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Boudjema L, Assaf M, Salles F, Gassin PM, Martin-Gassin G, Zajac J. Renewing Interest in Zeolites as Adsorbents for Capture of Cationic Dyes from Aqueous and Ethanolic Solutions: A Simulation-Based Insight into the Efficiency of Dye Adsorption in View of Wastewater Treatment and Valorization of Post-Sorption Materials. Molecules 2024; 29:2952. [PMID: 38998904 PMCID: PMC11243570 DOI: 10.3390/molecules29132952] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2024] [Revised: 06/17/2024] [Accepted: 06/18/2024] [Indexed: 07/14/2024] Open
Abstract
The impact of solvents on the efficiency of cationic dye adsorption from a solution onto protonated Faujasite-type zeolite (FAU-Y) was investigated in the prospect of supporting potential applications in wastewater treatment or in the preparation of building blocks for optical devices. The adsorption isotherms were experimentally determined for methylene blue (MB) and auramine O (AO) from single-component solutions in water and in ethanol. The limiting dye uptake (saturation capacity) was evaluated for each adsorption system, and it decreased in the order of MB-water > AO-water > AO-ethanol > MB-ethanol. The mutual distances and orientations of the adsorbed dye species, and their interactions with the oxygen sites of the FAU-Y framework, with the solvent molecules, and among themselves were inferred from Monte Carlo simulations and subsequently utilized to rationalize the observed differences in the saturation capacity. The dye-solvent competition and the propensity of the dyes to form compact pi-stacked dimers were shown to play an important role in establishing a non-uniform distribution of the adsorbed species throughout the porous space. The two effects appeared particularly strong in the case of the MB-water system. The necessity of including solvent effects in modeling studies is emphasized.
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Affiliation(s)
| | | | - Fabrice Salles
- ICGM, Univ Montpellier, CNRS, ENSCM, Montpellier, France; (L.B.); (M.A.); (P.-M.G.); (G.M.-G.)
| | | | | | - Jerzy Zajac
- ICGM, Univ Montpellier, CNRS, ENSCM, Montpellier, France; (L.B.); (M.A.); (P.-M.G.); (G.M.-G.)
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2
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Boukair K, Salazar JM, Weber G, Badawi M, Ouaskit S, Simon JM. Toward the development of sensors for lung cancer: The adsorption of 1-propanol on hydrophobic zeolites. J Chem Phys 2023; 159:214712. [PMID: 38059548 DOI: 10.1063/5.0168230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Accepted: 11/07/2023] [Indexed: 12/08/2023] Open
Abstract
A healthy breath is mainly composed of water, carbon dioxide, molecular nitrogen, and oxygen and it contains many species, in small quantities, which are related to the ambient atmosphere and the metabolism. The breath of a person affected by lung cancer presents a concentration of 1-propanol higher than usual. In this context, the development of specific sensors to detect 1-propanol from breath is of high interest. The amount of propanol usually detected on the breath is of few ppb; this small quantity is a handicap for a reliable diagnostic. This limitation can be overcome if the sensor is equipped with a pre-concentrator. Our studies aim to provide an efficient material playing this role. This will contribute to the development of reliable and easy to use lung cancer detectors. For this, we investigate the properties of a few hydrophobic porous materials (chabazite, silicalite-1, and dealuminated faujasite). Hydrophobic structures are used to avoid saturation of materials by the water present in the exhaled breath. Our experimental and simulation results suggest that silicalite -1 (MFI) is the most suitable structure to be used as a pre-concentrator.
