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Rankin DJ, Huang DM. Non-equilibrium molecular dynamics of steady-state fluid transport through a 2D membrane driven by a concentration gradient. J Chem Phys 2023; 159:214705. [PMID: 38038206 DOI: 10.1063/5.0178576] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Accepted: 11/09/2023] [Indexed: 12/02/2023] Open
Abstract
We use a novel non-equilibrium algorithm to simulate steady-state fluid transport through a two-dimensional (2D) membrane due to a concentration gradient by molecular dynamics (MD) for the first time. We confirm that, as required by the Onsager reciprocal relations in the linear-response regime, the solution flux obtained using this algorithm agrees with the excess solute flux obtained from an established non-equilibrium MD algorithm for pressure-driven flow. In addition, we show that the concentration-gradient-driven solution flux in this regime is quantified far more efficiently by explicitly applying a transmembrane concentration difference using our algorithm than by applying Onsager reciprocity to pressure-driven flow. The simulated fluid fluxes are captured with reasonable quantitative accuracy by our previously derived continuum theory of concentration-gradient-driven fluid transport through a 2D membrane [D. J. Rankin, L. Bocquet, and D. M. Huang, J. Chem. Phys. 151, 044705 (2019)] for a wide range of solution and membrane parameters, even though the simulated pore sizes are only several times the size of the fluid particles. The simulations deviate from the theory for strong solute-membrane interactions relative to thermal energy, for which the theoretical approximations breakdown. Our findings will be beneficial for a molecular-level understanding of fluid transport driven by concentration gradients through membranes made from 2D materials, which have diverse applications in energy harvesting, molecular separations, and biosensing.
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Affiliation(s)
- Daniel J Rankin
- Department of Chemistry, School of Physics, Chemistry and Earth Sciences, The University of Adelaide, Adelaide, SA 5005, Australia
| | - David M Huang
- Department of Chemistry, School of Physics, Chemistry and Earth Sciences, The University of Adelaide, Adelaide, SA 5005, Australia
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2
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Karmakar T, Finney AR, Salvalaglio M, Yazaydin AO, Perego C. Non-Equilibrium Modeling of Concentration-Driven processes with Constant Chemical Potential Molecular Dynamics Simulations. Acc Chem Res 2023; 56:1156-1167. [PMID: 37120847 DOI: 10.1021/acs.accounts.2c00811] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
ConspectusConcentration-driven processes in solution, i.e., phenomena that are sustained by persistent concentration gradients, such as crystallization and surface adsorption, are fundamental chemical processes. Understanding such phenomena is crucial for countless applications, from pharmaceuticals to biotechnology. Molecular dynamics (MD), both in- and out-of-equilibrium, plays an essential role in the current understanding of concentration-driven processes. Computational costs, however, impose drastic limitations on the accessible scale of simulated systems, hampering the effective study of such phenomena. In particular, due to these size limitations, closed system MD of concentration-driven processes is affected by solution depletion/enrichment that unavoidably impacts the dynamics of the chemical phenomena under study. As a notable example, in simulations of crystallization from solution, the transfer of monomers between the liquid and crystal phases results in a gradual depletion/enrichment of solution concentration, altering the driving force for phase transition. In contrast, this effect is negligible in experiments, given the macroscopic size of the solution volume. Because of these limitations, accurate MD characterization of concentration-driven phenomena has proven to be a long-standing simulation challenge. While disparate equilibrium and nonequilibrium simulation strategies have been proposed to address the study of such processes, the methodologies are in continuous development.In this context, a novel simulation technique named constant chemical potential molecular dynamics (CμMD) was recently proposed. CμMD employs properly designed, concentration-dependent external forces that regulate the flux of solute species between selected subregions of the simulation volume. This enables simulations of systems under a constant chemical drive in an efficient and straightforward way. The CμMD scheme was originally applied to the case of crystal growth from solution and then extended to the simulation of various physicochemical processes, resulting in new variants of the method. This Account illustrates the CμMD method and the key advances enabled by it in the framework of in silico chemistry. We review results obtained in crystallization studies, where CμMD allows growth rate calculations and equilibrium shape predictions, and in adsorption studies, where adsorption thermodynamics on porous or solid surfaces was correctly characterized via CμMD. Furthermore, we will discuss the application of CμMD variants to simulate permeation through porous materials, solution separation, and nucleation upon fixed concentration gradients. While presenting the numerous applications of the method, we provide an original and comprehensive assessment of concentration-driven simulations using CμMD. To this end, we also shed light on the theoretical and technical foundations of CμMD, underlining the novelty and specificity of the method with respect to existing techniques while stressing its current limitations. Overall, the application of CμMD to a diverse range of fields provides new insight into many physicochemical processes, the in silico study of which has been hitherto limited by finite-size effects. In this context, CμMD stands out as a general-purpose method that promises to be an invaluable simulation tool for studying molecular-scale concentration-driven phenomena.
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Affiliation(s)
- Tarak Karmakar
- Department of Chemistry, Indian Institute of Technology, Delhi, Hauz Khas, New Delhi 110016, India
| | - Aaron R Finney
- Thomas Young Centre and Department of Chemical Engineering, University College London, Torrington Place, London WC1E 7JE, United Kingdom
| | - Matteo Salvalaglio
- Thomas Young Centre and Department of Chemical Engineering, University College London, Torrington Place, London WC1E 7JE, United Kingdom
| | - A Ozgur Yazaydin
- Thomas Young Centre and Department of Chemical Engineering, University College London, Torrington Place, London WC1E 7JE, United Kingdom
| | - Claudio Perego
- Department of Innovative Technologies, University of Applied Sciences and Arts of Southern Switzerland, Polo Universitario Lugano, via la Santa 1, 6962 Lugano-Viganello, Switzerland
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3
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Schaefer D, Stephan S, Langenbach K, Horsch MT, Hasse H. Mass Transfer through Vapor-Liquid Interfaces Studied by Non-Stationary Molecular Dynamics Simulations. J Phys Chem B 2023; 127:2521-2533. [PMID: 36896991 DOI: 10.1021/acs.jpcb.2c08752] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/11/2023]
Abstract
Molecular dynamics (MD) simulations are highly attractive for studying the influence of interfacial effects, such as the enrichment of components, on the mass transfer through the interface. In a recent work, we have presented a steady-state MD simulation method for investigating this phenomenon and tested it using model mixtures with and without interfacial enrichment. The present study extends this work by introducing a non-stationary MD simulation method. A rectangular simulation box that contains a mixture of two components 1 + 2 with a vapor phase in the middle and two liquid phases on both sides is used. Starting from a vapor-liquid equilibrium state, a non-stationary molar flux of component 2 is induced by inserting particles of component 2 into the center of the vapor phase in a pulse-like manner. During the isothermal relaxation process, particles of component 2 pass through the vapor phase, cross the vapor-liquid interface, and enter the liquid phase. The system thereby relaxes into a new vapor-liquid equilibrium state. During the relaxation process, spatially resolved responses for the component densities, fluxes, and pressure are sampled. To reduce the noise and provide measures for the uncertainty of the observables, a set of replicas of simulations is carried out. The new simulation method was applied to study mass transfer in two binary Lennard-Jones mixtures: one that exhibits a strong enrichment of the low-boiling component 2 at the vapor-liquid interface and one that shows no enrichment. Even though both mixtures have similar transport coefficients in the bulk phases, the results for mass transfer differ significantly, indicating that the interfacial enrichment influences the mass transfer.
