Abstract
The zeolite beta is a crystalline synthetic aluminosilicate with wide-pore size (6 to 9 A) and a Si/Al ratio from 5 to 100. In this study, we have investigated the influence of several synthesis parameters on the physicochemical properties of the materials. The synthesis of zeolite beta has been performed by hydrothermal method, the aluminum source and gallium content in the structure being variable. The structural characterization was carried out by means of X-ray diffraction, SEM and 27Al and 71Ga MAS NMR spectroscopy. When the aluminum sulfate is used as aluminium source, zeolite beta with higher crystallinity is generated. All the samples showed a XRD pattern similar to crystalline zeolite beta and the 27Al and 71Ga MAS NMR spectrum demonstrated that the incorporation of both heteroatoms was efficient.
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