51
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Lu J, Jacobson LC, Perez Sirkin YA, Molinero V. High-Resolution Coarse-Grained Model of Hydrated Anion-Exchange Membranes that Accounts for Hydrophobic and Ionic Interactions through Short-Ranged Potentials. J Chem Theory Comput 2016; 13:245-264. [PMID: 28068769 DOI: 10.1021/acs.jctc.6b00874] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Jibao Lu
- Department
of Chemistry, The University of Utah, Salt Lake City, Utah 84112-0850, United States
| | - Liam C. Jacobson
- Department
of Chemistry, The University of Utah, Salt Lake City, Utah 84112-0850, United States
| | - Yamila A. Perez Sirkin
- Departamento
de Química Inorgánica, Analítica y Química
Física, and INQUIMAE, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires C1428EHA, Argentina
| | - Valeria Molinero
- Department
of Chemistry, The University of Utah, Salt Lake City, Utah 84112-0850, United States
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52
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Sosso G, Chen J, Cox SJ, Fitzner M, Pedevilla P, Zen A, Michaelides A. Crystal Nucleation in Liquids: Open Questions and Future Challenges in Molecular Dynamics Simulations. Chem Rev 2016; 116:7078-116. [PMID: 27228560 PMCID: PMC4919765 DOI: 10.1021/acs.chemrev.5b00744] [Citation(s) in RCA: 390] [Impact Index Per Article: 48.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Indexed: 11/28/2022]
Abstract
The nucleation of crystals in liquids is one of nature's most ubiquitous phenomena, playing an important role in areas such as climate change and the production of drugs. As the early stages of nucleation involve exceedingly small time and length scales, atomistic computer simulations can provide unique insights into the microscopic aspects of crystallization. In this review, we take stock of the numerous molecular dynamics simulations that, in the past few decades, have unraveled crucial aspects of crystal nucleation in liquids. We put into context the theoretical framework of classical nucleation theory and the state-of-the-art computational methods by reviewing simulations of such processes as ice nucleation and the crystallization of molecules in solutions. We shall see that molecular dynamics simulations have provided key insights into diverse nucleation scenarios, ranging from colloidal particles to natural gas hydrates, and that, as a result, the general applicability of classical nucleation theory has been repeatedly called into question. We have attempted to identify the most pressing open questions in the field. We believe that, by improving (i) existing interatomic potentials and (ii) currently available enhanced sampling methods, the community can move toward accurate investigations of realistic systems of practical interest, thus bringing simulations a step closer to experiments.
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Affiliation(s)
- Gabriele
C. Sosso
- Thomas Young Centre, London
Centre for Nanotechnology and Department of Physics and Astronomy, University College London, Gower Street WC1E
6BT London, U.K.
| | - Ji Chen
- Thomas Young Centre, London
Centre for Nanotechnology and Department of Physics and Astronomy, University College London, Gower Street WC1E
6BT London, U.K.
| | | | - Martin Fitzner
- Thomas Young Centre, London
Centre for Nanotechnology and Department of Physics and Astronomy, University College London, Gower Street WC1E
6BT London, U.K.
| | - Philipp Pedevilla
- Thomas Young Centre, London
Centre for Nanotechnology and Department of Physics and Astronomy, University College London, Gower Street WC1E
6BT London, U.K.
| | - Andrea Zen
- Thomas Young Centre, London
Centre for Nanotechnology and Department of Physics and Astronomy, University College London, Gower Street WC1E
6BT London, U.K.
| | - Angelos Michaelides
- Thomas Young Centre, London
Centre for Nanotechnology and Department of Physics and Astronomy, University College London, Gower Street WC1E
6BT London, U.K.
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53
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Lu J, Chakravarty C, Molinero V. Relationship between the line of density anomaly and the lines of melting, crystallization, cavitation, and liquid spinodal in coarse-grained water models. J Chem Phys 2016; 144:234507. [DOI: 10.1063/1.4953854] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Jibao Lu
- Department of Chemistry, The University of Utah, Salt Lake City, Utah 84112-0850, USA
| | | | - Valeria Molinero
- Department of Chemistry, The University of Utah, Salt Lake City, Utah 84112-0850, USA
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54
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Chakrabarty S, Williams ER. The effect of halide and iodate anions on the hydrogen-bonding network of water in aqueous nanodrops. Phys Chem Chem Phys 2016; 18:25483-25490. [DOI: 10.1039/c6cp05033f] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The hydration of halide and iodate anions was investigated using electrospray ionization (ESI) mass spectrometry and infrared photodissociation (IRPD) spectroscopy.
