Elastic behavior of MFI-type zeolites: Compressibility of H-ZSM-5 in penetrating and non-penetrating media

Quartieri, Simona; Montagna, G.; Arletti, Rossella; Vezzalini, Giovanna

doi:10.1016/j.jssc.2011.04.026

Cited by 24 publications

(38 citation statements)

References 35 publications

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“…As a consequence, some zeolites characterized by large pores can be unexpectedly less compressible than other pure-Si phases with empty cavities. Various authors [7][8][9][10][11][12][13] came to the same conclusions working on materials sharing the same framework type, but with different extra-frameworks and framework compositions. The compression of zeolites using non-penetrating media has also been exploited to induce the so-called ''pressureinduced amorphization'' (PIA).…”

Section: Introductionmentioning

confidence: 91%

“…ref. [4][5][6][7][8][9][10][11][12][13]. High-pressure studies performed using pore penetrating media have attracted great attention because of the so-called pressure-induced hydration effect (PIH), 14 in which the water content inside the cavity increases in response to the applied pressure through selective sorption of H 2 O molecules from the PTM.…”

Section: Introductionmentioning

confidence: 99%

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Pressure-induced penetration of guest molecules in high-silica zeolites: the case of mordenite

Arletti

Leardini

Vezzalini

et al. 2015

Phys. Chem. Chem. Phys.

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A synthetic high-silica mordenite (HS-MOR) has been compressed in both non-penetrating (silicone oil, s.o.) and penetrating [methanol : ethanol : water (16 : 3 : 1) (m.e.w.), water : ethanol (3 : 1) (w.e.), and ethylene glycol (e.gl.)] pressure transmitting media (PTM). In situ high-pressure (HP) synchrotron X-ray powder diffraction (XRPD) experiments allowed the unit cell parameters to be followed up to 1.6, 1.8, 8.4, and 6.7 GPa in s.o., w.e., m.e.w., and e.gl., respectively. Moreover, e.gl. was also used as a PTM in in situ HP Raman and ex situ IR experiments. The structural refinement of HS-MOR compressed in e.gl.at 0.1 GPa -the lowest investigated pressure -revealed the presence of 3.5 ethylene glycol molecules per unit cell. The infrared spectrum of the recovered sample, after compression to 1 GPa, is consistent with the insertion of ethylene glycol molecules in the pores. XRPD and Raman spectroscopy experiments performed under pressure indicated the insertion of a small number of guest molecules. Ethylene glycol is partially retained inside mordenite upon pressure release. A symmetry lowering was observed in s.o. above 0.8 GPa, while above 1.6 GPa the patterns indicated a rapid loss of long range order. From ambient pressure (P amb ) to 1.6 GPa, a high cell volume contraction (DV = À9.5%) was determined. The patterns collected with penetrating PTM suggested the penetration of guest molecules into the porous host matrix, starting from a very low P regime. The entrapment of PTM molecules inside micropores contributes to the stiffening of the structure and, as a consequence, to the decrease of the compressibility with respect to that measured in s.o. From the structural point of view, HS-MOR reacts to compression and to the penetration of different guest species with appropriate framework deformations. Interestingly, ethylene glycol is partially retained inside mordenite upon pressure release, which is of importance for potential application of this composite material.

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Section: Introductionmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Pressure-induced penetration of guest molecules in high-silica zeolites: the case of mordenite

Arletti

Leardini

Vezzalini

et al. 2015

Phys. Chem. Chem. Phys.

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“…An analogous comparison based on structural results is impossible, due to the lack of structural data on the HP-behavior of silicalite in m.e.w. The only data available in literature regard Na- [23] and H-ZSM5 [24].…”

Section: Water Confinement and Condensation In Hydrophobic Zeolitesmentioning

confidence: 99%

“…The former are usually aqueous/alcohol mixtures, with molecular sizes small enough to penetrate the zeolite porosities (see for example [15] and [16] for a review); the latter are usually silicone oil or glycerol, with molecules too large to penetrate the zeolite (see e.g. [14,[17][18][19][20][21][22][23][24]). While non-penetrating PTM are mainly used to study zeolite compressibility, Pinduced phase transitions, and amorphization, the penetrating ones can be usefully exploited for investigating the so-called pressure induced hydration (PIH) effect [25], which consists in the penetration of additional H 2 O molecules into the zeolite channels.…”

Section: Introductionmentioning

confidence: 99%

“…The interest in the confinement of water in nanoscopic spaces, like zeolitic cavities, stems from the fact that the properties of confined water are believed to be very different from those of the bulk fluid. Finally, it has been shown that the intrusion of extra-guest species into zeolite cavities also has important consequences on the overall elastic behavior of the material, since the new guest molecules generally contribute to stiffening the structure and countering P-induced deformations [18,23,24,[27][28][29].…”

Section: Introductionmentioning

confidence: 99%

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Pressure-induced water intrusion in FER-type zeolites and the influence of extraframework species on structural deformations

