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Exploring Hydrothermal Synthesis of SAPO-18 under High Hydrostatic Pressure.

ABSTRACT: The effect of external hydrostatic pressure on the hydrothermal synthesis of the microporous silicoaluminophosphate SAPO-18 has been explored. The crystallization of the SAPO-18 phase is inhibited at 150 °C under high pressures (200 MPa) when using relatively diluted synthesis mixtures. On the contrary, the use of concentrated synthesis mixtures allowed SAPO-18 to be obtained in all the studied conditions. The obtained solids were characterized with XRD, SEM, ICP-AES, TG and 27Al and 31P MAS NMR spectroscopy. The results highlight the importance of the external pressure effect on the hydrothermal synthesis of molecular sieves and its influence on the interaction between the organic molecule and the silicoaluminophosphate network.

SUBMITTER: Simancas R

PROVIDER: S-EPMC8838306 | biostudies-literature | 2022 Jan

REPOSITORIES: biostudies-literature

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Exploring Hydrothermal Synthesis of SAPO-18 under High Hydrostatic Pressure.

Simancas Raquel R Takemura Masamori M Yonezawa Yasuo Y Sukenaga Sohei S Ando Mariko M Shibata Hiroyuki H Chokkalingam Anand A Iyoki Kenta K Okubo Tatsuya T Wakihara Toru T

Nanomaterials (Basel, Switzerland) 20220126 3

The effect of external hydrostatic pressure on the hydrothermal synthesis of the microporous silicoaluminophosphate SAPO-18 has been explored. The crystallization of the SAPO-18 phase is inhibited at 150 °C under high pressures (200 MPa) when using relatively diluted synthesis mixtures. On the contrary, the use of concentrated synthesis mixtures allowed SAPO-18 to be obtained in all the studied conditions. The obtained solids were characterized with XRD, SEM, ICP-AES, TG and <sup>27</sup>Al and ...[more]

PMID: 35159741

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