 to 760) via hydrothermal synthesis using either fluoride (F−) or hydroxide (OH−) mineralizing agents.
Probed aluminum coordination environments and spatial site distribution using solid-state aluminum-27 nuclear magnetic resonance (27Al NMR) spectroscopy.
Fluoride mineralizers caused aluminum site proportions to vary systematically with the silicon-to-aluminum ratio, whereas hydroxide mineralizers maintained invariant aluminum distributions across the entire range (Si/Al = 30 to 760).
Contrasting aluminum arrangements led to opposing trends in weak versus strong acidity profiles between fluoride- and hydroxide-synthesized zeolites.
Discrepancies in aluminum siting were linked to spatial negative charge locations and the resulting competition between short- and long-range electrostatic forces during crystallization.

Cite This Study

Al‐Nahari et al. (2022) studied this question.

synapsesocial.com/papers/6aaa35762d57de3e8317360a https://doi.org/10.1002/ange.202217992

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December 21, 2022Angewandte ChemieOpen Access

Impact of Mineralizing Agents on Aluminum Distribution and Acidity of ZSM‐5 Zeolites

View Full Paper

Ask AI

Bookmark

Authors

SAShadi Al‐Nahari EDEddy Dib CCClaudia Cammarano

Discussion

Member takes

Overview

Experimental study demonstrates mineralizing agents modulate aluminum distribution and acidity profiles in ZSM-5 zeolites, highlighting electrostatic control for catalyst design.

Key Points

To evaluate how fluoride versus hydroxide mineralizing agents influence aluminum distribution and resulting acid site strength across varying silicon-to-aluminum ratios in ZSM-5 zeolites.
Synthesized ZSM-5 zeolites across a wide silicon-to-aluminum range (Si/Al = 30 to 760) via hydrothermal synthesis using either fluoride (F−) or hydroxide (OH−) mineralizing agents.
Probed aluminum coordination environments and spatial site distribution using solid-state aluminum-27 nuclear magnetic resonance (27Al NMR) spectroscopy.
Fluoride mineralizers caused aluminum site proportions to vary systematically with the silicon-to-aluminum ratio, whereas hydroxide mineralizers maintained invariant aluminum distributions across the entire range (Si/Al = 30 to 760).
Contrasting aluminum arrangements led to opposing trends in weak versus strong acidity profiles between fluoride- and hydroxide-synthesized zeolites.
Discrepancies in aluminum siting were linked to spatial negative charge locations and the resulting competition between short- and long-range electrostatic forces during crystallization.

Cite This Study

Al‐Nahari et al. (2022) studied this question.

synapsesocial.com/papers/6aaa35762d57de3e8317360a https://doi.org/10.1002/ange.202217992

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