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Andersson O, Saiduzzaman M, Brant Carvalho PHB, Häussermann U. Amorphous-like thermal conductivity and high mechanical stability of cyclopentane clathrate hydrate. Phys Chem Chem Phys 2024; 26:16017-16025. [PMID: 38775259 DOI: 10.1039/d4cp01656d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2024]
Abstract
The thermal conductivity κ of cyclopentane clathrate hydrate (CP CH) of type II was measured at temperatures down to 100 K and at pressures up to 1.3 GPa. The results show that CP CH displays amorphous-like κ characteristic of many crystalline clathrate hydrates, e.g., tetrahydrofuran (THF) CH. The magnitude of κ is 0.47 W m-1 K-1 near the melting point of 280 K at atmospheric pressure, and it is almost independent of pressure and temperature T: ln κ = -0.621-40.1/T at atmospheric pressure (in SI-units). This is slightly less than κ of type II CHs of water-miscible solvents such as THF. Intriguingly, unlike other water-rich type II clathrate hydrates of water-miscible molecules M (M·17 H2O), CP CH does not amorphize at pressures up to 1.3 GPa at 130 K and also remains stable up to 0.5 GPa at 240 K. This shows that CP CH is mechanically more stable than the previously studied water-rich type II CHs, and suggests that repulsive forces between CP and the H2O cages increase the mechanical stability of crystalline CP CH. Moreover, we show that κ of an ice-CH mixture, which often arises for CHs that form naturally, is described by the average of the parallel and series heat conduction models to within 5% for ice contents up to 22 wt%. The findings provide a better understanding of the thermal and stability properties of clathrate hydrates for their applications such as gas storage compounds.
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Affiliation(s)
- Ove Andersson
- Department of Physics, Umeå University, 901 87 Umeå, Sweden.
| | - Md Saiduzzaman
- 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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2
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Yin X, Yan Y, Zhang X, Bao B, Pi P, Zhou Y, Wen X, Jiang L. Designing Robust Superhydrophobic Materials for Inhibiting Nucleation of Clathrate Hydrates by Imitating Glass Sponges. ACS CENTRAL SCIENCE 2023; 9:318-327. [PMID: 36844482 PMCID: PMC9951277 DOI: 10.1021/acscentsci.2c01406] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/26/2022] [Indexed: 06/18/2023]
Abstract
Superhydrophobic surfaces are suggested to deal with hydrate blockage because they can greatly reduce adhesion with the formed hydrates. However, they may promote the formation of fresh hydrate nuclei by inducing an orderly arrangement of water molecules, further aggravating hydrate blockage and meanwhile suffering from their fragile surfaces. Here, inspired by glass sponges, we report a robust anti-hydrate-nucleation superhydrophobic three-dimensional (3D) porous skeleton, perfectly resolving the conflict between inhibiting hydrate nucleation and superhydrophobicity. The high specific area of the 3D porous skeleton ensures an increase in terminal hydroxyl (inhibitory groups) content without damaging the superhydrophobicity, achieving the inhibition to fresh hydrates and antiadhesion to formed hydrates. Molecular dynamics simulation results indicate that terminal hydroxyls on a superhydrophobic surface can inhibit the formation of hydrate cages by disordering the arrangement of water molecules. And experimental data prove that the induction time of hydrate formation was prolonged by 84.4% and the hydrate adhesive force was reduced by 98.7%. Furthermore, this porous skeleton still maintains excellent inhibition and antiadhesion properties even after erosion for 4 h at 1500 rpm. Therefore, this research paves the way toward developing novel materials applied in the oil and gas industry, carbon capture and storage, etc.