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Affiliation(s)
- Dominik Schaefer
- Laboratory of Engineering Thermodynamics (LTD), TU Kaiserslautern, 67663 Kaiserslautern, Germany
| | - Simon Stephan
- Laboratory of Engineering Thermodynamics (LTD), TU Kaiserslautern, 67663 Kaiserslautern, Germany
| | - Kai Langenbach
- Institute of Chemical Engineering, University of Innsbruck, 6020 Innsbruck, Austria
| | - Martin T Horsch
- Norwegian University of Life Sciences, Faculty of Science and Technology, Department of Data Science, Drøbakveien 31, 1430 Ås, Norway
| | - Hans Hasse
- Laboratory of Engineering Thermodynamics (LTD), TU Kaiserslautern, 67663 Kaiserslautern, Germany
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Hirosawa F, Miyagawa M, Takaba H. High Efficient CO 2 Separation at High Pressure by Grain-Boundary-Controlled CHA Zeolite Membrane Investigated by Non-Equilibrium Molecular Dynamics. MEMBRANES 2023; 13:278. [PMID: 36984664 PMCID: PMC10056463 DOI: 10.3390/membranes13030278] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Accepted: 02/23/2023] [Indexed: 06/18/2023]
Abstract
The CO2 permeability and selectivity of CHA-type zeolite membranes in the separation of a CO2/CH4 mixture gas at high pressure were evaluated using non-equilibrium molecular dynamics (NEMD). It was found that in a perfectly crystalline, defect-free CHA membrane, the adsorption of CH4, which diffuses slowly in the pores, hinders CO2 permeation. Therefore, an increase in the amount of CH4 adsorbed at high pressure decreases the CO2 permeability and significantly reduces the CO2 selectivity of the CHA membrane. CHA membranes with grain boundaries parallel to the permeation direction were found to show higher CO2 selectivity than perfectly crystalline CHA membranes at high pressure, as the blocking effect of CH4 on CO2 permeation occurring within the grain boundary is not significant. This paper is the first to show that the CO2 permeability of CHA membranes with controlled grain boundaries can exceed the intrinsic performance of fully crystalline zeolite membranes at high pressure.
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Affiliation(s)
- Fumiya Hirosawa
- Graduate School of Engineering, Kogakuin University, Tokyo 192-0015, Japan
| | - Masaya Miyagawa
- Department of Environmental Chemistry and Chemical Engineering, School of Advanced Engineering, Kogakuin University, Tokyo 192-0015, Japan
| | - Hiromitsu Takaba
- Department of Environmental Chemistry and Chemical Engineering, School of Advanced Engineering, Kogakuin University, Tokyo 192-0015, Japan
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5
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Wang X, Dobnikar J, Frenkel D. Numerical Test of the Onsager Relations in a Driven System. PHYSICAL REVIEW LETTERS 2022; 129:238002. [PMID: 36563229 DOI: 10.1103/physrevlett.129.238002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Revised: 10/06/2022] [Accepted: 11/09/2022] [Indexed: 06/17/2023]
Abstract
The Onsager reciprocity relations were formulated in the context of irreversible thermodynamics, but they are based on assumptions that have a wider applicability. Here, we present simulations testing the Onsager relations between surface-coupled diffusive and bulk fluxes in a system prepared in a nonequilibrium steady state. The system consists of a mixture of two identical species maintained at different temperatures inside a channel. In order to tune the friction of the two species with the walls independently, while keeping the particle-wall interaction potentials the same, we allow the kinematics of particle-wall collisions to be different: "bounce-back" (B) or "specular" (S). In the BB case, diffusio-capillary transport can only take place if the two species have different temperatures. We find that the Onsager reciprocity relations are obeyed in the linear regime, even in the BB case where all fluxes are the result of perturbing the system from a nonequilibrium steady state in a way that does not satisfy time-reversal symmetry. Our Letter provides a direct, numerical illustration of the validity of the Onsager relations outside their original range of application, and suggests their relevance for transport in driven or active systems.
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Affiliation(s)
- Xipeng Wang
- Key Laboratory of Soft Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Jure Dobnikar
- Key Laboratory of Soft Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China, and Songshan Lake Materials Laboratory, Dongguan, Guangdong 523808, China
| | - Daan Frenkel
- Yusuf Hamied Department of Chemistry, University of Cambridge Lensfield Road, Cambridge CB2 1EW, United Kingdom
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Xia Y, Rao Q, Hamed A, Kane J, Semeykina V, Zharov I, Deo M, Li Z. Flow Reduction in Pore Networks of Packed Silica Nanoparticles: Insights from Mesoscopic Fluid Models. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:8135-8152. [PMID: 35731695 DOI: 10.1021/acs.langmuir.2c01038] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
A modified many-body dissipative particle dynamics (mDPD) model is rigorously calibrated to achieve realistic fluid-fluid/solid interphase properties and applied for mesoscale flow simulations to elucidate the transport mechanisms of heptane liquid and water, respectively, through pore networks formed by packed silica nanoparticles with a uniform diameter of 30 nm. Two million CPU core hours were used to complete the simulation studies. Results show reduction of permeability by 54-64% in heptane flow and by 88-91% in water flow, respectively, compared to the Kozeny-Carman equation. In these nanopores, a large portion of the fluids are in the near-wall regions and thus not mobile due to the confinement effect, resulting in reduced hydraulic conductivity. Moreover, intense oscillations in the calculated flow velocities also indicate the confinement effect that contests the external driven force to flow. The generic form of Darcy's law is considered valid for flow through homogeneous nanopore networks, while permeability depends collectively on pore size and surface wettability. This fluid-permeability dependency is unique to flow in nanopores. In addition, potential dependence of permeability on pore connectivity is observed when the porosity remains the same in different core specimens.
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Affiliation(s)
- Yidong Xia
- Energy and Environment Science and Technology, Idaho National Laboratory, Idaho Falls, Idaho 83415, United States
| | - Qi Rao
- Energy and Environment Science and Technology, Idaho National Laboratory, Idaho Falls, Idaho 83415, United States
| | - Ahmed Hamed
- Energy and Environment Science and Technology, Idaho National Laboratory, Idaho Falls, Idaho 83415, United States
| | - Joshua Kane
- Materials and Fuels Complex, Idaho National Laboratory, Idaho Falls, Idaho 83415, United States
| | - Viktoriya Semeykina
- Department of Chemistry, The University of Utah, Salt Lake City, Utah 84112, United States
| | - Ilya Zharov
- Department of Chemistry, The University of Utah, Salt Lake City, Utah 84112, United States
| | - Milind Deo
- Department of Chemical Engineering, The University of Utah, Salt Lake City, Utah 84112, United States
| | - Zhen Li
- Department of Mechanical Engineering, Clemson University, Clemson, South Carolina 29634, United States
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7
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Fayaz-Torshizi M, Xu W, Vella JR, Marshall BD, Ravikovitch PI, Müller EA. Use of Boundary-Driven Nonequilibrium Molecular Dynamics for Determining Transport Diffusivities of Multicomponent Mixtures in Nanoporous Materials. J Phys Chem B 2022; 126:1085-1100. [PMID: 35104134 PMCID: PMC9007456 DOI: 10.1021/acs.jpcb.1c09159] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
![]()
The boundary-driven molecular modeling
strategy to evaluate mass
transport coefficients of fluids in nanoconfined media is revisited
and expanded to multicomponent mixtures. The method requires setting
up a simulation with bulk fluid reservoirs upstream and downstream
of a porous media. A fluid flow is induced by applying an external
force at the periodic boundary between the upstream and downstream
reservoirs. The relationship between the resulting flow and the density
gradient of the adsorbed fluid at the entrance/exit of the porous
media provides for a direct path for the calculation of the transport
diffusivities. It is shown how the transport diffusivities found this
way relate to the collective, Onsager, and self-diffusion coefficients,
typically used in other contexts to describe fluid transport in porous
media. Examples are provided by calculating the diffusion coefficients
of a Lennard-Jones (LJ) fluid and mixtures of differently sized LJ
particles in slit pores, a realistic model of methane in carbon-based
slit pores, and binary mixtures of methane with hypothetical counterparts
having different attractions to the solid. The method is seen to be
robust and particularly suited for the study of study of transport
of dense fluids and liquids in nanoconfined media.
