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Keyvanloo Z, Nakhaei Pour A, Moosavi F, Kamali Shahri SM. Molecular dynamic simulation studies of adsorption and diffusion behaviors of methanol and ethanol through ZSM-5 zeolite. J Mol Graph Model 2021; 110:108048. [PMID: 34656942 DOI: 10.1016/j.jmgm.2021.108048] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2021] [Revised: 10/08/2021] [Accepted: 10/08/2021] [Indexed: 12/15/2022]
Abstract
Due to the importance of synthesis gas's entire conversion to methanol, the separation of methanol from unconverted synthesis gas is an industrial challenge. In this work, the influence of temperature, guest molecules concentrations (methanol and ethanol), and acid site density (Si/Al) of zeolites on the diffusion of methanol and ethanol, pure and binary mixture (80% methanol and 20% ethanol) in silicalite-1 and HZSM-5 (Si/Al = 47 and 23) were studied by using of the COMPASS force-field molecular dynamics method. Also, the adsorption of pure methanol and ethanol and binary mixture through these zeolites has been studied by using the Grand Canonical Monte Carlo (GCMC) method. The calculated adsorption rate and isosteric heat of adsorption for ethanol are lower and higher than methanol, respectively. The results of the binary mixture show that HZSM-5 (Si/Al = 23) has the lowest adsorption selectivity and most diffusion selectivity. The calculated diffusion coefficients of methanol and ethanol guest molecules decreased with rising guest molecule concentration and Si/Al-ratios. The effect of both agents was investigated by analysis of mean square displacement (MSD) and RDF diagram.
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Affiliation(s)
- Zahra Keyvanloo
- Department of Chemistry, Faculty of Science, Ferdowsi University of Mashhad, Mashhad, Iran
| | - Ali Nakhaei Pour
- Department of Chemistry, Faculty of Science, Ferdowsi University of Mashhad, Mashhad, Iran.
| | - Fatemeh Moosavi
- Department of Chemistry, Faculty of Science, Ferdowsi University of Mashhad, Mashhad, Iran
| | - Seyed Mehdi Kamali Shahri
- Department of Chemical Engineering, Pennsylvania State University, State College, PA, 16801, United States
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2
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Martins VFD, Ribeiro AM, Chang JS, Loureiro JM, Ferreira A, Rodrigues AE. Towards polymer grade ethylene production with Cu-BTC: gas-phase SMB versus PSA. ADSORPTION 2018. [DOI: 10.1007/s10450-017-9930-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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3
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A Discussion about Surface Diffusion Mechanism for the Adsorption of Basic Green 4 Dye on to Various Nano Structured Carbon Materials. E-JOURNAL OF SURFACE SCIENCE AND NANOTECHNOLOGY 2016. [DOI: 10.1380/ejssnt.2016.165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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4
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Rahimi M, Babu DJ, Singh JK, Yang YB, Schneider JJ, Müller-Plathe F. Double-walled carbon nanotube array for CO2 and SO2 adsorption. J Chem Phys 2015; 143:124701. [PMID: 26429026 DOI: 10.1063/1.4929609] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Grand-canonical Monte Carlo simulations and adsorption experiments are combined to find the optimized carbon nanotube (CNT) arrays for gas adsorption at low pressures and 303 K. Bundles of 3D aligned double-walled carbon nanotube (DWCNT) with inner diameter of 8 nm and different intertube distances were made experimentally. The experimental results show that decreasing intertube distance leads to a significant enhancement in carbon-dioxide (CO2) adsorption capacity at 1 bar. The molecular simulation study on CO2 adsorption onto bundles of 3D aligned DWCNT with inner diameters of 1, 3, and 8 nm and intertube distance of 0-15 nm shows that the intertube distance plays a more important role than the CNT diameter. The simulation results show that decreasing the intertube distance up to 1 nm increases the excess adsorption generally in all the studied systems at pressures 0 < p < 14 bars (the increase can be up to ∼40% depending on the system and pressure). This is in agreement with the experimental result. Further reduction in intertube distance leads to a decrease in the excess adsorption in the pressure range 9 < p < 14 bars. However, at lower pressure, 0 < p < 9 bars, intertube distance of 0.5 nm is found to have the highest excess adsorption. This result is indifferent to tube diameter. Furthermore, molecular simulations are conducted to obtain the optimal parameters, for the DWCNT bundle, for SO2 adsorption, which are similar to those observed for CO2 in the pressure range 0 < p < 3 bars.