Arletti

Vezzalini

Quartieri

et al. 2014

Microporous and Mesoporous Materials

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The response to pressure of a natural ferrierite from Monastir (Sardinia, Italy) (Mon-FER) and of the synthetic all-silica phase (Si-FER) was investigated by means of in-situ synchrotron X-ray powder diffraction in the presence of penetrating (methanol:ethanol:water 16:3:1, m.e.w.) and non-penetrating (silicone oil, s.o.) pressure transmitting media (PTM). The following aspects are discussed: i) the penetration of extra-water molecules into the all-silica phase and the related structural aspects involving both framework and extraframework systems; ii) the influence of the zeolite composition and of the different PTM used in the compression experiments on the overall elastic parameters of the two investigated samples; iii) the elastic parameters and the unit cell P-induced deformations of the mineral phase; iv) the reversibility extents of the observed phenomena. Evidence of water penetration during compression of Si-FER in m.e.w. was found. The refinement performed at 0.2 GPa enabled location of 15 water molecules forming bulk-like and monodimensional water clusters. No methanol or ethanol penetration was observed. The results demonstrate that the free volume of the porous material is not the only parameter influencing water condensation since applied pressure is an additional fundamental factor. The bulk modulus value calculated from Pamb to 4.9 GPa for Mon-FER (K0 =44 GPa, Kp=0.2) is intermediate between the lowest (about 14 GPa) and the highest (about 72 GPa) values determined to date for zeolites compressed in non-penetrating PTM. The highest P-induced deformations are observed for Si-FER compressed in s.o. In general, higher rigidity for the natural sample was found in both media. All the reviewers requests were fulfilled: the references were corrected and the keywords were added after the abstract. UNIVERSITA' DEGLI STUDI DI TORINO Dipartimento di Scienze della TerraWe hope that now our paper will be suitable for publication. Best regard Rossella Arletti List of Revisions Highlights Penetration of 15 water molecules in synthetic Si-FER compressed in m.e.w was found. Eleven water molecules in the 10MR channels, forming bulk-like clusters. Four molecules were located in the FER cage as monodimensional clusters. Natural FER shows higher rigidity in m.e.w. and s.o. respect to the synthetic one. The presence of extraframework species in natural FER stiffens the structure. *Highlights (for review) *Graphical Abstract (for review) Pressure-induced water intrusion in FER-type zeolites and the influence of extraframework species on structural deformations AbstractThe response to pressure of a natural ferrierite from Monastir (Sardinia, Italy) (Mon-FER)and of the synthetic all-silica phase (Si-FER) was investigated by means of in-situ synchrotron Xray powder diffraction in the presence of penetrating (methanol:ethanol:water 16:3:1, m.e.w.) and non-penetrating (silicone oil, s.o.) pressure transmitting media (PTM). The following aspects are discussed: i) the penetration of extra-H 2 O molecules into t...

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Experimental Study on Energy Dissipation Characteristics of ZSM‐5 Zeolite/Water System

Sun

et al. 2013

Adv Eng Mater

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Research and development of new materials with high energy dissipation density is one of the key approaches to promote the automotive crash safety. [1,2] Conventional energy dissipation materials and structures based on metal plastic deformation, [3] buckling of cellular truss or foam, [4] damping of polymers, [5] internal friction of textile composites, [6] and phase transformation [7] are employed to achieve the energy desired dissipation goal. Most materials developed so far, however, have relatively low energy dissipation performance in terms of the unit mass/volume consideration, and most of them are not reusable. Therefore, reusable, high-density energy dissipation material candidates are in pressing need for industries.Nanomaterial is considered and proven to be a promising alternative to these traditional materials, [8][9][10][11] among which an innovative nanoporous material energy absorption system (NEAS) was recently established [12] where a nanoporous material and liquid are combined with controllable wetting properties. In essence, NEAS takes advantage of the ultralarge surface area of nanoporous material and during the liquid infiltration process, it converts the external mechanical energy into the excessive solid-liquid interfacial energy and frictional heat. The wetting characteristic, which dominates the infiltration/defiltration and flow behaviors of liquid molecules, can be adjusted via various approaches, including COMMUNICATIONInteraction with liquids at the ultra-large surface area of nanoporous material enables a high-efficiency energy dissipation system with wide perspective applications [A. Han, et al., Langmuir 2008, 24, 7044]. In this paper, a nanoporous energy dissipation system composed of a mixture of zeolite ZSM-5 and water is established and studied experimentally. Firstly, quasi-static compression experiments are carried out to analyze the pressure-volume curve and reveal the energy dissipation mechanism. Afterwards, a parametric study is conducted to explore the effects of three parameters, the pretreatment temperature of zeolite ZSM-5 (600-1100 8C), mass ratio of ZSM-5 to water (1:5-6:5), and average zeolite particle size (2.145-5.251 mm before heated or 6.104-9.557 mm after heated). Results show that in order to obtain optimum energy absorption performance, the pretreatment temperature of about 1000 8C, and higher ratio of ZSM-5 with larger particle size are desired. With high energy dissipation and reusability, the zeolite-water system with optimal parameters established herein may become an attractive cushioning device. 740 wileyonlinelibrary.com ß

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Elastic behavior of MFI-type zeolites: Compressibility of H-ZSM-5 in penetrating and non-penetrating media

Cited by 24 publications

References 35 publications

Pressure-induced penetration of guest molecules in high-silica zeolites: the case of mordenite

Pressure-induced penetration of guest molecules in high-silica zeolites: the case of mordenite

Pressure-induced water intrusion in FER-type zeolites and the influence of extraframework species on structural deformations

Experimental Study on Energy Dissipation Characteristics of ZSM‐5 Zeolite/Water System

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