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55
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Zaragoza A, Conde MM, Espinosa JR, Valeriani C, Vega C, Sanz E. Competition between ices Ih and Ic in homogeneous water freezing. J Chem Phys 2015; 143:134504. [DOI: 10.1063/1.4931987] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Affiliation(s)
- Alberto Zaragoza
- Departamento de Quimica Fisica I, Facultad de Ciencias Quimicas, Universidad Complutense de Madrid, 28040 Madrid, Spain
| | - Maria M. Conde
- Departamento de Quimica Fisica I, Facultad de Ciencias Quimicas, Universidad Complutense de Madrid, 28040 Madrid, Spain
- Laboratoire des Fluides Complexes et leurs Réservoirs, UMR 5150, Université de Pau et des Pays de l’Adour, B. P. 1155, Pau-Cedex 64013, France
| | - Jorge R. Espinosa
- Departamento de Quimica Fisica I, Facultad de Ciencias Quimicas, Universidad Complutense de Madrid, 28040 Madrid, Spain
| | - Chantal Valeriani
- Departamento de Quimica Fisica I, Facultad de Ciencias Quimicas, Universidad Complutense de Madrid, 28040 Madrid, Spain
- Departamento de Fisica Aplicada I, Facultad de Ciencias Fisicas, Universidad Complutense de Madrid, 28040 Madrid, Spain
| | - Carlos Vega
- Departamento de Quimica Fisica I, Facultad de Ciencias Quimicas, Universidad Complutense de Madrid, 28040 Madrid, Spain
| | - Eduardo Sanz
- Departamento de Quimica Fisica I, Facultad de Ciencias Quimicas, Universidad Complutense de Madrid, 28040 Madrid, Spain
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56
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Yagasaki T, Matsumoto M, Tanaka H. Adsorption Mechanism of Inhibitor and Guest Molecules on the Surface of Gas Hydrates. J Am Chem Soc 2015; 137:12079-85. [DOI: 10.1021/jacs.5b07417] [Citation(s) in RCA: 104] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Takuma Yagasaki
- Department
of Chemistry, Faculty of Science, Okayama University, Okayama, 700-8530, Japan
| | - Masakazu Matsumoto
- Department
of Chemistry, Faculty of Science, Okayama University, Okayama, 700-8530, Japan
| | - Hideki Tanaka
- Department
of Chemistry, Faculty of Science, Okayama University, Okayama, 700-8530, Japan
- Research Center of New Functional Materials for Energy Production, Storage and Transport, Okayama, 700-8530, Japan
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57
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Abstract
Understanding the nucleation and crystal growth of gas hydrates near mineral surfaces and in confinement are critical to the methane recovery from gas hydrate reservoirs. In this work, through molecular dynamics simulation studies, we present an exploration of the nucleation behavior of methane hydrates near model hydroxylated silica surfaces. Our simulation results indicate that the nucleation of methane hydrates can initiate from the silica surfaces despite of the structural mismatch of the two solid phases. A layer of intermediate half-cage structures was observed between the gas hydrate and silica surfaces, apparently helping to minimize the free energy penalty. These results have important implications to our understanding of the effects of solid surfaces on hydrate nucleation processes.