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Affiliation(s)
- Mahshid Rahimi
- Eduard-Zintl-Institut für Anorganische und Physikalische Chemie, Technische Universität Darmstadt, Alarich-Weiss-Str. 4, D-64287 Darmstadt, Germany
| | - Deepu J Babu
- Eduard-Zintl-Institut für Anorganische und Physikalische Chemie, Technische Universität Darmstadt, Alarich-Weiss-Str. 4, D-64287 Darmstadt, Germany
| | - Jayant K Singh
- Eduard-Zintl-Institut für Anorganische und Physikalische Chemie, Technische Universität Darmstadt, Alarich-Weiss-Str. 4, D-64287 Darmstadt, Germany
| | - Yong-Biao Yang
- Eduard-Zintl-Institut für Anorganische und Physikalische Chemie, Technische Universität Darmstadt, Alarich-Weiss-Str. 4, D-64287 Darmstadt, Germany
| | - Jörg J Schneider
- Eduard-Zintl-Institut für Anorganische und Physikalische Chemie, Technische Universität Darmstadt, Alarich-Weiss-Str. 4, D-64287 Darmstadt, Germany
| | - Florian Müller-Plathe
- Eduard-Zintl-Institut für Anorganische und Physikalische Chemie, Technische Universität Darmstadt, Alarich-Weiss-Str. 4, D-64287 Darmstadt, Germany
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St-Pierre J, Virji MBV. Cell performance distribution in a low-temperature proton exchange membrane fuel cell stack during propene contamination. J APPL ELECTROCHEM 2015. [DOI: 10.1007/s10800-015-0896-y] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Zöttl S, Kaiser A, Daxner M, Goulart M, Mauracher A, Probst M, Hagelberg F, Denifl S, Scheier P, Echt O. Ordered phases of ethylene adsorbed on charged fullerenes and their aggregates. CARBON 2014; 69:206-220. [PMID: 25843960 PMCID: PMC4375791 DOI: 10.1016/j.carbon.2013.12.017] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2013] [Accepted: 12/03/2013] [Indexed: 06/03/2023]
Abstract
In spite of extensive investigations of ethylene adsorbed on graphite, bundles of nanotubes, and crystals of fullerenes, little is known about the existence of commensurate phases; they have escaped detection in almost all previous work. Here we present a combined experimental and theoretical study of ethylene adsorbed on free C60 and its aggregates. The ion yield of [Formula: see text] measured by mass spectrometry reveals a propensity to form a structurally ordered phase on monomers, dimers and trimers of C60 in which all sterically accessible hollow sites over carbon rings are occupied. Presumably the enhancement of the corrugation by the curvature of the fullerene surface favors this phase which is akin to a hypothetical 1 × 1 phase on graphite. Experimental data also reveal the number of molecules in groove sites of the C60 dimer through tetramer. The identity of the sites, adsorption energies and orientations of the adsorbed molecules are determined by molecular dynamics calculations based on quantum chemical potentials, as well as density functional theory. The decrease in orientational order with increasing temperature is also explored in the simulations whereas in the experiment it is impossible to vary the temperature.
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Affiliation(s)
- Samuel Zöttl
- Institut für Ionenphysik und Angewandte Physik, University of Innsbruck, Technikerstrasse 25, A-6020 Innsbruck, Austria
| | - Alexander Kaiser
- Institut für Ionenphysik und Angewandte Physik, University of Innsbruck, Technikerstrasse 25, A-6020 Innsbruck, Austria
| | - Matthias Daxner
- Institut für Ionenphysik und Angewandte Physik, University of Innsbruck, Technikerstrasse 25, A-6020 Innsbruck, Austria
| | - Marcelo Goulart
- Institut für Ionenphysik und Angewandte Physik, University of Innsbruck, Technikerstrasse 25, A-6020 Innsbruck, Austria
| | - Andreas Mauracher
- Institut für Ionenphysik und Angewandte Physik, University of Innsbruck, Technikerstrasse 25, A-6020 Innsbruck, Austria
| | - Michael Probst
- Institut für Ionenphysik und Angewandte Physik, University of Innsbruck, Technikerstrasse 25, A-6020 Innsbruck, Austria
| | - Frank Hagelberg
- Department of Physics and Astronomy, East Tennessee State University, Johnson City, TN 37614, USA
| | - Stephan Denifl
- Institut für Ionenphysik und Angewandte Physik, University of Innsbruck, Technikerstrasse 25, A-6020 Innsbruck, Austria
| | - Paul Scheier
- Institut für Ionenphysik und Angewandte Physik, University of Innsbruck, Technikerstrasse 25, A-6020 Innsbruck, Austria
| | - Olof Echt
- Institut für Ionenphysik und Angewandte Physik, University of Innsbruck, Technikerstrasse 25, A-6020 Innsbruck, Austria
- Department of Physics, University of New Hampshire, Durham, NH 03824, USA
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Sato YU, Sano M. Dispersing single-walled carbon nanotubes using common phospholipids with a small amount of polyethylene glycol-phospholipid additives. Colloids Surf A Physicochem Eng Asp 2014. [DOI: 10.1016/j.colsurfa.2013.09.032] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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He G, Zhang J, Zhang Y, Chen H, Wang X. Fast and Efficient Removal of Cationic Dye Using Graphite Oxide, Adsorption, and Kinetics Studies. J DISPER SCI TECHNOL 2013. [DOI: 10.1080/01932691.2012.739946] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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9