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Affiliation(s)
- Xinyu Yin
- School
of Chemical and Chemical Engineering, Guangdong Engineering Technology
Research Center of Advanced Insulating Coating, South China University of Technology, Guangzhou 510640, People’s Republic of China
| | - Yuanyang Yan
- School
of Chemical and Chemical Engineering, Guangdong Engineering Technology
Research Center of Advanced Insulating Coating, South China University of Technology, Guangzhou 510640, People’s Republic of China
| | - Xiangning Zhang
- School
of Chemical and Chemical Engineering, Guangdong Engineering Technology
Research Center of Advanced Insulating Coating, South China University of Technology, Guangzhou 510640, People’s Republic of China
| | - Bin Bao
- CAS
Key Laboratory of Bio-inspired Materials and Interfacial Science,
Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China
| | - Pihui Pi
- School
of Chemical and Chemical Engineering, Guangdong Engineering Technology
Research Center of Advanced Insulating Coating, South China University of Technology, Guangzhou 510640, People’s Republic of China
| | - Yahong Zhou
- CAS
Key Laboratory of Bio-inspired Materials and Interfacial Science,
Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China
| | - Xiufang Wen
- School
of Chemical and Chemical Engineering, Guangdong Engineering Technology
Research Center of Advanced Insulating Coating, South China University of Technology, Guangzhou 510640, People’s Republic of China
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3
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McElligott A, Guerra A, Denoncourt A, Rey AD, Servio P. Interfacial Effects during Phase Change in Multiple Levitated Tetrahydrofuran Hydrate Droplets. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:1573-1584. [PMID: 36662650 DOI: 10.1021/acs.langmuir.2c03024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Recent strategies developed to examine the nucleation of crystal structures like tetrahydrofuran (THF) hydrates without the effects of a solid interface have included acoustic levitation, where only a liquid-gas interface initially exists. However, the ability now exists to levitate and freeze multiple droplets simultaneously, which could reveal interdroplet effects and provide further insight into interfacial nucleation phenomena. In this study, using direct digital and infrared imaging techniques, the freezing of up to three simultaneous THF hydrate droplets was investigated for the first time. Nucleation was initiated at the aqueous solution-air interface. Two pseudo-heterogeneous mechanisms created additional nucleation interfaces: one from cavitation effects entraining microbubbles and another from subvisible ice particles, also called hydrate-nucleating particles (HNPs), impacting the droplet surface. For systems containing droplets in both the second and third positions, nucleation was statistically simultaneous between all droplets. This effect may have been caused by the high liquid-solid interfacial pressures that developed at nucleation, causing some cracking in the initial hydrate shell around the droplet and releasing additional HNPs (now of hydrate) into the air. During crystallization, the THF hydrate droplets developed a completely white opacity, termed optical clarity loss (OCL). It was suggested that high hydrate growth rates within the droplet resulted in the capture of tiny air bubbles within the solid phase. In turn, light refraction through many smaller bubbles resulted in the OCL. These bubbles created structural inhomogeneities, which may explain how the volumetric expansion of the droplets upon complete solidification was 23.6% compared with 7.4% in pure, stationary THF hydrate systems. Finally, the thermal gradient that developed between the top and bottom of the droplet during melting resulted in a surface tension gradient along the air-liquid interface. In turn, convective cells developed within the droplet, causing it to spin rapidly about the horizontal axis.
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Affiliation(s)
- Adam McElligott
- Department of Chemical Engineering, McGill University, Montreal, Quebec H3A 0C5, Canada
| | - André Guerra
- Department of Chemical Engineering, McGill University, Montreal, Quebec H3A 0C5, Canada
| | - Alexia Denoncourt
- Department of Chemical Engineering, McGill University, Montreal, Quebec H3A 0C5, Canada
| | - Alejandro D Rey
- Department of Chemical Engineering, McGill University, Montreal, Quebec H3A 0C5, Canada
| | - Phillip Servio
- Department of Chemical Engineering, McGill University, Montreal, Quebec H3A 0C5, Canada
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4
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Wang L, Hall K, Zhang Z, Kusalik PG. Mixed Hydrate Nucleation: Molecular Mechanisms and Cage Structures. J Phys Chem B 2022; 126:7015-7026. [PMID: 36047925 DOI: 10.1021/acs.jpcb.2c03223] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The molecular-level details of the formation of mixed gas hydrates remain elusive despite their significance for a variety of scientific and industrial applications. In this study, extensive molecular simulations have been performed to examine the behavior of CH4/H2S mixed hydrate nucleation utilizing two different simulation setups varying in compositions and temperatures. The observed behavior exhibits similar phenomenology across the various systems once differences in nucleation rates and guest uptake are accounted for. We find that CH4 is always enriched in the hydrate phase while the aqueous phase is enriched in H2S. Even with H2S as a minor component (i.e., 10% mole fraction), the system can mirror the overall nucleation kinetics of pure H2S hydrate systems with CH4-dominant nuclei. Through analyses of cages and their transitions, nonstandard cages, particularly those with 12 faces (e.g., 51062), have been found to be key intermediate cage types in the early stage of nucleation. Additionally, we present previously unreported cage types comprising heptagonal faces (e.g., 596271) as having a significant role in the early-stage gas hydrate structural transitions.