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Affiliation(s)
- Shuai Liang
- Key Laboratory of Gas Hydrate, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou, China
| | - Peter G. Kusalik
- Department of Chemistry, University of Calgary, Calgary, Alberta, Canada
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58
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Lauricella M, Meloni S, Liang S, English NJ, Kusalik PG, Ciccotti G. Clathrate structure-type recognition: Application to hydrate nucleation and crystallisation. J Chem Phys 2015; 142:244503. [DOI: 10.1063/1.4922696] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Affiliation(s)
- Marco Lauricella
- School of Physics, University College Dublin, Belfield, Dublin 4, Ireland
- Instituto per le Applicazioni del Calcolo, Consiglio Nazionale delle Ricerche, Rome, Italy
| | - Simone Meloni
- School of Physics, University College Dublin, Belfield, Dublin 4, Ireland
- Laboratory of Computational Chemistry and Biochemistry, École Polytechnique Fedérale de Lausanne, CH-1015 Lausanne, Switzerland
| | - Shuai Liang
- Deptartment of Chemistry, University of Calgary, Calgary, Alberta T2N 1N4, Canada
- Key Laboratory of Gas Hydrate, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou, China
| | - Niall J. English
- School of Chemical and Bioprocess Engineering, University College Dublin, Belfield, Dublin 4, Ireland
| | - Peter G. Kusalik
- Deptartment of Chemistry, University of Calgary, Calgary, Alberta T2N 1N4, Canada
| | - Giovanni Ciccotti
- School of Physics, University College Dublin, Belfield, Dublin 4, Ireland
- Dipartimento di Fisica and CNISM, Università La Sapienza, P. le A. Moro 5, 00185 Rome, Italy
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59
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Yuhara D, Barnes BC, Suh D, Knott BC, Beckham GT, Yasuoka K, Wu DT, Sum AK. Nucleation rate analysis of methane hydrate from molecular dynamics simulations. Faraday Discuss 2015; 179:463-74. [PMID: 25876773 DOI: 10.1039/c4fd00219a] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Clathrate hydrates are solid crystalline structures most commonly formed from solutions that have nucleated to form a mixed solid composed of water and gas. Understanding the mechanism of clathrate hydrate nucleation is essential to grasp the fundamental chemistry of these complex structures and their applications. Molecular dynamics (MD) simulation is an ideal method to study nucleation at the molecular level because the size of the critical nucleus and formation rate occur on the nano scale. Various analysis methods for nucleation have been developed through MD to analyze nucleation. In particular, the mean first-passage time (MFPT) and survival probability (SP) methods have proven to be effective in procuring the nucleation rate and critical nucleus size for monatomic systems. This study assesses the MFPT and SP methods, previously used for monatomic systems, when applied to analyzing clathrate hydrate nucleation. Because clathrate hydrate nucleation is relatively difficult to observe in MD simulations (due to its high free energy barrier), these methods have yet to be applied to clathrate hydrate systems. In this study, we have analyzed the nucleation rate and critical nucleus size of methane hydrate using MFPT and SP methods from data generated by MD simulations at 255 K and 50 MPa. MFPT was modified for clathrate hydrate from the original version by adding the maximum likelihood estimate and growth effect term. The nucleation rates calculated by MFPT and SP methods are within 5%, and the critical nucleus size estimated by the MFPT method was 50% higher, than values obtained through other more rigorous but computationally expensive estimates. These methods can also be extended to the analysis of other clathrate hydrates.
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Affiliation(s)
- Daisuke Yuhara
- Department of Mechanical Engineering, Keio University, Yokohama, Japan
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60
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Perspectives on molecular simulation of clathrate hydrates: Progress, prospects and challenges. Chem Eng Sci 2015. [DOI: 10.1016/j.ces.2014.07.047] [Citation(s) in RCA: 144] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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61
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Mosses J, Turton DA, Lue L, Sefcik J, Wynne K. Crystal templating through liquid–liquid phase separation. Chem Commun (Camb) 2015; 51:1139-42. [PMID: 25466237 DOI: 10.1039/c4cc07880b] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Fluff-like crystal growth of water in 1,2-dichloroethylene.
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Affiliation(s)
- Joanna Mosses
- School of Chemistry
- WestCHEM
- University of Glasgow
- Glasgow G12 8QQ
- UK
| | - David A. Turton
- School of Chemistry
- WestCHEM
- University of Glasgow
- Glasgow G12 8QQ
- UK
| | - Leo Lue
- Department of Chemical and Process Engineering
- University of Strathclyde
- Glasgow G1 1XJ
- UK
| | - Jan Sefcik
- Department of Chemical and Process Engineering
- University of Strathclyde
- Glasgow G1 1XJ
- UK
| | - Klaas Wynne
- School of Chemistry
- WestCHEM
- University of Glasgow
- Glasgow G12 8QQ
- UK
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62
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Identification of Clathrate Hydrates, Hexagonal Ice, Cubic Ice, and Liquid Water in Simulations: the CHILL+ Algorithm. J Phys Chem B 2014; 119:9369-76. [DOI: 10.1021/jp510289t] [Citation(s) in RCA: 117] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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63