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Affiliation(s)
- Maziar Fayaz-Torshizi
- Department of Chemical Engineering, Imperial College London, London SW7 2AZ, United Kingdom
| | - Weilun Xu
- Department of Chemical Engineering, Imperial College London, London SW7 2AZ, United Kingdom
| | - Joseph R Vella
- ExxonMobil Research and Engineering Company, Irving, Texas 75039-2298, United States
| | - Bennett D Marshall
- ExxonMobil Research and Engineering Company, Annandale, New Jersey 08801, United States
| | - Peter I Ravikovitch
- ExxonMobil Research and Engineering Company, Annandale, New Jersey 08801, United States
| | - Erich A Müller
- Department of Chemical Engineering, Imperial College London, London SW7 2AZ, United Kingdom
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8
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Rao Q, Xia Y, Li J, Deo M, Li Z. Flow reduction of hydrocarbon liquid in silica nanochannel: Insight from many-body dissipative particle dynamics simulations. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.117673] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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9
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Molecular simulation study of oil-water two-phase fluid transport in shale inorganic nanopores. Chem Eng Sci 2021. [DOI: 10.1016/j.ces.2021.116948] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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10
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Rauter MT, Schnell SK, Kjelstrup S. Cassie-Baxter and Wenzel States and the Effect of Interfaces on Transport Properties across Membranes. J Phys Chem B 2021; 125:12730-12740. [PMID: 34755514 PMCID: PMC8630791 DOI: 10.1021/acs.jpcb.1c07931] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Mass transfer across a liquid-repelling gas permeable membrane is influenced by the state(s) of the liquid-vapor interface(s) on the surface of the membrane, the pore geometry, and the solid-fluid interactions inside the membrane. By tuning the different local contributions, it is possible to enhance the temperature difference-driven mass flux across the membrane for a constant driving force. Non-equilibrium molecular dynamics simulations were used to simulate a temperature difference-driven mass flux through a gas permeable membrane with the evaporating liquid on one side and the condensing liquid on the other. Both sides were simulated for Wenzel- and Cassie-Baxter-like states. The interaction between the fluid and the solid inside the gas permeable membrane varied between the wetting angles of θ = 125° and θ = 103°. For a constant driving force, the Cassie-Baxter state led to an increased mass flux of almost 40% in comparison to the Wenzel state (given a small pore resistance). This difference was caused by an insufficient supply of vapor particles at the pore entrance in the Wenzel state. The difference between the Wenzel and Cassie-Baxter states decreased with increasing resistance of the pore. The condensing liquid-vapor interface area contributed in the same manner to the overall transport resistance as the evaporating liquid-vapor interface area. A higher repulsion between the fluid and the solid inside the membrane decreased the overall resistance.
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Affiliation(s)
- Michael T Rauter
- PoreLab, Department of Chemistry, Norwegian University of Science and Technology, NO-7491 Trondheim, Norway
| | - Sondre K Schnell
- Department of Materials Science and Engineering, Norwegian University of Science and Technology, NO-7491 Trondheim, Norway
| | - Signe Kjelstrup
- PoreLab, Department of Chemistry, Norwegian University of Science and Technology, NO-7491 Trondheim, Norway
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11
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Daglar H, Erucar I, Keskin S. Recent advances in simulating gas permeation through MOF membranes. MATERIALS ADVANCES 2021; 2:5300-5317. [PMID: 34458845 PMCID: PMC8366394 DOI: 10.1039/d1ma00026h] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Accepted: 07/21/2021] [Indexed: 05/20/2023]
Abstract
In the last two decades, metal organic frameworks (MOFs) have gained increasing attention in membrane-based gas separations due to their tunable structural properties. Computational methods play a critical role in providing molecular-level information about the membrane properties and identifying the most promising MOF membranes for various gas separations. In this review, we discuss the current state-of-the-art in molecular modeling methods to simulate gas permeation through MOF membranes and review the recent advancements. We finally address current opportunities and challenges of simulating gas permeation through MOF membranes to guide the development of high-performance MOF membranes in the future.
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Affiliation(s)
- Hilal Daglar
- Department of Chemical and Biological Engineering, Koc University, Rumelifeneri Yolu Sariyer 34450 Istanbul Turkey +90-(212)-338-1362
| | - Ilknur Erucar
- Department of Natural and Mathematical Sciences, Faculty of Engineering, Ozyegin University, Cekmekoy 34794 Istanbul Turkey
| | - Seda Keskin
- Department of Chemical and Biological Engineering, Koc University, Rumelifeneri Yolu Sariyer 34450 Istanbul Turkey +90-(212)-338-1362
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12
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Rauter MT, Schnell SK, Hafskjold B, Kjelstrup S. Thermo-osmotic pressure and resistance to mass transport in a vapor-gap membrane. Phys Chem Chem Phys 2021; 23:12988-13000. [PMID: 34085062 DOI: 10.1039/d0cp06556k] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We have investigated the transport of fluid through a vapor-gap membrane. The transport due to a membrane temperature difference was investigated under isobaric as well as non-isobaric conditions. Such a concept is relevant for water cleaning and power production purposes. A coarse-grained water model was used for modelling transport through pores of different diameters and lengths. The wall-fluid interactions were set so as to mimic hydrophobic interactions between water and membrane. The mass transport through the membrane scaled linearly with the applied temperature difference. Soret equilibria were obtained when the thermo-osmotic pressure was 18 bar K-1. The state of the Soret equilibrium did not depend on the pore size or pore length as expected. We show that the Soret equilibrium cannot be sustained by a gradient in vapor pressure. The fluxes of heat and mass were used to compute the total resistances to the transport of heat and mass.
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Affiliation(s)
- Michael T Rauter
- PoreLab, Department of Chemistry, Norwegian University of Science and Technology, NO-7491 Trondheim, Norway.
| | - Sondre K Schnell
- Department of Materials Science and Engineering, Norwegian University of Science and Technology, NO-7491 Trondheim, Norway
| | - Bjørn Hafskjold
- PoreLab, Department of Chemistry, Norwegian University of Science and Technology, NO-7491 Trondheim, Norway.
| | - Signe Kjelstrup
- PoreLab, Department of Chemistry, Norwegian University of Science and Technology, NO-7491 Trondheim, Norway.