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Affiliation(s)
- K Boukair
- Laboratoire de Physique de la Matière Condensée, Hassan 2 University, Casablanca, Morroco
| | - J M Salazar
- ICB-UMR 6303 CNRS, Bourgogne Franche Comté University, Dijon, France
| | - G Weber
- ICB-UMR 6303 CNRS, Bourgogne Franche Comté University, Dijon, France
| | - M Badawi
- Laboratoire de Physique et Chimie Théoriques, University of Lorraine, Nancy, France
- Université de Lorraine, CNRS, L2CM, F-57000 Metz, France
| | - S Ouaskit
- Laboratoire de Physique de la Matière Condensée, Hassan 2 University, Casablanca, Morroco
| | - J-M Simon
- ICB-UMR 6303 CNRS, Bourgogne Franche Comté University, Dijon, France
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3
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Otis J, Hofmann J, Schmidt T, Buttersack C, Gläser R. Hydrophilic interaction liquid chromatography with methanol-water eluent on a zeolite. Anal Chim Acta 2023; 1267:341323. [PMID: 37257962 DOI: 10.1016/j.aca.2023.341323] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Revised: 04/11/2023] [Accepted: 05/02/2023] [Indexed: 06/02/2023]
Abstract
BACKGROUND Hydrophilic interaction chromatography (HILIC) works with organic solvent-water mixtures as eluent and is based on the formation of a water enriched liquid phase on the surface of a hydrophilic stationary phase. Hydrophilic solutes are retained on that stagnant water-rich film depending on the difference of solvation compared to the mobile phase composition. However, the enhancement of selectivity by increasing the fraction of organic cosolvent is coupled with a limitation the analyte solubility, and the improvement of the HILIC principle by new hydrophilic stationary phases is the remaining option. RESULTS Y-zeolite (faujasite, FAU type) in the Na+-form with an average particle diameter of 5 μm was used as packing material in a 125 mm long HPLC column. The chromatographic response of the column was tested in methanol-water mixtures as eluent after injection of several aliphatic alcohols, polyols and monosaccharides with eluent conditions where no separation occurs on diol functionalized silica. On the zeolite the retention time increases according to ethylene glycol < glycerol < erythritol < sorbitol < inositol. The separation principle is explained to be superposed by two effects: firstly, a partition equilibrium between the water-rich phase in the zeolite micropores exists, and secondly, selective interactions with the inner crystalline pore surface and fixed-position Na+ ions, both serving to enhance the selectivity. Furthermore, arabinose and fructose monosaccharides could be separated into their tautomeric forms. Only upon increasing the temperature from 20 to 60 °C the tautomeric pattern merges into a single peak. SIGNIFICANCE AND NOVELTY Instead of the stagnant water rich surface layer, zeolite micropores now take over that function. As a result, the selectivity among polyols and between α/β-arabinopyranose and β-fructopyranose/β-fructofuranose tautomers is extraordinary superior towards conventional hydrophilic interaction liquid chromatography (HILIC).
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Affiliation(s)
- James Otis
- University of Toronto, Department of Biochemistry, 1 King's College Circle, Toronto, ONM5G 0A4, Canada
| | - Jörg Hofmann
- Institut für Nichtklassische Chemie e.V, Permoser Str. 15, 04318, Leipzig, Germany
| | - Thomas Schmidt
- VDS Optilab Chromatographie Technik GmbH, Wiesenweg 11a, 10365, Berlin, Germany
| | - Christoph Buttersack
- Institute of Chemical Technology, Leipzig University, Linnéstr. 3, 04103, Leipzig, Germany.
| | - Roger Gläser
- Institute of Chemical Technology, Leipzig University, Linnéstr. 3, 04103, Leipzig, Germany
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Ungerer P, Minisini B. Prediction of ionic conductivity from adiabatic heating in non-equilibrium molecular dynamics on various test systems. J Mol Model 2023; 29:234. [PMID: 37414998 DOI: 10.1007/s00894-023-05640-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Accepted: 06/28/2023] [Indexed: 07/08/2023]
Abstract
CONTEXT The evaluation of ionic conductivity through atomistic modeling typically involves calculating diffusion coefficients, which often necessitates simulations spanning several hundreds of nanoseconds. This study introduces a less computationally demanding approach based on non-equilibrium molecular dynamics applicable to a wide range of systems. METHOD Ionic conductivity is determined by evaluating the Joule heating effect recorded during non-equilibrium molecular dynamics (NEMD) simulations. These simulations which involve applying a uniform electric field using classical force fields in LAMMPS are conducted within the MedeA software environment. The conductivity value for a specific temperature can thus be obtained from a single simulation together with an estimation of the associated uncertainty. Guidelines for selecting NEMD parameters such as electric field intensity and initial temperature are proposed to satisfy linear irreversible transport. RESULTS The protocol presented in this study is applied to four different types of systems, namely, (i) molten NaCl, (ii) NaCl and LiCl aqueous solutions, (iii) solution of ionic liquid with two solvents, and (iv) NaX zeolites in the anhydrous and hydrated states. The main advantages of the proposed protocol are simplicity of implementation (eliminating the need to store individual ion trajectories), reliability (low electric field, linear response, no perturbation of the equations of motion by a thermostat), and a wide range of applications. The estimated contribution of field-induced drift motion of ions to kinetic energy appears very low, justifying the use of standard kinetic energy in the method. For each system, the reported influence of temperature, ion concentration, solvent nature, or hydration is correctly predicted.
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Affiliation(s)
| | - Benoit Minisini
- Materials Design SA, 42 Av. Verdier, 92120, Montrouge, France.
