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Zhang HD, Li XD, Xie YY, Yang PH, Yu JX. High throughput screening of pure silica zeolites for CF 4 capture from electronics industry gas. Phys Chem Chem Phys 2024; 26:11570-11581. [PMID: 38533820 DOI: 10.1039/d4cp00171k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/28/2024]
Abstract
The capture and separation of CF4 from CF4/N2 mixture gas is a crucial issue in the electronics industry, as CF4 is a commonly used etching gas and the ratio of CF4 to N2 directly affects process efficiency. Utilizing high-throughput computational screening techniques and grand canonical Monte Carlo (GCMC) simulations, we comprehensively screened and assessed 247 types of pure silicon zeolite materials to determine their adsorption and separation performance for CF4/N2 mixtures. Based on screening, the relationships between the structural parameters and adsorption and separation properties were meticulously investigated. Four indicators including adsorption selectivity, working capacity, adsorbent performance score (APS), and regenerability (R%) were used to evaluate the performance of adsorbents. Based on the evaluation, we selected the top three best-performing zeolite structures for vacuum swing adsorption (LEV, AWW and ESV) and pressure swing adsorption (AVL, ZON, and ERI) processes respectively. Also, we studied the preferable adsorption sites of CF4 and N2 in the selected zeolite structures through centroid density distributions at the molecule level. We expect the study may provide some valuable guidance for subsequent experimental investigations on adsorption and separation of CF4/N2.
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Affiliation(s)
- Hui-Dong Zhang
- College of Science, Henan University of Technology, Zhengzhou 450001, China.
| | - Xiao-Dong Li
- College of Science, Henan University of Technology, Zhengzhou 450001, China.
| | - Yan-Yu Xie
- College of Science, Henan University of Technology, Zhengzhou 450001, China.
| | - Peng-Hui Yang
- College of Science, Henan University of Technology, Zhengzhou 450001, China.
| | - Jing-Xin Yu
- College of Science, Henan University of Technology, Zhengzhou 450001, China.
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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
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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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Peng X, Vicent-Luna JM, Jin Q. Separation of CF 4/N 2, C 2F 6/N 2, and SF 6/N 2 Mixtures in Amorphous Activated Carbons Using Molecular Simulations. ACS APPLIED MATERIALS & INTERFACES 2020; 12:20044-20055. [PMID: 32270994 DOI: 10.1021/acsami.0c01043] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The capture and separation of CF4, C2F6, and SF6 and their mixtures containing nitrogen is a challenging process. To solve this, we propose the use of saccharose coke-based carbons as membranes for the adsorption and separation of these gases. By means of advanced techniques of Monte Carlo and molecular dynamics simulations, we have studied the adsorption and diffusion of CF4, C2F6, and SF6 as well as their mixtures with nitrogen in three HRMC carbon models, namely, CS400, CS1000, and CS1000a. We have computed the adsorption isotherms of the single components and the heat of adsorption as a function of the adsorbed concentration. We have also calculated the competitive adsorption of fluoride molecules and nitrogen at two different molar fractions, 0.1 and 0.9. We have computed the transport properties of the adsorbed gases in terms of the self-diffusivities and corrected diffusivities. The performance of the membranes for the targeted separations has been characterized by the calculation of the permselectivity. Our results indicate that the activated amorphous carbon CS1000a is an efficient adsorbent for the capture of the fluoride adsorbates as well as their purification from nitrogen-based mixtures.