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Daglar H, Keskin S. Recent advances, opportunities, and challenges in high-throughput computational screening of MOFs for gas separations. Coord Chem Rev 2020. [DOI: 10.1016/j.ccr.2020.213470] [Citation(s) in RCA: 76] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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14
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Nezbeda I, Škvára J. On industrial applications of molecular simulations. MOLECULAR SIMULATION 2020. [DOI: 10.1080/08927022.2020.1828584] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Ivo Nezbeda
- Institute of Chemical Process Fundamentals, Academy of Sciences, Prague 6, Czech Republic
- Faculty of Science, J. E. Purkinje University, Ústí nad Labem, Czech Republic
| | - Jiří Škvára
- Institute of Chemical Process Fundamentals, Academy of Sciences, Prague 6, Czech Republic
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15
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Stephan S, Schaefer D, Langenbach K, Hasse H. Mass transfer through vapour–liquid interfaces: a molecular dynamics simulation study. Mol Phys 2020. [DOI: 10.1080/00268976.2020.1810798] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Simon Stephan
- Laboratory of Engineering Thermodynamics (LTD), TU Kaiserslautern, Kaiserslautern, Germany
| | - Dominik Schaefer
- Laboratory of Engineering Thermodynamics (LTD), TU Kaiserslautern, Kaiserslautern, Germany
| | - Kai Langenbach
- Laboratory of Engineering Thermodynamics (LTD), TU Kaiserslautern, Kaiserslautern, Germany
| | - Hans Hasse
- Laboratory of Engineering Thermodynamics (LTD), TU Kaiserslautern, Kaiserslautern, Germany
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16
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Ramírez-Hinestrosa S, Yoshida H, Bocquet L, Frenkel D. Studying polymer diffusiophoresis with non-equilibrium molecular dynamics. J Chem Phys 2020; 152:164901. [PMID: 32357768 DOI: 10.1063/5.0007235] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
We report a numerical study of the diffusiophoresis of short polymers using non-equilibrium molecular dynamics simulations. More precisely, we consider polymer chains in a fluid containing a solute that has a concentration gradient and examine the variation of the induced diffusiophoretic velocity of the polymer chains as the interaction between the monomer and the solute is varied. We find that there is a non-monotonic relation between the diffusiophoretic mobility and the strength of the monomer-solute interaction. In addition, we find a weak dependence of the mobility on the length of the polymer chain, which shows clear difference from the diffusiophoresis of a solid particle. Interestingly, the hydrodynamic flow through the polymer is much less screened than for pressure driven flows.
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Affiliation(s)
- S Ramírez-Hinestrosa
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
| | - H Yoshida
- LPS, UMR CNRS 8550, École Normale Supérieure, 24 rue Lhomond, 75005 Paris, France
| | - L Bocquet
- LPS, UMR CNRS 8550, École Normale Supérieure, 24 rue Lhomond, 75005 Paris, France
| | - D Frenkel
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
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Klinov AV, Anashkin IP, Razinov AI, Minibaeva LR. Molecular Simulation of Pervaporation of a Lennard-Jones Mixture Using a Crystalline Membrane. THEORETICAL FOUNDATIONS OF CHEMICAL ENGINEERING 2019. [DOI: 10.1134/s0040579519040201] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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18
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Velioglu S, Keskin S. Simulation of H 2/CH 4 mixture permeation through MOF membranes using non-equilibrium molecular dynamics. JOURNAL OF MATERIALS CHEMISTRY. A 2019; 7:2301-2314. [PMID: 30931122 PMCID: PMC6395021 DOI: 10.1039/c8ta10167a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Accepted: 12/19/2018] [Indexed: 05/05/2023]
Abstract
Grand canonical Monte Carlo (GCMC) simulations are widely used with equilibrium molecular dynamics (EMD) to predict gas adsorption and diffusion in single-crystals of metal-organic frameworks (MOFs). Adsorption and diffusion data obtained from these simulations are then combined to predict gas permeabilities and selectivities of MOF membranes. This GCMC + EMD approach is highly useful to screen a large number of MOFs for a target membrane-based gas separation process. External field non-equilibrium molecular dynamics (NEMD) simulations, on the other hand, can directly compute gas permeation by providing an accurate representation of MOF membranes but they are computationally demanding and require long simulation times. In this work, we performed NEMD simulations to investigate H2/CH4 separation performances of MOF membranes. Both single-component and binary mixture permeabilities of H2 and CH4 were computed using the NEMD approach and results were compared with the predictions of the GCMC + EMD approach and experimental measurements reported in the literature. Our results showed that there is a good agreement between NEMD simulations and experiments for the permeability and selectivity of MOF membranes. NEMD simulations provided the direct observation of the mass transfer resistances on the pore mouth of MOF membranes, which is neglected in the GCMC + EMD approach. Our results suggested that once the very large numbers of MOF materials were screened using the GCMC + EMD approach, more detailed NEMD calculations can be performed for the best membrane candidates to unlock the actual gas transport mechanism before the experimental fabrication of MOF membranes.
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Affiliation(s)
- Sadiye Velioglu
- Department of Chemical and Biological Engineering , Koc University , Rumelifeneri Yolu, Sariyer , 34450 , Istanbul , Turkey . ; Tel: +90-212-338-1362
| | - Seda Keskin
- Department of Chemical and Biological Engineering , Koc University , Rumelifeneri Yolu, Sariyer , 34450 , Istanbul , Turkey . ; Tel: +90-212-338-1362
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19
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A Simple Molecular Kerogen Pore-Network Model for Transport Simulation in Condensed Phase Digital Source-Rock Physics. Transp Porous Media 2018. [DOI: 10.1007/s11242-018-1149-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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20
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Biernacki K, Sousa SF, Gales L, Ramos MJ, Magalhães AL. Transport Properties of Light Gases in Nanochannels of L-Leu-L-Ser Dipeptide Crystals: A Comparative Study by Molecular Dynamics Simulations. ChemistrySelect 2018. [DOI: 10.1002/slct.201800559] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Krzysztof Biernacki
- UCIBIO/REQUIMTE; Departamento de Química e Bioquímica; Faculdade de Ciências; Universidade do Porto, R. Campo Alegre s/n; 4169-007 Porto Portugal
| | - Sergio F. Sousa
- UCIBIO/REQUIMTE; Departamento de Química e Bioquímica; Faculdade de Ciências; Universidade do Porto, R. Campo Alegre s/n; 4169-007 Porto Portugal
| | - Luis Gales
- i3S, Instituto de Investigação e Inovação em Saúde/IBMC; Instituto de Biologia Molecular e Celular; Rua Alfredo Allen, 208, 4200-135, Porto; 4150-180 Portugal
- ICBAS; Instituto de Ciências Biomédicas Abel Salazar; Universidade do Porto, Rua de Jorge Viterbo Ferreira n.u 228; 4050-313, Porto Portugal
| | - Maria J. Ramos
- UCIBIO/REQUIMTE; Departamento de Química e Bioquímica; Faculdade de Ciências; Universidade do Porto, R. Campo Alegre s/n; 4169-007 Porto Portugal
| | - Alexandre L. Magalhães
- UCIBIO/REQUIMTE; Departamento de Química e Bioquímica; Faculdade de Ciências; Universidade do Porto, R. Campo Alegre s/n; 4169-007 Porto Portugal
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21
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Abstract
Dual control volume grand canonical molecular dynamics is used to perform the first calculation of fluid-fluid interfacial mobilities. The mobility is calculated from one-dimensional random walks of the interface by relating the diffusion coefficient to the interfacial mobility. Three different calculation methods are employed: one using the interfacial position variance as a function of time, one using the mean-squared interfacial displacement, and one using the time-autocorrelation of the interfacial velocity. The mobility is calculated for two liquid-liquid interfaces and one liquid-vapor interface to examine the robustness of the methods. Excellent agreement between the three calculation methods is shown for all the three interfaces, indicating that any of them could be used to calculate the interfacial mobility.
