Synthesis of the [Ga]-MFI under atmospheric pressure |
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Authors: | Jinu Park Sang-Bum Kim Jae-Mok Ha Myung-Soo Kim Hong-Soo Park Hyun-Sik Hahm |
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Affiliation: | (1) Department of Chemical Engineering, Myongji University, 449-728 Yongin, Korea;(2) Agency for Technology and Standards, 427-716 Kwacheon, Korea |
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Abstract: | The crystallization of the [Ga]-MFI was investigated as a function of synthesis time under atmospheric pressure. The molar composition of the reactants was 100SiO2-Ga2O3-llNa2O-llTPABr-3500H2O. The crystallinity of the [Ga]-MFT was examined by using several analytical instruments, such as XRD, XPS, XRF, FT-IR, solid-statemas-NMR, DTG/DTA, and SEM. The [Ga]-MFI was successfully synthesized under atmospheric pressure at 97 ‡C in 72 h. It was found that the nucleation of the [Ga]-MFI took a quite long time, but the crystallization took place very fast. It is supposed that nucleation is the rate-controlling step in the [Ga]-MFI synthesis under atmospheric pressure. Consequently, if the induction period of the nucleation can be shortened, it would be possible to synthesize the [Ga]-MFI commercially under atmospheric pressure. |
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Keywords: | Zeolite, [Ga]-MFI Gallosilicate Atmospheric Pressure Synthesis 71Ga-mas-NMR |
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