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Fidler LR, Posch P, Klocker J, Hofer TS, Loerting T. The impact of alcohol and ammonium fluoride on pressure-induced amorphization of cubic structure I clathrate hydrates. J Chem Phys 2024; 160:194504. [PMID: 38757617 DOI: 10.1063/5.0203916] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2024] [Accepted: 04/28/2024] [Indexed: 05/18/2024] Open
Abstract
We have investigated pressure-induced amorphization (PIA) of an alcohol clathrate hydrate (CH) of cubic structure type I (sI) in the presence of NH4F utilizing dilatometry and x-ray powder diffraction. PIA occurs at 0.98 GPa at 77 K, which is at a much lower pressure than for other CHs of the same structure type. The amorphized CH also shows remarkable resistance against crystallization upon decompression. While amorphized sI CHs could not be recovered previously at all, this is possible in the present case. By contrast to other CHs, the recovery of the amorphized CHs to ambient pressure does not even require a high-pressure annealing step, where recovery without any loss of amorphicity is possible at 120 K and below. Furthermore, PIA is accessible upon compression at unusually high temperatures of up to 140 K, where it reaches the highest degree of amorphicity. Molecular dynamics simulations confirm that polar alcoholic guests, as opposed to non-polar guests, induce cage deformation at lower pressure. The substitution of NH4F into the host-lattice stabilizes the collapsed state more than the crystalline state, thereby enhancing the collapse kinetics and lowering the pressure of collapse.
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Affiliation(s)
- Lilli-Ruth Fidler
- Institute of Physical Chemistry, University of Innsbruck, Innrain 52c, A-6020 Innsbruck, Austria
| | - Paul Posch
- Institute of Physical Chemistry, University of Innsbruck, Innrain 52c, A-6020 Innsbruck, Austria
| | - Johannes Klocker
- Institute of General, Inorganic and Theoretical Chemistry, University of Innsbruck, Innrain 80, A-6020 Innsbruck, Austria
| | - Thomas S Hofer
- Institute of General, Inorganic and Theoretical Chemistry, University of Innsbruck, Innrain 80, A-6020 Innsbruck, Austria
| | - Thomas Loerting
- Institute of Physical Chemistry, University of Innsbruck, Innrain 52c, A-6020 Innsbruck, Austria
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2
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Cao P, Wu J, Ning F. Mechanical properties of amorphous CO 2 hydrates: insights from molecular simulations. Phys Chem Chem Phys 2024; 26:9388-9398. [PMID: 38444360 DOI: 10.1039/d4cp00203b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/07/2024]
Abstract
Understanding physicochemical properties of amorphous gas hydrate systems is of great significance to reveal structural stabilities of polycrystalline gas hydrate systems. Furthermore, amorphous gas hydrates can occur ordinarily in the nucleation events of gas hydrate systems. Herein, the mechanical properties of amorphous carbon dioxide hydrates are examined by means of all-atom classical molecular dynamic simulations. Our molecular simulation results reveal that mechanical strengths of amorphous carbon dioxide hydrates are evidently governed by temperatures, confining pressures, and ratios of water to carbon dioxide molecules. Notably, under compressive loads, amorphous carbon dioxide hydrates firstly exhibit monotonic strain hardening, followed by an interesting distinct phenomenon characterized by a steady flow stress at further large deformation strains. Furthermore, structural evolutions of amorphous carbon dioxide hydrates are analyzed on the basis of the N-Hbond DOP order parameter. These important findings can not only contribute to our understanding of the structural stabilities of amorphous gas hydrate systems, but also help to develop fundamental understandings about grain boundaries of gas hydrate systems.
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Affiliation(s)
- Pinqiang Cao
- School of Resource and Environmental Engineering, Wuhan University of Science and Technology, Wuhan, Hubei 430081, China.
| | - Jianyang Wu
- Department of Physics, Research Institute for Biomimetics and Soft Matter, Fujian Provincial Key Laboratory for Soft Functional Materials Research, Xiamen University, Xiamen 361005, China.
| | - Fulong Ning
- Faculty of Engineering, China University of Geosciences, Wuhan, Hubei 430074, China.