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Affiliation(s)
- Lei Wang
- Department of Chemistry, University of Calgary, 2500 University Drive NW, Calgary, T2N 1N4 Alberta, Canada
| | - Kyle Hall
- Department of Chemistry, University of Calgary, 2500 University Drive NW, Calgary, T2N 1N4 Alberta, Canada
| | - Zhengcai Zhang
- Laboratory for Marine Mineral Resources, Pilot National Laboratory for Marine Science and Technology, Qingdao 266071, China
| | - Peter G Kusalik
- Department of Chemistry, University of Calgary, 2500 University Drive NW, Calgary, T2N 1N4 Alberta, Canada
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Jing X, Luo Q, Cui X, Wang Q, Liu Y, Fu Z. Molecular Dynamics Simulation of CO2 Hydrate Growth in Salt Water. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120237] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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6
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Lu Y, Lv X, Li Q, Yang L, Zhang L, Zhao J, Song Y. Molecular behavior of hybrid gas hydrate nucleation: separation of soluble H 2S from mixed gas. Phys Chem Chem Phys 2022; 24:9509-9520. [PMID: 35388810 DOI: 10.1039/d1cp05302g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Soluble H2S widely exists in natural gas or oil potentially corroding oil/gas pipelines. Furthermore, it can affect the hydrate formation condition, resulting in pipeline blockage; the nucleation mechanism from mixed gas including H2S is still largely unclear. Molecular dynamics simulations were performed to reveal the effects of different initial mixed H2S/CH4 compositions on the hydrate nucleation and growth process. The geometric details of the nanobubbles and gas composition in the nanobubbles were analyzed; the size of the nanobubbles was found to decrease from 3.4 nm to 1.4 nm. With the increase in the initial H2S proportion, the diameter of the nanobubbles decreased; more guest molecules were dissolved in the water, which improved the initial concentration of guest molecules in the water. A multi-site nucleation process was observed, and separate hydrate clusters could grow independently until the simulation box limited their growth due to high local H2S concentration as a potential nucleation location. When the initial proportion of mixed gas approaches, H2S preferred to occupy and stabilize the incipient cage. Moreover, 512, 4151062, and 51262 cages accounted for approximately 95% of the first hydrate cage. Nucleation rates were shown to increase from 4.62 × 1024 to 9.438 × 1026 nuclei cm-3 s-1. The present high subcooling and H2S concentration provided a high driving force to promote mixed hydrate nucleation and growth. The proportion of cages occupied by H2S increased with increasing initial H2S proportion, but the largest enrichment factor of 1.38 occurred at 10% initial H2S/CH4 mixed gas.
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Affiliation(s)
- Yi Lu
- Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, Dalian University of Technology, Dalian, 116024, China.
| | - Xin Lv
- State Key Laboratory of Natural Gas Hydrate, Beijing, 100028, China
| | - Qingping Li
- State Key Laboratory of Natural Gas Hydrate, Beijing, 100028, China
| | - Lei Yang
- Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, Dalian University of Technology, Dalian, 116024, China.
| | - Lunxiang Zhang
- Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, Dalian University of Technology, Dalian, 116024, China.
| | - Jiafei Zhao
- Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, Dalian University of Technology, Dalian, 116024, China.
| | - Yongchen Song
- Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, Dalian University of Technology, Dalian, 116024, China.
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Kang DW, Lee W, Ahn YH, Lee JW. Exploring tuning phenomena of THF-H2 hydrates via molecular dynamics simulations. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.118490] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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8
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Goswami A, Singh JK. A general topological network criterion for exploring the structure of icy nanoribbons and monolayers. Phys Chem Chem Phys 2020; 22:3800-3808. [DOI: 10.1039/c9cp04902a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We develop intuitive metrics for quantifying complex nucleating systems under confinement.