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Affiliation(s)
- Paul L Barclay
- Department of Mechanical Engineering and Applied Mechanics, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
| | - Jennifer R Lukes
- Department of Mechanical Engineering and Applied Mechanics, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
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22
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Rezlerová E, Zukal A, Čejka J, Siperstein FR, Brennan JK, Lísal M. Adsorption and Diffusion of C 1 to C 4 Alkanes in Dual-Porosity Zeolites by Molecular Simulations. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:11126-11137. [PMID: 28689411 DOI: 10.1021/acs.langmuir.7b01772] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
We employ grand canonical Monte Carlo and molecular dynamics simulations to systematically study the adsorption and diffusion of C1 to C4 alkanes in hierarchical ZSM-5 zeolite with micropores (∼1 nm) and mesopores (>2 nm). The zeolite is characterized by a large surface area of active sites on the microporous scale with high permeability and access to the active sites, which arises from the enhanced transport at the mesoporous scale. We model this zeolite as a microporous Na+-exchanged alumino-sillicate zeolite ZSM-5/35 (Si/Al = 35) in which cylindrical mesopores with a diameter of 4 nm have been built by deleting atoms accordingly. We use the TraPPE and Vujić-Lyubartsev force fields along with the Lorentz-Berthelot combining rules to describe adsorbate-adsorbate and adsorbate-adsorbent interactions. The performance of the force fields is assessed by comparing against experimental single-component adsorption isotherms of methane and ethane in microporous ZSM-5/35, which we measured as part of this work. We compare the adsorption isotherms and diffusivities of the adsorbed alkanes in the dual-porosity zeolite with those in microporous ZSM-5/35 and discern the specific behavior at each porosity scale on the overall adsorption, self-diffusion, and transport behavior in zeolites with dual micro/mesoporosities.
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Affiliation(s)
- Eliška Rezlerová
- Laboratory of Aerosols Chemistry and Physics, Institute of Chemical Process Fundamentals of the CAS , v. v. i., Prague, Czech Republic
- Department of Physics, Faculty of Science, J. E. Purkinje University , Ústí n. Labem, Czech Republic
| | - Arnošt Zukal
- J. Heyrovský Institute of Physical Chemistry of the CAS , v. v. i., Prague, Czech Republic
| | - Jiří Čejka
- J. Heyrovský Institute of Physical Chemistry of the CAS , v. v. i., Prague, Czech Republic
| | - Flor R Siperstein
- School of Chemical Engineering and Analytical Science, The University of Manchester , Oxford Road, Manchester, United Kingdom
| | - John K Brennan
- Weapons and Materials Research Directorate, U.S. Army Research Laboratory, Aberdeen Proving Ground, Maryland 21005, United States
| | - Martin Lísal
- Laboratory of Aerosols Chemistry and Physics, Institute of Chemical Process Fundamentals of the CAS , v. v. i., Prague, Czech Republic
- Department of Physics, Faculty of Science, J. E. Purkinje University , Ústí n. Labem, Czech Republic
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23
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Song Y, Xu F, Wei M, Wang Y. Water Flow inside Polamide Reverse Osmosis Membranes: A Non-Equilibrium Molecular Dynamics Study. J Phys Chem B 2017; 121:1715-1722. [DOI: 10.1021/acs.jpcb.6b11536] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yang Song
- State Key Laboratory of Materials-Oriented
Chemical Engineering, Jiangsu National Synergetic Innovation Center
for Advanced Materials, and College of Chemical Engineering, Nanjing Tech University, Nanjing 210009, Jiangsu, P. R. China
| | - Fang Xu
- State Key Laboratory of Materials-Oriented
Chemical Engineering, Jiangsu National Synergetic Innovation Center
for Advanced Materials, and College of Chemical Engineering, Nanjing Tech University, Nanjing 210009, Jiangsu, P. R. China
| | - Mingjie Wei
- State Key Laboratory of Materials-Oriented
Chemical Engineering, Jiangsu National Synergetic Innovation Center
for Advanced Materials, and College of Chemical Engineering, Nanjing Tech University, Nanjing 210009, Jiangsu, P. R. China
| | - Yong Wang
- State Key Laboratory of Materials-Oriented
Chemical Engineering, Jiangsu National Synergetic Innovation Center
for Advanced Materials, and College of Chemical Engineering, Nanjing Tech University, Nanjing 210009, Jiangsu, P. R. China
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24
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Dutta RC, Bhatia SK. Transport Diffusion of Light Gases in Polyethylene Using Atomistic Simulations. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:936-946. [PMID: 28036185 DOI: 10.1021/acs.langmuir.6b04037] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
We explore the temperature dependence of the self-, corrected-, and transport-diffusivities of CO2, CH4, and N2 in a polyethylene (PE) polymer membrane through equilibrium molecular dynamics simulations. We also investigate the morphology of the polymer membrane based on the intermolecular radial distribution function, free volume, and pore size distribution analysis. The results indicate the existence of 1.5-3 Å diameter pores in the PE membrane, and with the increase in the temperature, the polymer swells linearly with changing slope at 450 K in the absence of gas and exponentially in the presence of gas. The gas adsorption isotherms extracted via a two-step methodology, considering the dynamics and structural transitions in the polymer matrix upon gas adsorption, were fitted using a "two-mode sorption" model. Our results suggest that CO2 adsorbs strongly, whereas N2 shows weak adsorption in PE. The results demonstrate that CO2 is more soluble, whereas N2 is least soluble. Further, it is found that an increase in the temperature negatively impacts the solubility of CO2 and CH4 but positively for N2; this reverse solubility behavior is due to increased availability of pores accessible to N2, which are kinetically closed at the lowest temperatures. The reported self-diffusivities of the gases from our simulations are on the order of 10-6 cm2/s, consistent with the experimental evidence, whereas transport-diffusivities are 2 orders of magnitude higher than self-diffusivities. Furthermore, the temperature dependence of the self-diffusivity follows Arrhenius behavior, whereas the transport-diffusivity follows non-Arrhenius behavior having different activation energies in low and high temperature regions. Also, it is seen that loading has little effect on the self- and corrected-diffusion coefficients of all gases in the PE membrane.