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Affiliation(s)
- Xuan Peng
- College of Information Science and Technology, Beijing University of Chemical Technology, Beijing 100029, PR China
| | - Jose Manuel Vicent-Luna
- Department of Physical, Chemical and Natural Systems, Universidad Pablo de Olavide, Ctra. Utrera Km 1, Seville ES-41013, Spain
- Center for Computational Energy Research, Department of Applied Physics, Eindhoven University of Technology, Eindhoven 5600 MB, The Netherlands
| | - Qibing Jin
- College of Information Science and Technology, Beijing University of Chemical Technology, Beijing 100029, PR China
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Zheng YT, Xuan FZ, Wang Z. A dominant role of stress-dependent oxide structure on diffusion flux in the strain-reaction engineering. Chem Phys Lett 2015. [DOI: 10.1016/j.cplett.2015.01.036] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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5
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Ackerman DM, Skoulidas AI, Sholl DS, Karl Johnson J. Diffusivities of Ar and Ne in Carbon Nanotubes. MOLECULAR SIMULATION 2011. [DOI: 10.1080/0892702031000103239] [Citation(s) in RCA: 115] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- David M. Ackerman
- a Department of Chemical and Petroleum Engineering , University of Pittsburgh , 15261 , Pittsburgh , PA , USA
| | - Anastasios I. Skoulidas
- b Department of Chemical Engineering , Carnegie Mellon University , 15213 , Pittsburgh , PA , USA
| | - David S. Sholl
- c National Energy Technology Laboratory , 15236 , Pittsburgh , PA , USA
| | - J. Karl Johnson
- d Department of Chemistry , Imperial College of Science Technology and Medicine , SWAY, 7 2 , South Kensington , UK
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8
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Willmore FT, Wang XY, Sanchez IC. Gas diffusion in glasses via a probabilistic molecular dynamics. J Chem Phys 2007; 126:234502. [PMID: 17600420 DOI: 10.1063/1.2737052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
A probabilistic protocol which makes possible the calculation of the diffusivity of light gases in amorphous materials from limited Monte Carlo and molecular dynamics data is presented. Diffusion coefficients are calculated for helium and methane in polystyrene, and for helium, neon, and methane in three pairs of polysulfone isomers. Results include diffusion coefficients as small as 10(-9) cm2/s and are in good agreement with results obtained from traditional molecular dynamics and with available experimental data.
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Affiliation(s)
- Frank T Willmore
- Department of Chemical Engineering, University of Texas at Austin, Austin, Texas 78712, USA
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9
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Molecular dynamics simulations of transport and separation of supercritical carbon dioxide-alkane mixtures in supported membranes. Chem Eng Sci 2007. [DOI: 10.1016/j.ces.2007.02.026] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Kim S, Chen L, Johnson JK, Marand E. Polysulfone and functionalized carbon nanotube mixed matrix membranes for gas separation: Theory and experiment. J Memb Sci 2007. [DOI: 10.1016/j.memsci.2007.02.028] [Citation(s) in RCA: 261] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Abstract
Micro- and macroscale investigations have shown that colliding drops always coalesce for small values of the Weber number We = rhoU2d/sigma. Our molecular dynamic simulations show that nanojets always recoil following head-on collision even though We --> 0. The duration between collision and recoil is a function of the nanojet impact velocity Uo and the nature of intermolecular interactions. Evaporation, which promotes mixing, occurs during recoil and is enhanced by reducing intermolecular interactions. Thereafter, mixing occurs through diffusion. The mixing dynamics are independent of Uo and the orifice shape. Consistent with a continuum analysis, the characteristic nanojet diameter at stagnation ds,1 proportional to Uo, recoil time following collision tau proportional to Uo-2, and the number of evaporating molecules N proportional to Uo.
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Affiliation(s)
- Sohail Murad
- Department of Chemical Engineering, University of Illinois at Chicago, Chicago, Illinois 60607, USA
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Jakobtorweihen S, Lowe CP, Keil FJ, Smit B. A novel algorithm to model the influence of host lattice flexibility in molecular dynamics simulations: Loading dependence of self-diffusion in carbon nanotubes. J Chem Phys 2006; 124:154706. [PMID: 16674250 DOI: 10.1063/1.2185619] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
We describe a novel algorithm that includes the effect of host lattice flexibility into molecular dynamics simulations that use rigid lattices. It uses a Lowe-Andersen thermostat for interface-fluid collisions to take the most important aspects of flexibility into account. The same diffusivities and other properties of the flexible framework system are reproduced at a small fraction of the computational cost of an explicit simulation. We study the influence of flexibility on the self-diffusion of simple gases inside single walled carbon nanotubes. Results are shown for different guest molecules (methane, helium, and sulfur hexafluoride), temperatures, and types of carbon nanotubes. We show, surprisingly, that at low loadings flexibility is always relevant. Notably, it has a crucial influence on the diffusive dynamics of the guest molecules.