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Devlin JP, Balcı FM, Maşlakcı Z, Uras-Aytemiz N. CO2 and C2H2 in cold nanodroplets of oxygenated organic molecules and water. J Chem Phys 2014; 141:18C506. [PMID: 25399171 DOI: 10.1063/1.4895549] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Recent demonstrations of subsecond and microsecond timescales for formation of clathrate hydrate nanocrystals hint at future methods of control of environmental and industrial gases such as CO2 and methane. Combined results from cold-chamber and supersonic-nozzle [A. S. Bhabhe, "Experimental study of condensation and freezing in a supersonic nozzle," Ph.D. thesis (Ohio State University, 2012), Chap. 7] experiments indicate extremely rapid encagement of components of all-vapor pre-mixtures. The extreme rates are derived from (a) the all-vapor premixing of the gas-hydrate components and (b) catalytic activity of certain oxygenated organic large-cage guests. Premixing presents no obvious barrier to large-scale conditions of formation. Further, from sequential efforts of the groups of Trout and Buch, a credible defect-based model of the catalysis mechanism exists for guidance. Since the catalyst-generated defects are both mobile and abundant, it is often unnecessary for a high percentage of the cages to be occupied by a molecular catalyst. Droplets represent the liquid phase that bridges the premixed vapor and clathrate hydrate phases but few data exist for the droplets themselves. Here we describe a focused computational and FTIR spectroscopic effort to characterize the aerosol droplets of the all-vapor cold-chamber methodology. Computational data for CO2 and C2H2, hetero-dimerized with each of the organic catalysts and water, closely match spectroscopic redshift patterns in both magnitude and direction. Though vibrational frequency shifts are an order of magnitude greater for the acetylene stretch mode, both CO2 and C2H2 experience redshift values that increase from that for an 80% water-methanol solvent through the solvent series to approximately doubled values for tetrahydrofuran and trimethylene oxide (TMO) droplets. The TMO solvent properties extend to a 50 mol.% solution of CO2, more than an order of magnitude greater than for the water-methanol solvent mixture. The impressive agreement between heterodimer and experimental shift values throughout the two series encourages speculation concerning local droplet structures while the stable shift patterns appear to be useful indicators of the gas solubilities.
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Affiliation(s)
- J Paul Devlin
- Department of Chemistry, Oklahoma State University, Stillwater, Oklahoma 74078, USA
| | - F Mine Balcı
- Department of Chemistry, Suleyman Demirel University, 32260 Isparta, Turkey
| | - Zafer Maşlakcı
- Department of Polymer Engineering, Karabuk University, 78050 Karabuk, Turkey
| | - Nevin Uras-Aytemiz
- Department of Polymer Engineering, Karabuk University, 78050 Karabuk, Turkey
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64
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Wang X, Sang DK, Chen J, Mi J. Theoretical insights into nucleation of CO2and CH4hydrates for CO2capture and storage. Phys Chem Chem Phys 2014; 16:26929-37. [DOI: 10.1039/c4cp03709j] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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65
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Yi L, Liang D, Zhou X, Li D, Wang J. Molecular dynamics simulations of carbon dioxide hydrate growth in electrolyte solutions of NaCl and MgCl2. Mol Phys 2014. [DOI: 10.1080/00268976.2014.932454] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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66
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Bi Y, Li T. Probing methane hydrate nucleation through the forward flux sampling method. J Phys Chem B 2014; 118:13324-32. [PMID: 24849698 DOI: 10.1021/jp503000u] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Understanding the nucleation of hydrate is the key to developing effective strategies for controlling methane hydrate formation. Here we present a computational study of methane hydrate nucleation, by combining the forward flux sampling (FFS) method and the coarse-grained water model mW. To facilitate the application of FFS in studying the formation of methane hydrate, we developed an effective order parameter λ on the basis of the topological analysis of the tetrahedral network. The order parameter capitalizes the signature of hydrate structure, i.e., polyhedral cages, and is capable of efficiently distinguishing hydrate from ice and liquid water while allowing the formation of different hydrate phases, i.e., sI, sII, and amorphous. Integration of the order parameter λ with FFS allows explicitly computing hydrate nucleation rates and obtaining an ensemble of nucleation trajectories under conditions where spontaneous hydrate nucleation becomes too slow to occur in direct simulation. The convergence of the obtained hydrate nucleation rate was found to depend crucially on the convergence of the spatial distribution for the spontaneously formed hydrate seeds obtained from the initial sampling of FFS. The validity of the approach is also verified by the agreement between the calculated nucleation rate and that inferred from the direct simulation. Analyzing the obtained large ensemble of hydrate nucleation trajectories, we show hydrate formation at 220 K and 500 bar is initiated by the nucleation events occurring in the vicinity of water-methane interface, and facilitated by a gradual transition from amorphous to crystalline structure. The latter provides the direct support to the proposed two-step nucleation mechanism of methane hydrate.