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Affiliation(s)
- Amrita Goswami
- Department of Chemical Engineering
- Indian Institute of Technology Kanpur
- India
| | - Jayant K. Singh
- Department of Chemical Engineering
- Indian Institute of Technology Kanpur
- India
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9
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Mirzaeifard S, Servio P, Rey AD. Characterization of nucleation of methane hydrate crystals: Interfacial theory and molecular simulation. J Colloid Interface Sci 2019; 557:556-567. [DOI: 10.1016/j.jcis.2019.09.056] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2019] [Revised: 09/06/2019] [Accepted: 09/17/2019] [Indexed: 01/18/2023]
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10
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Synthesis of Methane Hydrate from Ice Powder Accelerated by Doping Ethanol into Methane Gas. Sci Rep 2019; 9:12345. [PMID: 31451712 PMCID: PMC6710250 DOI: 10.1038/s41598-019-48832-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2019] [Accepted: 08/13/2019] [Indexed: 11/15/2022] Open
Abstract
Clathrate hydrate is considered to be a potential medium for gas storage and transportation. Slow kinetics of hydrate formation is a hindrance to the commercialized process development of such applications. The kinetics of methane hydrate formation from the reaction of ice powder and methane gas doped with/without saturated ethanol vapor at constant pressure of 16.55 ± 0.20 MPa and constant temperature ranging from −15 to −1.0 °C were investigated. The methane hydrate formation can be dramatically accelerated by simply doping ethanol into methane gas with ultralow ethanol concentration (<94 ppm by mole fraction) in the gas phase. For ethanol-doped system 80.1% of ice powder were converted into methane hydrate after a reaction time of 4 h, while only 26.6% of ice powder was converted into methane hydrate after a reaction time of 24 h when pure methane gas was used. Furthermore, this trace amount of ethanol could also substantially suppress the self-preservation effect to enhance the dissociation rate of methane hydrate (operated at 1 atm and temperatures below the ice melting point). In other words, a trace amount of ethanol doped in methane gas can act as a kinetic promoter for both the methane hydrate formation and dissociation.
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11
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Yan K, Li X, Chen Z, Zhang Y, Xu C, Xia Z. Methane hydrate formation and dissociation behaviors in montmorillonite. Chin J Chem Eng 2019. [DOI: 10.1016/j.cjche.2018.11.025] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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12
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Hall KW, Percec S, Klein ML. Polymer nucleation under high-driving force, long-chain conditions: Heat release and the separation of time scales. J Chem Phys 2019; 150:114901. [PMID: 30902014 DOI: 10.1063/1.5084773] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
This study reveals important features of polymer crystal formation at high-driving forces in entangled polymer melts based on simulations of polyethylene. First and in contrast to small-molecule crystallization, the heat released during polymer crystallization does not appreciably influence structural details of early-stage, crystalline clusters (crystal nuclei). Second, early-stage polymer crystallization (crystal nucleation) can occur without substantial chain-level relaxation and conformational changes. This study's results indicate that local structures and environments guide crystal nucleation in entangled polymer melts under high-driving force conditions. Given that such conditions are often used to process polyethylene, local structures and the separation of time scales associated with crystallization and chain-level processes are anticipated to be of substantial importance to processing strategies. This study highlights new research directions for understanding polymer crystallization.
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Affiliation(s)
- Kyle Wm Hall
- Department of Chemistry, Temple University, Philadelphia, Pennsylvania 19122, USA
| | - Simona Percec
- Department of Chemistry, Temple University, Philadelphia, Pennsylvania 19122, USA
| | - Michael L Klein
- Department of Chemistry, Temple University, Philadelphia, Pennsylvania 19122, USA
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13
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Khuu T, Anick D, Shultz MJ. Matrix Isolation Spectroscopy: Aqueous p-Toluenesulfonic Acid Solvation. J Phys Chem A 2018; 122:762-772. [PMID: 29292995 DOI: 10.1021/acs.jpca.7b08939] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Interaction between p-toluenesulfonic acid (pTSA) and water is studied at -20 °C in a CCl4 matrix. In CCl4 water exists as monomers with restricted rotational motion about its symmetry axis. Additionally, CCl4 is transparent in the hydrogen-bonded region; CCl4 thus constitutes an excellent ambient thermal energy matrix isolation medium for diagnosing interactions with water. Introducing pTSA-nH2O gives rise to two narrow resonances at 3642 cm-1 and at 2835 cm-1 plus a broad 3000-3550 cm-1 absorption. In addition, negative monomer symmetric and asymmetric stretch features relative to nominally dry CCl4 indicate that fewer water monomers exist in the cooled (-20 °C) acid solution than in room-temperature anhydrous CCl4. The negative peaks along with the broad absorption band indicate that water monomers are incorporated into clusters. The 3642 cm-1 resonance is assigned to the OH-π interaction with a cluster containing many water molecules per acid molecule. The 2835 cm-1 resonance is assigned to the (S-)O-H stretch of pTSA-dihydrate. The coexistence of these two species provides insights into interactions in this acid-water CCl4 system.
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Affiliation(s)
- Thien Khuu
- Laboratory for Aqueous and Surface Studies, Tufts University , Pearson Building, Medford, Massachusetts 02155, United States
| | - David Anick
- Laboratory for Aqueous and Surface Studies, Tufts University , Pearson Building, Medford, Massachusetts 02155, United States
| | - Mary Jane Shultz
- Laboratory for Aqueous and Surface Studies, Tufts University , Pearson Building, Medford, Massachusetts 02155, United States
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