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

Journal Article · Mon Jan 01 00:00:00 EST 2007 · Microporous and Mesoporous Materials

DOI:https://doi.org/10.1016/j.micromeso.2007.02.038· OSTI ID:930019

Strohmaier, K; Vaughan, D; Zhang, B

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.

• Research Organization: Brookhaven National Lab. (BNL), Upton, NY (United States). National Synchrotron Light Source
• Sponsoring Organization: Doe - Office Of Science
• DOE Contract Number: DE-AC02-98CH10886
• OSTI ID: 930019
• Report Number(s): BNL-80633-2008-JA; TRN: US0806685
• Journal Information: Microporous and Mesoporous Materials, Vol. 104, Issue 39450
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
ALUMINIUM
ANNEALING
CRYSTALLIZATION
DATA
GALLIUM
GELS
IMPURITIES
POWDERS
SYNCHROTRON RADIATION
SYNTHESIS
TOPOLOGY
X-RAY DIFFRACTION
ZEOLITES
national synchrotron light source