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Affiliation(s)
- Yuanfei Bi
- Department of Civil and Environmental Engineering, George Washington University , Washington, D.C. 20052, United States
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67
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English NJ, Lauricella M, Meloni S. Massively parallel molecular dynamics simulation of formation of clathrate-hydrate precursors at planar water-methane interfaces: Insights into heterogeneous nucleation. J Chem Phys 2014; 140:204714. [DOI: 10.1063/1.4879777] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
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68
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Barnes BC, Beckham GT, Wu DT, Sum AK. Two-component order parameter for quantifying clathrate hydrate nucleation and growth. J Chem Phys 2014; 140:164506. [PMID: 24784286 DOI: 10.1063/1.4871898] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Methane clathrate hydrate nucleation and growth is investigated via analysis of molecular dynamics simulations using a new order parameter. This order parameter (OP), named the Mutually Coordinated Guest (MCG) OP, quantifies the appearance and connectivity of molecular clusters composed of guests separated by water clusters. It is the first two-component OP used for quantifying hydrate nucleation and growth. The algorithm for calculating the MCG OP is described in detail. Its physical motivation and advantages compared to existing methods are discussed.
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Affiliation(s)
- Brian C Barnes
- Center for Hydrate Research, Chemical and Biological Engineering Department, Colorado School of Mines, Golden, Colorado 80401, USA
| | - Gregg T Beckham
- National Renewable Energy Laboratory, Golden, Colorado 80401, USA
| | - David T Wu
- Center for Hydrate Research, Chemical and Biological Engineering Department, Colorado School of Mines, Golden, Colorado 80401, USA
| | - Amadeu K Sum
- Center for Hydrate Research, Chemical and Biological Engineering Department, Colorado School of Mines, Golden, Colorado 80401, USA
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69
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Agarwal V, Peters B. Solute Precipitate Nucleation: A Review of Theory and Simulation Advances. ADVANCES IN CHEMICAL PHYSICS 2014. [DOI: 10.1002/9781118755815.ch03] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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70
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Nguyen AH, Molinero V. Cross-nucleation between clathrate hydrate polymorphs: Assessing the role of stability, growth rate, and structure matching. J Chem Phys 2014; 140:084506. [DOI: 10.1063/1.4866143] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
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71
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Zhang Y, Türkmen IR, Wassermann B, Erko A, Rühl E. Structural motifs of pre-nucleation clusters. J Chem Phys 2013; 139:134506. [DOI: 10.1063/1.4823497] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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72
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Sanz E, Vega C, Espinosa JR, Caballero-Bernal R, Abascal JLF, Valeriani C. Homogeneous Ice Nucleation at Moderate Supercooling from Molecular Simulation. J Am Chem Soc 2013; 135:15008-17. [DOI: 10.1021/ja4028814] [Citation(s) in RCA: 214] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- E. Sanz
- Departamento
de Química
Física, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040 Madrid, Spain
| | - C. Vega
- Departamento
de Química
Física, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040 Madrid, Spain
| | - J. R. Espinosa
- Departamento
de Química
Física, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040 Madrid, Spain
| | - R. Caballero-Bernal
- Departamento
de Química
Física, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040 Madrid, Spain
| | - J. L. F. Abascal
- Departamento
de Química
Física, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040 Madrid, Spain
| | - C. Valeriani
- Departamento
de Química
Física, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040 Madrid, Spain
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73
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Uras-Aytemiz N, Devlin JP. Communication: Fourier-transform infrared probing of remarkable quantities of gas trapped in cold homogeneously nucleated nanodroplets. J Chem Phys 2013; 139:021107. [PMID: 23862921 DOI: 10.1063/1.4813793] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Studies of catalyzed all-vapor gas-hydrate formation on a sub-second timescale have been extended with a special focus on liquid-droplet compositions at the instant of hydrate crystallization. This focus has been enabled by inclusion of methanol in the all-vapor mixture. This slows droplet to gas-hydrate conversion near 200 K to a time scale suited for standard FTIR sampling. Such droplet data are sought as a guide to ongoing efforts to reduce the amount of guest catalyst required for instant formation of the gas hydrates. For the same reason, all-vapor sampling has also been extended to the generation of long-lived liquid droplets with reduced or no water content. Observations of single-solvent droplets show that surprising quantities of gas molecules are trapped during rapid droplet growth. For example, CO2 is trapped at levels near 50 mol. % in droplets of acetone, tetrahydrofuran, or trimethylene oxide formed under CO2 pressures of several Torr in a cold-chamber at 170 K. Less but significant amounts of gas are trapped at higher temperatures, or in methanol or water-methanol droplets. The droplet metastability appears to commonly lead to formation of bubbles larger than the original nanodroplets. Besides serving as a guide for the all-vapor gas-hydrate studies, the semiquantitative evidence of extensive trapping of gases is expected to have a role in future studies of atmospheric aerosols.