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Affiliation(s)
- Ravi C Dutta
- School of Chemical Engineering, The University of Queensland , Brisbane, Queensland 4072, Australia
| | - Suresh K Bhatia
- School of Chemical Engineering, The University of Queensland , Brisbane, Queensland 4072, Australia
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25
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Barclay PL, Lukes JR. Mass-flow-rate-controlled fluid flow in nanochannels by particle insertion and deletion. Phys Rev E 2017; 94:063303. [PMID: 28085320 DOI: 10.1103/physreve.94.063303] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2016] [Indexed: 11/07/2022]
Abstract
A nonequilibrium molecular dynamics method to induce fluid flow in nanochannels, the insertion-deletion method (IDM), is introduced. IDM inserts and deletes particles within distinct regions in the domain, creating locally high and low pressures. The benefits of IDM are that it directly controls a physically meaningful quantity, the mass flow rate, allows for pressure and density gradients to develop in the direction of flow, and permits treatment of complex aperiodic geometries. Validation of IDM is performed, yielding good agreement with the analytical solution of Poiseuille flow in a planar channel. Comparison of IDM to existing methods indicates that it is best suited for gases, both because it intrinsically accounts for compressibility effects on the flow and because the computational cost of particle insertion is lowest for low-density fluids.
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Affiliation(s)
- Paul L Barclay
- Department of Mechanical Engineering and Applied Mechanics, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Jennifer R Lukes
- Department of Mechanical Engineering and Applied Mechanics, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
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26
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Yamashita K, Kashiwagi K, Agrawal A, Daiguji H. Grand canonical Monte Carlo and molecular dynamics simulations of capillary condensation and evaporation of water in hydrophilic mesopores. Mol Phys 2016. [DOI: 10.1080/00268976.2016.1262555] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Kyohei Yamashita
- Department of Mechanical Engineering, The University of Tokyo, Tokyo, Japan
| | - Kentaro Kashiwagi
- Department of Mechanical Engineering, The University of Tokyo, Tokyo, Japan
| | - Ankit Agrawal
- Department of Chemical Engineering, Indian Institute of Technology Kharagpur, West Bengal, India
| | - Hirofumi Daiguji
- Department of Mechanical Engineering, The University of Tokyo, Tokyo, Japan
- CREST, Japan Science and Technology Agency (JST), Tokyo, Japan
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27
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Affiliation(s)
- Suresh K. Bhatia
- Division of Chemical Engineering, University of Queensland, Brisbane QLD 4072, Australia
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28
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Chae K, Huang L. Computational study of pressure-driven methane transport in hierarchical nanostructured porous carbons. J Chem Phys 2016; 144:044708. [PMID: 26827229 DOI: 10.1063/1.4940427] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
Using the reflecting particle method together with a perturbation-relaxation loop developed in our previous work, we studied pressure-driven methane transport in hierarchical nanostructured porous carbons (HNPCs) containing both mesopores and micropores in non-equilibrium molecular dynamics simulations. The surface morphology of the mesopore wall was systematically varied by tuning interaction strength between carbon atoms and the template in a mimetic nanocasting process. Effects of temperature and mesopore size on methane transport in HNPCs were also studied. Our study shows that increased mesopore wall surface roughness changes the character of the gas-wall interaction from specular to diffuse, while the gas-gas interaction is diminished due to the decrease of adsorption density. Effects of the mesopore wall surface morphology are the most significant at low temperatures and in small channels. Our systematic study provides a better understanding of the transport mechanisms of light gases through carbon nanotube composite membranes in experiments.
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Affiliation(s)
- Kisung Chae
- Department of Materials Science and Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180, USA
| | - Liping Huang
- Department of Materials Science and Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180, USA
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29
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Wu T, Zhang D. Impact of Adsorption on Gas Transport in Nanopores. Sci Rep 2016; 6:23629. [PMID: 27020130 PMCID: PMC4810319 DOI: 10.1038/srep23629] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2016] [Accepted: 03/09/2016] [Indexed: 11/09/2022] Open
Abstract
Given the complex nature of the interaction between gas and solid atoms, the development of nanoscale science and technology has engendered a need for further understanding of gas transport behavior through nanopores and more tractable models for large-scale simulations. In the present paper, we utilize molecular dynamic simulations to demonstrate the behavior of gas flow under the influence of adsorption in nano-channels consisting of illite and graphene, respectively. The results indicate that velocity oscillation exists along the cross-section of the nano-channel, and the total mass flow could be either enhanced or reduced depending on variations in adsorption under different conditions. The mechanisms can be explained by the extra average perturbation stress arising from density oscillation via the novel perturbation model for micro-scale simulation, and approximated via the novel dual-region model for macro-scale simulation, which leads to a more accurate permeability correction model for industrial applications than is currently available.
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Affiliation(s)
- Tianhao Wu
- Department of Energy and Resources Engineering, College of Engineering, Peking University, Beijing 100871, China
| | - Dongxiao Zhang
- ERE & BIC-ESAT, College of Engineering, Peking University, Beijing 100871, China
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30
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Nichols JW, Wheeler DR. Fourier Correlation Method for Simulating Mutual Diffusion Coefficients in Condensed Systems at Equilibrium. Ind Eng Chem Res 2015. [DOI: 10.1021/acs.iecr.5b02849] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Joseph W. Nichols
- Department
of Chemical Engineering, Brigham Young University, Provo, Utah 84602, United States
| | - Dean R. Wheeler
- Department
of Chemical Engineering, Brigham Young University, Provo, Utah 84602, United States
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31
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Chae K, Huang L. Computational Study of Pressure-Driven Gas Transport in Nanostructured Carbons: An Alternative Approach. J Phys Chem B 2015; 119:12299-307. [PMID: 26309067 DOI: 10.1021/acs.jpcb.5b05464] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We demonstrated a computationally efficient method in nonequilibrium molecular dynamics (NEMD) simulations to study pressure-driven gas transport in porous media. The reflecting particle method (RPM)14 was used to establish a steady-state gas flow along the transport channel, and the gas density in the feed chamber was properly adjusted to allow a constant pressure drop under various conditions by using a perturbation-relaxation loop developed here. This method was validated for methane flow through carbon nanotubes over a wide range of temperatures, giving results comparable to those of the commonly used dual control volume grand canonical molecular dynamics (DCV-GCMD) method but at least 20 times more efficient, even though the transport condition tested is favorable for the latter. This made it possible to perform systematic studies on the effects of temperature, pressure, and channel size on the transport behaviors. Our study shows that adsorption density varies significantly with temperature, which dramatically influences the transport mechanisms, especially in small channels at low temperatures and under high pressures. This newly developed NEMD method can be readily extended to study gas transport through channels with more complex surface morphology.
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Affiliation(s)
- Kisung Chae
- Department of Materials Science and Engineering, Rensselaer Polytechnic Institute , Troy, New York 12180, United States
| | - Liping Huang
- Department of Materials Science and Engineering, Rensselaer Polytechnic Institute , Troy, New York 12180, United States
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32
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Boţan A, Ulm FJ, Pellenq RJM, Coasne B. Bottom-up model of adsorption and transport in multiscale porous media. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2015; 91:032133. [PMID: 25871080 DOI: 10.1103/physreve.91.032133] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2014] [Indexed: 06/04/2023]
Abstract
We develop a model of transport in multiscale porous media which accounts for adsorption in the different porosity scales. This model employs statistical mechanics to upscale molecular simulation and describe adsorption and transport at larger time and length scales. Using atom-scale simulations, which capture the changes in adsorption and transport with temperature, pressure, pore size, etc., this approach does not assume any adsorption or flow type. Moreover, by relating the local chemical potential μ(r) and density ρ(r), the present model accounts for adsorption effects and possible changes in the confined fluid state upon transport. This model constitutes a bottom-up framework of adsorption and transport in multiscale materials as it (1) describes the adsorption-transport interplay, (2) accounts for the hydrodynamics breakdown at the nm scale, and (3) is multiscale.