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3
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Brant Carvalho PHB, Moraes PIR, Leitão AA, Andersson O, Tulk CA, Molaison J, Lyubartsev AP, Häussermann U. Structural investigation of three distinct amorphous forms of Ar hydrate. RSC Adv 2021; 11:30744-30754. [PMID: 35479871 PMCID: PMC9041099 DOI: 10.1039/d1ra05697b] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Accepted: 09/03/2021] [Indexed: 11/21/2022] Open
Abstract
Three amorphous forms of Ar hydrate were produced using the crystalline clathrate hydrate Ar·6.5H2O (structure II, Fd3̄m, a ≈ 17.1 Å) as a precursor and structurally characterized by a combination of isotope substitution (36Ar) neutron diffraction and molecular dynamics (MD) simulations. The first form followed from the pressure-induced amorphization of the precursor at 1.5 GPa at 95 K and the second from isobaric annealing at 2 GPa and subsequent cooling back to 95 K. In analogy to amorphous ice, these amorphs are termed high-density amorphous (HDA) and very-high-density amorphous (VHDA), respectively. The third amorph (recovered amorphous, RA) was obtained when recovering VHDA to ambient pressure (at 95 K). The three amorphs have distinctly different structures. In HDA the distinction of the original two crystallographically different Ar guests is maintained as differently dense Ar–water hydration structures, which expresses itself in a split first diffraction peak in the neutron structure factor function. Relaxation of the local water structure during annealing produces a homogeneous hydration environment around Ar, which is accompanied with a densification by about 3%. Upon pressure release the homogeneous amorphous structure undergoes expansion by about 21%. Both VHDA and RA can be considered frozen solutions of immiscible Ar and water in which in average 15 and 11 water molecules, respectively, coordinate Ar out to 4 Å. The local water structures of HDA and VHDA Ar hydrates show some analogy to those of the corresponding amorphous ices, featuring H2O molecules in 5- and 6-fold coordination with neighboring molecules. However, they are considerably less dense. Most similarity is seen between RA and low density amorphous ice (LDA), which both feature strictly 4-coordinated H2O networks. It is inferred that, depending on the kind of clathrate structure and occupancy of cages, amorphous states produced from clathrate hydrates display variable local water structures. Three amorphous forms of Ar clathrate hydrate (pressure-amorphized, annealed and recovered) were characterized by isotope substitution (36Ar) neutron diffraction and molecular dynamics and their local coordinations analyzed and compared to pure ice.![]()
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Affiliation(s)
- Paulo H B Brant Carvalho
- Department of Materials and Environmental Chemistry, Stockholm University SE-10691 Stockholm Sweden
| | - Pedro Ivo R Moraes
- Department of Chemistry, Federal University of Juiz de Fora Juiz de Fora MG 36036-900 Brazil
| | - Alexandre A Leitão
- Department of Chemistry, Federal University of Juiz de Fora Juiz de Fora MG 36036-900 Brazil
| | - Ove Andersson
- Department of Physics, Umeå University Umeå SE-90187 Sweden
| | - Chris A Tulk
- Neutron Scattering Division, Oak Ridge National Laboratory Oak Ridge Tennessee 37831 USA
| | - Jamie Molaison
- Neutron Scattering Division, Oak Ridge National Laboratory Oak Ridge Tennessee 37831 USA
| | - Alexander P Lyubartsev
- Department of Materials and Environmental Chemistry, Stockholm University SE-10691 Stockholm Sweden
| | - Ulrich Häussermann
- Department of Materials and Environmental Chemistry, Stockholm University SE-10691 Stockholm Sweden
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4
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Suzuki Y, Takeya S. Slow Crystal Growth of Cubic Ice with Stacking Faults in a Glassy Dilute Glycerol Aqueous Solution. J Phys Chem Lett 2020; 11:9432-9438. [PMID: 33108207 DOI: 10.1021/acs.jpclett.0c02716] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Control of ice formation is an important issue as catastrophic ice growth influences our life activities and many industrial systems. We prepared a homogeneous glass of a dilute glycerol aqueous solution by a pressure liquid cooling vitrification method and examined the effect of solute on the ice formation of solvent water using a powder X-ray diffraction method. The solvent water immediately after the crystallization is composed of nanosized pure cubic ice (ice Ic). The crystal growth of ice Ic with stacking faults is much slower than that of pure water. The presence of glycerol molecules dispersing homogeneously may hinder crystal growth. The macroscopic segregation occurs rapidly during the transformation from stacking disordered ice to hexagonal ice. The results suggest that ice formation can be controlled by changing the solute type and concentration. This study has implications for thawing technology in cryobiology and frozen food engineering.
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Affiliation(s)
- Yoshiharu Suzuki
- Research Center for Advanced Measurement and Characterization, National Institute for Materials Science (NIMS), Namiki 1-1, Tsukuba, Ibaraki 305-0044, Japan
| | - Satoshi Takeya
- Research Institute for Material and Chemical Measurement, National Institute of Advanced Industrial Science and Technology (AIST), Central 5, Higashi 1-1-1, Tsukuba, Ibaraki 305-8565, Japan
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Andersson O, Brant Carvalho PHB, Hsu YJ, Häussermann U. Transitions in pressure-amorphized clathrate hydrates akin to those of amorphous ices. J Chem Phys 2019; 151:014502. [DOI: 10.1063/1.5096981] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Ove Andersson
- Department of Physics, Umeå University, 901 87 Umeå, Sweden
| | | | - Ying-Jui Hsu
- Department of Physics, Umeå University, 901 87 Umeå, Sweden
| | - Ulrich Häussermann
- Department of Materials and Environmental Chemistry, Stockholm University, 106 91 Stockholm, Sweden
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6
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Brant Carvalho PHB, Mace A, Bull CL, Funnell NP, Tulk CA, Andersson O, Häussermann U. Elucidation of the pressure induced amorphization of tetrahydrofuran clathrate hydrate. J Chem Phys 2019; 150:204506. [PMID: 31153163 DOI: 10.1063/1.5083958] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The type II clathrate hydrate (CH) THF·17 H2O (THF = tetrahydrofuran) is known to amorphize on pressurization to ∼1.3 GPa in the temperature range 77-140 K. This seems to be related to the pressure induced amorphization (PIA) of hexagonal ice to high density amorphous (HDA) ice. Here, we probe the PIA of THF-d8 · 17 D2O (TDF-CD) at 130 K by in situ thermal conductivity and neutron diffraction experiments. Both methods reveal amorphization of TDF-CD between 1.1 and 1.2 GPa and densification of the amorphous state on subsequent heating from 130 to 170 K. The densification is similar to the transition of HDA to very-high-density-amorphous ice. The first diffraction peak (FDP) of the neutron structure factor function, S(Q), of amorphous TDF-CD at 130 K appeared split. This feature is considered a general phenomenon of the crystalline to amorphous transition of CHs and reflects different length scales for D-D and D-O correlations in the water network and the cavity structure around the guest. The maximum corresponding to water-water correlations relates to the position of the FDP of HDA ice at ∼1 GPa. Upon annealing, the different length scales for water-water and water-guest correlations equalize and the FDP in the S(Q) of the annealed amorph represents a single peak. The similarity of local water structures in amorphous CHs and amorphous ices at in situ conditions is confirmed from molecular dynamics simulations. In addition, these simulations show that THF guest molecules are immobilized and retain long-range correlations as in the crystal.