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Affiliation(s)
- Nevin Uras-Aytemiz
- Deparment of Chemistry, Suleyman Demirel University, 32260 Isparta, Turkey
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74
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Cooper RJ, Chang TM, Williams ER. Hydrated Alkali Metal Ions: Spectroscopic Evidence for Clathrates. J Phys Chem A 2013; 117:6571-9. [DOI: 10.1021/jp405147h] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Richard J. Cooper
- Department of Chemistry, University of California, Berkeley, California 94720-1460, United
States
| | - Terrence M. Chang
- Department of Chemistry, University of California, Berkeley, California 94720-1460, United
States
| | - Evan R. Williams
- Department of Chemistry, University of California, Berkeley, California 94720-1460, United
States
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75
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Nguyen AH, Molinero V. Stability and Metastability of Bromine Clathrate Polymorphs. J Phys Chem B 2013; 117:6330-8. [DOI: 10.1021/jp403503d] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Andrew H. Nguyen
- Department of Chemistry, The University of Utah, 315 South 1400 East, Salt Lake City, Utah 84112-0850,
United States
| | - Valeria Molinero
- Department of Chemistry, The University of Utah, 315 South 1400 East, Salt Lake City, Utah 84112-0850,
United States
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76
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Pirzadeh P, Kusalik PG. Molecular insights into clathrate hydrate nucleation at an ice-solution interface. J Am Chem Soc 2013; 135:7278-87. [PMID: 23638636 DOI: 10.1021/ja400521e] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Clathrate hydrates are specific cage-like structures formed by water molecules around a guest molecule. Despite the many studies that have been performed on clathrate hydrates, the actual molecular mechanism of both their homogeneous and heterogeneous nucleation has yet to be fully clarified. Here, by means of molecular simulations, we demonstrate how the interface of hexagonal ice can facilitate the heterogeneous nucleation of methane clathrate hydrate from an aqueous methane solution. Our results indicate an initial accumulation of methane molecules, which promote induction of defective structures, particularly coupled 5-8 ring defects, at the ice surface. Structural fluctuations promoted by these defective motifs assist hydrate cage formation next to the interface. The cage-like structures formed then act as a sink for methane molecules in the solution and enhance the stability and growth of an amorphous nucleus, which can evolve into a hydrate crystal upon annealing. These results are illustrative of how a surface that is structurally incompatible can serve to facilitate heterogeneous nucleation of a new crystalline phase. They should also further our general understanding of the formation of gas hydrates and their critical roles in various industrial and environmental processes, including carbon capture and storage.
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Affiliation(s)
- Payman Pirzadeh
- Department of Chemistry, University of Calgary, Calgary, Alberta, Canada
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78
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Bai D, Liu B, Chen G, Zhang X, Wang W. Role of Guest Molecules on the Hydrate Growth at Vapor-Liquid Interfaces. AIChE J 2013. [DOI: 10.1002/aic.14011] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
| | - Bei Liu
- State Key Laboratory of Heavy Oil Processing; School of Chemical Engineering, China University of Petroleum; Beijing; 102249; China
| | - Guangjin Chen
- State Key Laboratory of Heavy Oil Processing; School of Chemical Engineering, China University of Petroleum; Beijing; 102249; China
| | - Xianren Zhang
- Division of Molecular and Materials Simulation; State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology; Beijing; 100029; China
| | - Wenchuan Wang
- Division of Molecular and Materials Simulation; State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology; Beijing; 100029; China
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79
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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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80
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Perrin A, Musa OM, Steed JW. The chemistry of low dosage clathrate hydrate inhibitors. Chem Soc Rev 2013; 42:1996-2015. [DOI: 10.1039/c2cs35340g] [Citation(s) in RCA: 274] [Impact Index Per Article: 24.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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81
