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Title: The Influence of Reactants and Al/Ga/Si Ratios on the Synthesis of CGS Structured Zeolites

Abstract

ECR-9 (CGS) zeolites have been synthesized from gallosilicate and gallo-aluminosilicate gels at between 100 {sup o}C and 220 {sup o}C using several Al and Si reactant types. Aluminum was substituted for gallium in the framework at levels up to 20% in seeded syntheses, but higher Al substitutions promote the crystallization of impurities. This is the first report of a gallo-aluminosilicate CGS composition. We successfully used the Simulated Framework Annealing method to solve the structural topology as if ECR-9 was a novel gallosilicate. The structure was refined using Rietveld full profile analysis (wRp = 14.6%) of powder synchrotron X-ray diffraction data.

Authors:
; ;
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL) National Synchrotron Light Source
Sponsoring Org.:
Doe - Office Of Science
OSTI Identifier:
930019
Report Number(s):
BNL-80633-2008-JA
TRN: US0806685
DOE Contract Number:
DE-AC02-98CH10886
Resource Type:
Journal Article
Resource Relation:
Journal Name: Microporous and Mesoporous Materials; Journal Volume: 104; Journal Issue: 39450
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; ALUMINIUM; ANNEALING; CRYSTALLIZATION; DATA; GALLIUM; GELS; IMPURITIES; POWDERS; SYNCHROTRON RADIATION; SYNTHESIS; TOPOLOGY; X-RAY DIFFRACTION; ZEOLITES; national synchrotron light source

Citation Formats

Strohmaier,K., Vaughan, D., and Zhang, B. The Influence of Reactants and Al/Ga/Si Ratios on the Synthesis of CGS Structured Zeolites. United States: N. p., 2007. Web. doi:10.1016/j.micromeso.2007.02.038.
Strohmaier,K., Vaughan, D., & Zhang, B. The Influence of Reactants and Al/Ga/Si Ratios on the Synthesis of CGS Structured Zeolites. United States. doi:10.1016/j.micromeso.2007.02.038.
Strohmaier,K., Vaughan, D., and Zhang, B. Mon . "The Influence of Reactants and Al/Ga/Si Ratios on the Synthesis of CGS Structured Zeolites". United States. doi:10.1016/j.micromeso.2007.02.038.
@article{osti_930019,
title = {The Influence of Reactants and Al/Ga/Si Ratios on the Synthesis of CGS Structured Zeolites},
author = {Strohmaier,K. and Vaughan, D. and Zhang, B.},
abstractNote = {ECR-9 (CGS) zeolites have been synthesized from gallosilicate and gallo-aluminosilicate gels at between 100 {sup o}C and 220 {sup o}C using several Al and Si reactant types. Aluminum was substituted for gallium in the framework at levels up to 20% in seeded syntheses, but higher Al substitutions promote the crystallization of impurities. This is the first report of a gallo-aluminosilicate CGS composition. We successfully used the Simulated Framework Annealing method to solve the structural topology as if ECR-9 was a novel gallosilicate. The structure was refined using Rietveld full profile analysis (wRp = 14.6%) of powder synchrotron X-ray diffraction data.},
doi = {10.1016/j.micromeso.2007.02.038},
journal = {Microporous and Mesoporous Materials},
number = 39450,
volume = 104,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}