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Affiliation(s)
- Paulo H B Brant Carvalho
- Department of Materials and Environmental Chemistry, Stockholm University, SE-10691 Stockholm, Sweden
| | - Amber Mace
- Department of Materials and Environmental Chemistry, Stockholm University, SE-10691 Stockholm, Sweden
| | - Craig L Bull
- STFC ISIS Facility, Rutherford Appleton Laboratory, Harwell OX11 0QX, United Kingdom
| | - Nicholas P Funnell
- STFC ISIS Facility, Rutherford Appleton Laboratory, Harwell OX11 0QX, United Kingdom
| | - Chris A Tulk
- Chemical and Engineering Materials Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - Ove Andersson
- Department of Physics, Umeå University, SE-901 87 Umeå, Sweden
| | - Ulrich Häussermann
- Department of Materials and Environmental Chemistry, Stockholm University, SE-10691 Stockholm, Sweden
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7
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Andersson O, Häussermann U. A Second Glass Transition in Pressure Collapsed Type II Clathrate Hydrates. J Phys Chem B 2018; 122:4376-4384. [DOI: 10.1021/acs.jpcb.8b01269] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ove Andersson
- Department of Physics, Umeå University, 901 87 Umeå, Sweden
| | - Ulrich Häussermann
- Department of Materials and Environmental Chemistry, Stockholm University,106 91 Stockholm, Sweden
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8
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Andersson O, Nakazawa Y. Transitions in Pressure Collapsed Clathrate Hydrates. J Phys Chem B 2015; 119:3846-53. [DOI: 10.1021/jp511442r] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Ove Andersson
- Department
of Physics, Umeå University, 901 87 Umeå, Sweden
| | - Yasuhiro Nakazawa
- Research
Center for Structural Thermodynamics, Graduate School of Science, Osaka University, Toyonaka, Osaka, 560-0043, Japan
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9
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Liang S, Kusalik PG. Nucleation of gas hydrates within constant energy systems. J Phys Chem B 2013; 117:1403-10. [PMID: 23330680 DOI: 10.1021/jp308395x] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The early stage of formation of gas hydrates has recently attracted attention as amorphous intermediate gas hydrate structures have been observed, apparently contrary to a classical model of nucleation and some experimental observations. To date, essentially all reported molecular simulations of the nucleation of gas hydrates have been under constant temperature conditions, which does not consider the possible impacts of heat transfer on the nucleation processes. Here we show, using constant energy molecular simulations, that the nuclei at an early stage of the hydrate formation have relatively more crystalline order in comparison with those observed in previous isothermal (NPT or NVT) work. The current work suggests a more transient role for intermediate amorphous structures during hydrate nucleation, thereby providing a stronger link between molecular simulation and experimental observations. Our NVE results nevertheless support the two-step nucleation mechanism proposed in previous simulation studies under constant temperature conditions which features the initial formation of amorphous hydrate-like structures.
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Affiliation(s)
- Shuai Liang
- Department of Chemistry, University of Calgary, 2500 University Drive NW, Calgary, Alberta, Canada T2N 1N4
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10
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Tse JS, Klug DD. Pressure amorphized ices – an atomistic perspective. Phys Chem Chem Phys 2012; 14:8255-63. [DOI: 10.1039/c2cp40201g] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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11
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Liang S, Rozmanov D, Kusalik PG. Crystal growth simulations of methane hydrates in the presence of silica surfaces. Phys Chem Chem Phys 2011; 13:19856-64. [DOI: 10.1039/c1cp21810g] [Citation(s) in RCA: 87] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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12
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Mitterdorfer C, Bauer M, Loerting T. Clathrate hydrate formation after CO2–H2O vapour deposition. Phys Chem Chem Phys 2011; 13:19765-72. [DOI: 10.1039/c1cp21856e] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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