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Uras-Aytemiz N, Cwiklik L, Paul Devlin J. Tracking all-vapor instant gas-hydrate formation and guest molecule populations: a possible probe for molecules trapped in water nanodroplets. J Chem Phys 2012. [PMID: 23206013 DOI: 10.1063/1.4767370] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Quantitative Fourier-transform infrared spectra for low-temperature (160-200 K) aerosols of clathrate-hydrate nanoparticles that contain large-cage catalysts and small-cage nonpolar guests have been extended to a broad range of vapor compositions and sampling conditions. The data better reveal the stages by which room-temperature vapor mixtures, when cooled below ∼220 K, instantly generate aerosols with particles composed exclusively of the corresponding clathrate hydrates. In particular the quantitative data help relate the nature of the hydrates that form to the composition of the aqueous nanodroplets of the first stages of the rapid transition from the all-vapor mixture. The overall transition from an all-vapor mixture to "gas"-hydrate nanocrystals is a multistage one that has been characterized as homogeneous nucleation and growth of solution nanodroplets (∼240 K) followed by nucleation and growth of the gas-hydrate particles (∼220 K); all occurring within a subsecond that follows pulsing of the warm vapor into a sampling cold chamber. This may serve well as a general description of the instantaneous generation of the gas-hydrate aerosols, but closer consideration of the nature of the sampling method, in context with recent computation-based insights to (a) gas-hydrate nucleation stages∕rates and (b) the lifetimes of trapped small nonpolar molecules in cold aqueous nanodroplets, suggests a more complex multistage transition. The simulated lifetimes and extensive new quantitative infrared data significantly broaden the knowledge base in which the instantaneous transition from vapor to crystalline hydrate particles is viewed. The apparent need for a high occupancy of large-cage catalytic guest molecules currently limits the practical value of the all-vapor method. Only through greater clarity in the molecular-level description of the transition will the ultimate limits be defined.
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Affiliation(s)
- Nevin Uras-Aytemiz
- Department of Chemistry, Suleyman Demirel University, 32260 Isparta, Turkey
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82
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Knott BC, Molinero V, Doherty MF, Peters B. Homogeneous Nucleation of Methane Hydrates: Unrealistic under Realistic Conditions. J Am Chem Soc 2012; 134:19544-7. [DOI: 10.1021/ja309117d] [Citation(s) in RCA: 195] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Brandon C. Knott
- Department of Chemical Engineering, University of California, Santa Barbara, California
93106, United States
| | - Valeria Molinero
- Department
of Chemistry, University of Utah, Salt
Lake City, Utah 84112, United
States
| | - Michael F. Doherty
- Department of Chemical Engineering, University of California, Santa Barbara, California
93106, United States
| | - Baron Peters
- Department of Chemical Engineering, University of California, Santa Barbara, California
93106, United States
- Department of Chemistry
and Biochemistry, University of California, Santa Barbara, California
93106, United States
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83
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Sarupria S, Debenedetti PG. Homogeneous Nucleation of Methane Hydrate in Microsecond Molecular Dynamics Simulations. J Phys Chem Lett 2012; 3:2942-7. [PMID: 26292230 DOI: 10.1021/jz3012113] [Citation(s) in RCA: 99] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
We report atomistically detailed molecular dynamics simulations of homogeneous nucleation of methane hydrate in bulk aqueous phase in the absence of any interface. Subcritical clusters of water and methane molecules are formed in the initial segment of the simulations, which then aggregate to give the critical hydrate nucleus. This occurs over time scales of several hundred nanoseconds, indicating that the formation and aggregation of subcritical clusters can contribute significantly to the overall rate of hydrate nucleation. The clusters have elements of sI hydrate structure, such as 5(12) and 5(12)6(2) cages as well as other uncommon 5(12)6(3) and 5(12)6(4) cages, but do not possess long-range order. Clusters are dynamic in nature and undergo continuous structural rearrangements.
