Data di Pubblicazione:
2024
Citazione:
High-pressure adsorption phenomena in natural and synthetic zeolites with EAB topology / T. Battiston, D. Comboni, P. Lotti, G. Ferrarelli, M. Migliori, G. Giordano, M. Hanfland, G. Garbarino, H. Liermann, G. Diego Gatta. - In: MICROPOROUS AND MESOPOROUS MATERIALS. - ISSN 1387-1811. - 365:(2024 Feb 01), pp. 112873.1-112873.10. [10.1016/j.micromeso.2023.112873]
Abstract:
The high-pressure behaviour and the crystal-fluid interaction of zeolites with EAB topology were investigated by in-situ single-crystal and powder synchrotron X-ray diffraction, both on synthetic and natural samples. The experiments were conducted using a diamond anvil cell and different pressure transmitting fluids, including: the
non-penetrating silicone oil and the potentially penetrating methanol:ethanol:H2O = 16:3:1 mixture, methanol and distilled H2O. The zeolites intrinsic compressional behaviour investigated with a non-penetrating fluid showed the significant role of the extra framework population on the bulk compressibility. Notably, within the first ~0.5 GPa of the silicone oil ramp, the bulk modulus (KV0 = 1/βV0) resulted to be KV0 = 62(1) GPa for the natural bellbergite and KV0 = 16(4) GPa for the synthetic K-analogue. The synthetic EAB zeolites demonstrated a high host capacity for methanol molecules, which were not able to penetrate the natural bellbergite cavities. A comparative analysis
between the behaviour of zeolites with EAB topology and structurally similar zeolites, such as erionite (ERI topology) and offretite (OFF), is provided.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
EAB-Type zeolite; Synchrotron X-ray diffraction; Structure refinement; High-pressure; Compressibility; Crystal-fluid interaction
Elenco autori:
T. Battiston, D. Comboni, P. Lotti, G. Ferrarelli, M. Migliori, G. Giordano, M. Hanfland, G. Garbarino, H. Liermann, G. Diego Gatta
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