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Affiliation(s)
- S Jakobtorweihen
- Chemical Reaction Engineering, Hamburg University of Technology, Eissendorfer Strasse 38, D-21073 Hamburg, Germany.
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Krishna R, van Baten JM. Describing Binary Mixture Diffusion in Carbon Nanotubes with the Maxwell−Stefan Equations. An Investigation Using Molecular Dynamics Simulations. Ind Eng Chem Res 2006. [DOI: 10.1021/ie051126d] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- R. Krishna
- Van't Hoff Institute for Molecular Sciences, University of Amsterdam, Nieuwe Achtergracht 166, 1018 WV Amsterdam, The Netherlands
| | - J. M. van Baten
- Van't Hoff Institute for Molecular Sciences, University of Amsterdam, Nieuwe Achtergracht 166, 1018 WV Amsterdam, The Netherlands
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Marmier A, Spohr H, Cooke DJ, Kerisit S, Brodholt JP, Wilson PB, Parker SC. Self diffusion of argon in flexible, single wall, carbon nanotubes. MOLECULAR SIMULATION 2005. [DOI: 10.1080/08927020500066338] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Roth M, Mesentseva J. Atomistic Simulations of Rare Gas Transport through Breathable Single-wall Nanotubes with Constrictions and Knees. MOLECULAR SIMULATION 2004. [DOI: 10.1080/08927020410001722276] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Arora G, Wagner NJ, Sandler SI. Adsorption and diffusion of molecular nitrogen in single wall carbon nanotubes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2004; 20:6268-6277. [PMID: 15248712 DOI: 10.1021/la036432f] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Using molecular simulation, the adsorption and self-diffusion of diatomic nitrogen molecules inside a single wall carbon nanotube have been studied over a range of nanotube diameters (8.61-15.66 A) and loadings at temperatures of 100 and 298 K. Nitrogen adsorption energy is found to increase as the nanotube diameter is reduced toward the molecular diameter of nitrogen. A discrete organization of the nitrogen into adsorbed layers is observed at high loadings that follows a regular progression determined primarily by geometric considerations. The formation of an adsorbate core at the center of the nanotube is found to increase the self-diffusion of nitrogen. A "wormlike" phase is found for the adsorbed nitrogen in the (15, 0) carbon nanotube at high loadings and at 100 K.
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Affiliation(s)
- Gaurav Arora
- Center for Molecular and Engineering Thermodynamics, Department of Chemical Engineering, University of Delaware, Newark, Delaware 19716, USA
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Firouzi M, Tsotsis TT, Sahimi M. Nonequilibrium molecular dynamics simulations of transport and separation of supercritical fluid mixtures in nanoporous membranes. I. Results for a single carbon nanopore. J Chem Phys 2003. [DOI: 10.1063/1.1605373] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Düren T, Jakobtorweihen S, Keil FJ, Seaton NA. Grand canonical molecular dynamics simulations of transport diffusion in geometrically heterogeneous pores. Phys Chem Chem Phys 2003. [DOI: 10.1039/b207843k] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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DÜREN TINA, KEIL FRERICHJ, SEATON NIGELA. Molecular simulation of adsorption and transport diffusion of model fluids in carbon nanotubes. Mol Phys 2002. [DOI: 10.1080/0026897021000028429] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Skoulidas AI, Ackerman DM, Johnson JK, Sholl DS. Rapid transport of gases in carbon nanotubes. PHYSICAL REVIEW LETTERS 2002; 89:185901. [PMID: 12398618 DOI: 10.1103/physrevlett.89.185901] [Citation(s) in RCA: 339] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2002] [Indexed: 05/24/2023]
Abstract
We report atomistic simulations for both self- and transport diffusivities of light gases in carbon nanotubes and in two zeolites with comparable pore sizes. We find that transport rates in nanotubes are orders of magnitude faster than in the zeolites we have studied or in any microporous material for which experimental data are available. The exceptionally high transport rates in nanotubes are shown to be a result of the inherent smoothness of the nanotubes. We predict that carbon nanotube membranes will have fluxes that are orders of magnitude greater than crystalline zeolite membranes.
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Affiliation(s)
- Anastasios I Skoulidas
- Department of Chemical Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
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