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Dynamic and Equilibrium Studies on the sorption of Basic dye (Basic Brown 4) onto Multi-walled Carbon Nanotubes Prepared from Renewable Carbon Precursors. ACTA ACUST UNITED AC 2013. [DOI: 10.13074/jent.2013.09.132033] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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10
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Gupta VK, Kumar R, Nayak A, Saleh TA, Barakat MA. Adsorptive removal of dyes from aqueous solution onto carbon nanotubes: a review. Adv Colloid Interface Sci 2013; 193-194:24-34. [PMID: 23579224 DOI: 10.1016/j.cis.2013.03.003] [Citation(s) in RCA: 537] [Impact Index Per Article: 48.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2012] [Revised: 03/16/2013] [Accepted: 03/16/2013] [Indexed: 12/07/2022]
Abstract
Adsorption is a widely used technique for the separation and removal of pollutants from wastewaters. Carbon nanotubes (CNTs) are emerging as potential adsorbents because of its well defined cylindrical hollow structure, large surface area, high aspect ratios, hydrophobic wall and easily modified surfaces. In this review, dye adsorption capability of CNTs and CNT based composites from aqueous system has been compiled. This article provides the information about the defect, adsorption sites on CNTs and batch adsorption studies under the influence of various operational parameters such as contact time, solution pH, temperatures etc. and deals with mechanisms involved in adsorption of dyes onto CNTs. From the literature reviewed, it is observed that single walled carbon nanotubes (SWCNTs) show higher adsorption capacity than multi walled carbon nanotubes (MWCNTs) and functionalized and CNT composite have better sorption capacity than as grown CNTs. It is evident from the literature that CNT based nanosorbents have shown good potential for the removal of dyes from aqueous solution. However, still more research work should be focused on the development of cost effective, higher efficient and environmental friendly CNT based nanosorbents for their commercial applications.
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Affiliation(s)
- Vinod Kumar Gupta
- Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee, 247 667, India.
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Mousavi Ehteshami SM, Chan SH. Molecular Simulations in Activated Carbons for Carbon Monoxide Removal From Wet Mixture of Hydrogen and Carbon Monoxide. SEP SCI TECHNOL 2013. [DOI: 10.1080/01496395.2012.755699] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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12
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Mezgebe M, Jiang LH, Shen Q, Du C, Yu HR. Studies and comparison of the liquid adsorption behavior and surface properties of single- and multiwall carbon nanotubes by capillary rise method. Colloids Surf A Physicochem Eng Asp 2012. [DOI: 10.1016/j.colsurfa.2012.09.046] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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13
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Lawson DB, Walker A. Cycloaddition of ethene on a series of single-walled carbon nanotubes. COMPUT THEOR CHEM 2012. [DOI: 10.1016/j.comptc.2011.11.040] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Blanco AAG, Rocha JV, Múnera JF, Nazzarro M, Zgrablich G, Sapag K. A Study of the Adsorption Properties of Single Walled Carbon Nanotubes Treated with Nitric Acid. ADSORPT SCI TECHNOL 2011. [DOI: 10.1260/0263-6174.29.7.705] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Affiliation(s)
- Andrés A. García Blanco
- Instituto de Física Aplicada, CONICET-Universidad Nacional de San Luis, Chacabuco 917, San Luis, C.P. 5700, Argentina
| | - Jhonny Villarroel Rocha
- Instituto de Física Aplicada, CONICET-Universidad Nacional de San Luis, Chacabuco 917, San Luis, C.P. 5700, Argentina
| | - John F. Múnera
- Instituto de Investigaciones en Catálisis y Petroquímica, FIQ, CONICET-Universidad Nacional del Litoral, Santa Fe, Argentina
| | - Marcelo Nazzarro
- Instituto de Física Aplicada, CONICET-Universidad Nacional de San Luis, Chacabuco 917, San Luis, C.P. 5700, Argentina
| | - Giorgio Zgrablich
- Instituto de Física Aplicada, CONICET-Universidad Nacional de San Luis, Chacabuco 917, San Luis, C.P. 5700, Argentina
| | - Karim Sapag
- Instituto de Física Aplicada, CONICET-Universidad Nacional de San Luis, Chacabuco 917, San Luis, C.P. 5700, Argentina
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15
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Cruz FJAL, Müller EA, Mota JPB. The role of the intermolecular potential on the dynamics of ethylene confined in cylindrical nanopores. RSC Adv 2011. [DOI: 10.1039/c1ra00019e] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
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Hussain CM, Mitra S. Micropreconcentration units based on carbon nanotubes (CNT). Anal Bioanal Chem 2010; 399:75-89. [DOI: 10.1007/s00216-010-4194-6] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2010] [Revised: 08/27/2010] [Accepted: 09/02/2010] [Indexed: 11/24/2022]
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