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Affiliation(s)
- Alexandru Boţan
- MultiScale Materials Science for Energy and Environment, UMI 3466 CNRS-MIT, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA and Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA
| | - Franz-Josef Ulm
- MultiScale Materials Science for Energy and Environment, UMI 3466 CNRS-MIT, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA and Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA
| | - Roland J-M Pellenq
- MultiScale Materials Science for Energy and Environment, UMI 3466 CNRS-MIT, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA and Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA
| | - Benoit Coasne
- MultiScale Materials Science for Energy and Environment, UMI 3466 CNRS-MIT, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA and Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA
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33
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Daly KB, Benziger JB, Panagiotopoulos AZ, Debenedetti PG. Molecular Dynamics Simulations of Water Permeation across Nafion Membrane Interfaces. J Phys Chem B 2014; 118:8798-807. [DOI: 10.1021/jp5024718] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kevin B. Daly
- Department of Chemical and
Biological Engineering, Princeton University, Princeton, New Jersey 08544, United States
| | - Jay B. Benziger
- 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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34
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Factorovich MH, Molinero V, Scherlis DA. Vapor Pressure of Water Nanodroplets. J Am Chem Soc 2014; 136:4508-14. [DOI: 10.1021/ja405408n] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Matías H. Factorovich
- Departamento
de Química Inorgánica, Analítica y Química
Física/INQUIMAE, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pab. II, Buenos Aires, C1428EHA Argentina
| | - Valeria Molinero
- Department
of Chemistry, The University of Utah, 315 South 1400 East, Salt Lake City, Utah 84112-0850, United States
| | - Damián A. Scherlis
- Departamento
de Química Inorgánica, Analítica y Química
Física/INQUIMAE, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pab. II, Buenos Aires, C1428EHA Argentina
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35
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Factorovich MH, Molinero V, Scherlis DA. A simple grand canonical approach to compute the vapor pressure of bulk and finite size systems. J Chem Phys 2014; 140:064111. [DOI: 10.1063/1.4865137] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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36
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Rizzi F, Jones RE, Debusschere BJ, Knio OM. Uncertainty quantification in MD simulations of concentration driven ionic flow through a silica nanopore. I. Sensitivity to physical parameters of the pore. J Chem Phys 2013; 138:194104. [PMID: 23697406 DOI: 10.1063/1.4804666] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
In this article, uncertainty quantification is applied to molecular dynamics (MD) simulations of concentration driven ionic flow through a silica nanopore. We consider a silica pore model connecting two reservoirs containing a solution of sodium (Na(+)) and chloride (Cl(-)) ions in water. An ad hoc concentration control algorithm is developed to simulate a concentration driven counter flow of ions through the pore, with the ionic flux being the main observable extracted from the MD system. We explore the sensitivity of the system to two physical parameters of the pore, namely, the pore diameter and the gating charge. First we conduct a quantitative analysis of the impact of the pore diameter on the ionic flux, and interpret the results in terms of the interplay between size effects and ion mobility. Second, we analyze the effect of gating charge by treating the charge density over the pore surface as an uncertain parameter in a forward propagation study. Polynomial chaos expansions and Bayesian inference are exploited to isolate the effect of intrinsic noise and quantify the impact of parametric uncertainty on the MD predictions. We highlight the challenges arising from the heterogeneous nature of the system, given the several components involved, and from the substantial effect of the intrinsic thermal noise.
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Affiliation(s)
- F Rizzi
- Department of Mechanical Engineering, Johns Hopkins University, Baltimore, Maryland 21218, USA
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37
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Coasne B, Galarneau A, Gerardin C, Fajula F, Villemot F. Molecular simulation of adsorption and transport in hierarchical porous materials. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:7864-7875. [PMID: 23718554 DOI: 10.1021/la401228k] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Adsorption and transport in hierarchical porous solids with micro- (~1 nm) and mesoporosities (>2 nm) are investigated by molecular simulation. Two models of hierarchical solids are considered: microporous materials in which mesopores are carved out (model A) and mesoporous materials in which microporous nanoparticles are inserted (model B). Adsorption isotherms for model A can be described as a linear combination of the adsorption isotherms for pure mesoporous and microporous solids. In contrast, adsorption in model B departs from adsorption in pure microporous and mesoporous solids; the inserted microporous particles act as defects, which help nucleate the liquid phase within the mesopore and shift capillary condensation toward lower pressures. As far as transport under a pressure gradient is concerned, the flux in hierarchical materials consisting of microporous solids in which mesopores are carved out obeys the Navier-Stokes equation so that Darcy's law is verified within the mesopore. Moreover, the flow in such materials is larger than in a single mesopore, due to the transfer between micropores and mesopores. This nonzero velocity at the mesopore surface implies that transport in such hierarchical materials involves slippage at the mesopore surface, although the adsorbate has a strong affinity for the surface. In contrast to model A, flux in model B is smaller than in a single mesopore, as the nanoparticles act as constrictions that hinder transport. By a subtle effect arising from fast transport in the mesopores, the presence of mesopores increases the number of molecules in the microporosity in hierarchical materials and, hence, decreases the flow in the micropores (due to mass conservation). As a result, we do not observe faster diffusion in the micropores of hierarchical materials upon flow but slower diffusion, which increases the contact time between the adsorbate and the surface of the microporosity.
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Affiliation(s)
- Benoit Coasne
- Institut Charles Gerhardt Montpellier, CNRS (UMR 5253), Université Montpellier 2, ENSCM, Université Montpellier 1, 8 rue de l'Ecole Normale, 34296 Montpellier Cedex 05, France.
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38
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Lim YI. State-of-arts in Multiscale Simulation for Process Development. KOREAN CHEMICAL ENGINEERING RESEARCH 2013. [DOI: 10.9713/kcer.2013.51.1.10] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Ható Z, Boda D, Kristóf T. Simulation of steady-state diffusion: Driving force ensured by dual control volumes or local equilibrium Monte Carlo. J Chem Phys 2012; 137:054109. [DOI: 10.1063/1.4739255] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Frentrup H, Avendaño C, Horsch M, Salih A, Müller EA. Transport diffusivities of fluids in nanopores by non-equilibrium molecular dynamics simulation. MOLECULAR SIMULATION 2012. [DOI: 10.1080/08927022.2011.636813] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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Velichko YS, Mantei JR, Bitton R, Carvajal D, Shull KR, Stupp SI. Electric Field Controlled Self-Assembly of Hierarchically Ordered Membranes. ADVANCED FUNCTIONAL MATERIALS 2012; 22:369-377. [PMID: 23166533 PMCID: PMC3500089 DOI: 10.1002/adfm.201101538] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Self-assembly in the presence of external forces is an adaptive, directed organization of molecular components under nonequilibrium conditions. While forces may be generated as a result of spontaneous interactions among components of a system, intervention with external forces can significantly alter the final outcome of self-assembly. Superimposing these intrinsic and extrinsic forces provides greater degrees of freedom to control the structure and function of self-assembling materials. In this work we investigate the role of electric fields during the dynamic self-assembly of a negatively charged polyelectrolyte and a positively charged peptide amphiphile in water leading to the formation of an ordered membrane. In the absence of electric fields, contact between the two solutions of oppositely charged molecules triggers the growth of closed membranes with vertically oriented fibrils that encapsulate the polyelectrolyte solution. This process of self-assembly is intrinsically driven by excess osmotic pressure of counterions, and the electric field is found to modify the kinetics of membrane formation, and also its morphology and properties. Depending on the strength and orientation of the field we observe a significant increase or decrease of up to nearly 100% in membrane thickness, as well as the controlled rotation of nanofiber growth direction by 90 degrees, resulting in a significant increase in mechanical stiffness. These results suggest the possibility of using electric fields to control structure in self-assembly processes involving diffusion of oppositely charged molecules.