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Affiliation(s)
- Sapna Sarupria
- †Department of Chemical and Biomolecular Engineering, Clemson University, Clemson, South Carolina 29634, United States
- ‡Department of Chemical and Biological Engineering, Princeton University, Princeton, New Jersey 08544, United States
| | - Pablo G Debenedetti
- ‡Department of Chemical and Biological Engineering, Princeton University, Princeton, New Jersey 08544, United States
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84
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Chandaluri CG, Radhakrishnan TP. Amorphous-to-Crystalline Transformation with Fluorescence Enhancement and Switching of Molecular Nanoparticles Fixed in a Polymer Thin Film. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201205081] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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85
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Chandaluri CG, Radhakrishnan TP. Amorphous-to-crystalline transformation with fluorescence enhancement and switching of molecular nanoparticles fixed in a polymer thin film. Angew Chem Int Ed Engl 2012; 51:11849-52. [PMID: 23076763 DOI: 10.1002/anie.201205081] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2012] [Indexed: 11/09/2022]
Affiliation(s)
- Ch G Chandaluri
- School of Chemistry, University of Hyderabad, Hyderabad, 500 046, India
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86
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Baron R, Molinero V. Water-Driven Cavity–Ligand Binding: Comparison of Thermodynamic Signatures from Coarse-Grained and Atomic-Level Simulations. J Chem Theory Comput 2012; 8:3696-704. [DOI: 10.1021/ct300121r] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Riccardo Baron
- Department of Medicinal Chemistry,
College of Pharmacy, and The Henry Eyring Center for Theoretical Chemistry,
The University of Utah, Salt Lake City, Utah 84112-5820, United States
| | - Valeria Molinero
- Department of Chemistry and
The Henry Eyring Center for Theoretical Chemistry, The University
of Utah, 315 South 1400 East, Salt Lake City, Utah 84112-0850, United
States
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87
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Zhang J, Di Lorenzo M, Pan Z. Effect of Surface Energy on Carbon Dioxide Hydrate Formation. J Phys Chem B 2012; 116:7296-301. [DOI: 10.1021/jp3021613] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | | | - Zhejun Pan
- CSIRO CESRE, Ian Wark Laboratory, Bayview Ave, Clayton,
Vic 3168, Australia
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88
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Bai D, Chen G, Zhang X, Wang W. Nucleation of the CO2 hydrate from three-phase contact lines. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:7730-7736. [PMID: 22551251 DOI: 10.1021/la300647s] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Using molecular dynamics simulations on the microsecond time scale, we investigate the nucleation and growth mechanisms of CO(2) hydrates in a water/CO(2)/silica three-phase system. Our simulation results indicate that the CO(2) hydrate nucleates near the three-phase contact line rather than at the two-phase interfaces and then grows along the contact line to form an amorphous crystal. In the nucleation stage, the hydroxylated silica surface can be understand as a stabilizer to prolong the lifetime of adsorbed hydrate cages that interact with the silica surface by hydrogen bonding, and the adsorbed cages behave as the nucleation sites for the formation of an amorphous CO(2) hydrate. After nucleation, the nucleus grows along the three-phase contact line and prefers to develop toward the CO(2) phase as a result of the hydrophilic nature of the modified solid surface and the easy availability of CO(2) molecules. During the growth process, the population of sI cages in the formed amorphous crystal is found to increase much faster than that of sII cages, being in agreement with the fact that only the sI hydrate can be formed in nature for CO(2) molecules.
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Affiliation(s)
- Dongsheng Bai
- Division of Molecular and Materials Simulation, State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China
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89
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Jacobson LC, Matsumoto M, Molinero V. Order parameters for the multistep crystallization of clathrate hydrates. J Chem Phys 2011; 135:074501. [PMID: 21861570 DOI: 10.1063/1.3613667] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Recent reports indicate that the crystallization of clathrate hydrates occurs in multiple steps that involve amorphous intermediates and metastable clathrate crystals. The elucidation of the reaction coordinate for clathrate crystallization requires the use of order parameters able to identify the reactants, products, and intermediates in the crystallization pathway. Nevertheless, existing order parameters cannot distinguish between amorphous and crystalline clathrates or between different clathrate crystals. In this work, we present the first set of order parameters that discern between the sI and sII clathrate crystals, the amorphous clathrates, the blob of solvent-separated guests and the liquid solution. These order parameters can be used to monitor the advance of the crystallization and for the efficient implementation of methods to sample the rare clathrate nucleation events in molecular simulations. We illustrate the use of these order parameters in the analysis of the growth and the dissolution of clathrate crystals and the spontaneous nucleation and growth of clathrates under conditions of high supercooling.
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Affiliation(s)
- Liam C Jacobson
- Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, Utah 84112-0850, USA
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90
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Limmer DT, Chandler D. The putative liquid-liquid transition is a liquid-solid transition in atomistic models of water. J Chem Phys 2011; 135:134503. [DOI: 10.1063/1.3643333] [Citation(s) in RCA: 280] [Impact Index Per Article: 21.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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91
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Walsh MR, Rainey JD, Lafond PG, Park DH, Beckham GT, Jones MD, Lee KH, Koh CA, Sloan ED, Wu DT, Sum AK. The cages, dynamics, and structuring of incipient methane clathrate hydrates. Phys Chem Chem Phys 2011; 13:19951-9. [DOI: 10.1039/c1cp21899a] [Citation(s) in RCA: 101] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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92
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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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