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Affiliation(s)
- Yuri S. Velichko
- Department of Materials Science and Engineering, Northwestern University, 2220 Campus Drive, Evanston, Illinois 60208
| | - Jason R. Mantei
- Department of Materials Science and Engineering, Northwestern University, 2220 Campus Drive, Evanston, Illinois 60208
| | - Ronit Bitton
- Institute for BioNanotechnology in Medicine, Northwestern University, Chicago, Illinois 60611
| | - Daniel Carvajal
- Department of Materials Science and Engineering, Northwestern University, 2220 Campus Drive, Evanston, Illinois 60208
| | - Kenneth R. Shull
- Department of Materials Science and Engineering, Northwestern University, 2220 Campus Drive, Evanston, Illinois 60208
| | - Samuel I. Stupp
- Department of Materials Science and Engineering, Northwestern University, 2220 Campus Drive, Evanston, Illinois 60208
- Department of Chemistry, Northwestern University, 2220 Campus Drive, Evanston, Illinois 60208
- Department of Medicine, Northwestern University, 2220 Campus Drive, Evanston, Illinois 60208
- Institute for BioNanotechnology in Medicine, Northwestern University, Chicago, Illinois 60611
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Huang C, Choi PYK, Kostiuk LW. A method for creating a non-equilibrium NT(P1−P2) ensemble in molecular dynamics simulation. Phys Chem Chem Phys 2011; 13:20750-9. [DOI: 10.1039/c1cp21492f] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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Maginn EJ, Elliott JR. Historical Perspective and Current Outlook for Molecular Dynamics As a Chemical Engineering Tool. Ind Eng Chem Res 2010. [DOI: 10.1021/ie901898k] [Citation(s) in RCA: 88] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- E. J. Maginn
- Department of Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame, Indiana 46556, Department of Chemical and Biomolecular Engineering, University of Akron, Akron, Ohio 44325-3906
| | - J. R. Elliott
- Department of Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame, Indiana 46556, Department of Chemical and Biomolecular Engineering, University of Akron, Akron, Ohio 44325-3906
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Molecular pore-network model for nanoporous materials. II: Application to transport and separation of gaseous mixtures in silicon-carbide membranes. J Memb Sci 2009. [DOI: 10.1016/j.memsci.2009.09.019] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Hao S, Sholl DS. Self-diffusion and macroscopic diffusion of hydrogen in amorphous metals from first-principles calculations. J Chem Phys 2009; 130:244705. [DOI: 10.1063/1.3158619] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
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Santander JE, Conner WC, Jobic H, Auerbach SM. Simulating Microwave-Heated Open Systems: Tuning Competitive Sorption in Zeolites. J Phys Chem B 2009; 113:13776-81. [DOI: 10.1021/jp902946g] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Julian E. Santander
- Department of Chemistry, University of Massachusetts, Amherst, Massachusetts 01003, Department of Chemical Engineering, University of Massachusetts, Amherst, Massachusetts 01003, and Institut de Recherches sur la Catalyse, Ecole Normale Superiore de Lyon, France
| | - W. Curtis Conner
- Department of Chemistry, University of Massachusetts, Amherst, Massachusetts 01003, Department of Chemical Engineering, University of Massachusetts, Amherst, Massachusetts 01003, and Institut de Recherches sur la Catalyse, Ecole Normale Superiore de Lyon, France
| | - Hervé Jobic
- Department of Chemistry, University of Massachusetts, Amherst, Massachusetts 01003, Department of Chemical Engineering, University of Massachusetts, Amherst, Massachusetts 01003, and Institut de Recherches sur la Catalyse, Ecole Normale Superiore de Lyon, France
| | - Scott M. Auerbach
- Department of Chemistry, University of Massachusetts, Amherst, Massachusetts 01003, Department of Chemical Engineering, University of Massachusetts, Amherst, Massachusetts 01003, and Institut de Recherches sur la Catalyse, Ecole Normale Superiore de Lyon, France
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Thompho S, Chanajaree R, Remsungnen T, Hannongbua S, Bopp PA, Fritzsche S. The Permeation of Methane Molecules through Silicalite-1 Surfaces. J Phys Chem A 2009; 113:2004-14. [DOI: 10.1021/jp808588n] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Somphob Thompho
- Institut für Theoretische Physik, Universität Leipzig, Vor dem Hospitaltore 1, D-04103 Leipzig, Germany, Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand, Department of Mathematics, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand, and Department of Chemistry, Université Bordeaux 1, Building A12, 351 Cours de la Libération, F-33405 Talence CEDEX, France
| | - Rungroj Chanajaree
- Institut für Theoretische Physik, Universität Leipzig, Vor dem Hospitaltore 1, D-04103 Leipzig, Germany, Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand, Department of Mathematics, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand, and Department of Chemistry, Université Bordeaux 1, Building A12, 351 Cours de la Libération, F-33405 Talence CEDEX, France
| | - Tawun Remsungnen
- Institut für Theoretische Physik, Universität Leipzig, Vor dem Hospitaltore 1, D-04103 Leipzig, Germany, Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand, Department of Mathematics, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand, and Department of Chemistry, Université Bordeaux 1, Building A12, 351 Cours de la Libération, F-33405 Talence CEDEX, France
| | - Supot Hannongbua
- Institut für Theoretische Physik, Universität Leipzig, Vor dem Hospitaltore 1, D-04103 Leipzig, Germany, Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand, Department of Mathematics, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand, and Department of Chemistry, Université Bordeaux 1, Building A12, 351 Cours de la Libération, F-33405 Talence CEDEX, France
| | - Philippe A. Bopp
- Institut für Theoretische Physik, Universität Leipzig, Vor dem Hospitaltore 1, D-04103 Leipzig, Germany, Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand, Department of Mathematics, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand, and Department of Chemistry, Université Bordeaux 1, Building A12, 351 Cours de la Libération, F-33405 Talence CEDEX, France
| | - Siegfried Fritzsche
- Institut für Theoretische Physik, Universität Leipzig, Vor dem Hospitaltore 1, D-04103 Leipzig, Germany, Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand, Department of Mathematics, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand, and Department of Chemistry, Université Bordeaux 1, Building A12, 351 Cours de la Libération, F-33405 Talence CEDEX, France
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WU Z, LIU Z, WANG W, FAN Y, XU N. Diffusion of H2, CO, N2, O2 and CH4 Through Nanoporous Carbon Membranes. Chin J Chem Eng 2008. [DOI: 10.1016/s1004-9541(08)60144-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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