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5
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Madero-Castro R, Luna-Triguero A, Sławek A, Vicent-Luna JM, Calero S. On the Use of Water and Methanol with Zeolites for Heat Transfer. ACS SUSTAINABLE CHEMISTRY & ENGINEERING 2023; 11:4317-4328. [PMID: 36970114 PMCID: PMC10031555 DOI: 10.1021/acssuschemeng.2c05369] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Revised: 02/24/2023] [Indexed: 06/18/2023]
Abstract
Reducing carbon dioxide emissions has become a must in society, making it crucial to find alternatives to supply the energy demand. Adsorption-based cooling and heating technologies are receiving attention for thermal energy storage applications. In this paper, we study the adsorption of polar working fluids in hydrophobic and hydrophilic zeolites by means of experimental quasi-equilibrated temperature-programmed desorption and adsorption combined with Monte Carlo simulations. We measured and computed water and methanol adsorption isobars in high-silica HS-FAU, NaY, and NaX zeolites. We use the experimental adsorption isobars to develop a set of parameters to model the interaction between methanol and the zeolite and cations. Once we have the adsorption of these polar molecules, we use a mathematical model based on the adsorption potential theory of Dubinin-Polanyi to assess the performance of the adsorbate-working fluids for heat storage applications. We found that molecular simulations are an excellent tool for investigating energy storage applications since we can reproduce, complement, and extend experimental observations. Our results highlight the importance of controlling the hydrophilic/hydrophobic nature of the zeolites by changing the Al content to maximize the working conditions of the heat storage device.
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Affiliation(s)
- Rafael
M. Madero-Castro
- Department
of Physical, Chemical, and Natural Systems, Universidad Pablo de Olavide, Ctra. Utrera km. 1, ES-41013 Seville, Spain
| | - Azahara Luna-Triguero
- Energy
Technology, Department of Mechanical Engineering, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
- Eindhoven
Institute for Renewable Energy Systems (EIRES), Eindhoven University of Technology,
P.O. Box 513, Eindhoven 5600 MB, The Netherlands
| | - Andrzej Sławek
- Academic
Centre for Materials and Nanotechnology, AGH University of Science and Technology, Kawiory 30, 30-055 Kraków, Poland
- Faculty
of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Kraków, Poland
| | - José Manuel Vicent-Luna
- Materials
Simulation and Modelling, Department of Applied Physics, Eindhoven University of Technology, P.O. Box 513, 5600MB Eindhoven, The Netherlands
| | - Sofia Calero
- Department
of Physical, Chemical, and Natural Systems, Universidad Pablo de Olavide, Ctra. Utrera km. 1, ES-41013 Seville, Spain
- Materials
Simulation and Modelling, Department of Applied Physics, Eindhoven University of Technology, P.O. Box 513, 5600MB Eindhoven, The Netherlands
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6
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da Silva GCQ, Simon JM, Salazar JM. When less is more: does more Na +-cations mean more adsorption sites for toluene in faujasites? Phys Chem Chem Phys 2023; 25:8028-8042. [PMID: 36876505 DOI: 10.1039/d2cp04644j] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The unique properties of zeolites make them an interesting material to be used in separation processes. The possibility of tailoring some of their characteristics, like the Si/Al ratio, allows optimizing their synthesis for a given task. Concerning the adsorption of toluene by faujasites an understanding of the effect of cations is necessary to foster the elaboration of new materials, which can capture molecules with a high degree of selectivity and sensitivity. Undoubtedly, this knowledge is relevant for a wide range of applications going from the elaboration of technologies for improving the air-quality to diagnostic procedures to prevent health risks. The studies reported here using Grand Canonical Monte Carlo simulations elucidate the role of Na-cations in the adsorption of toluene by faujasites with different Si/Al ratios. They detail how the location of the cations inhibits or enhances the adsorption. The cations located at site II are shown to be those enhancing the adsorption of toluene on faujasites. Interestingly, the cations located at site III generate a hindrance at high loading. This becomes an impediment for the organization of toluene molecules inside faujasites.
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Affiliation(s)
- G C Q da Silva
- Laboratoire ICB UMR 6303, Université Bourgogne Franche-Comté, 21078 Dijon, France.
| | - J M Simon
- Laboratoire ICB UMR 6303, Université Bourgogne Franche-Comté, 21078 Dijon, France.
| | - J Marcos Salazar
- Laboratoire ICB UMR 6303, Université Bourgogne Franche-Comté, 21078 Dijon, France.
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7
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Hong S, Mallette AJ, Neeway JJ, Motkuri RK, Rimer JD, Mpourmpakis G. Understanding formation thermodynamics of structurally diverse zeolite oligomers with first principles calculations. Dalton Trans 2023; 52:1301-1315. [PMID: 36625388 DOI: 10.1039/d2dt02764j] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The mechanisms of many zeolitic processes, including nucleation and interzeolite transformation, are not fully understood owing to complex growth mixtures that obfuscate in situ monitoring of molecular events. In this work, we provide insights into zeolite chemistry by investigating the formation thermodynamics of small zeolitic species using first principles calculations. We systematically study how formation energies of pure-silicate and aluminosilicate species differ by structure type and size, temperature, and the presence of alkali or alkaline earth metal cations (Na+, K+, and Ca2+). Highly condensed (cage-like) species are found to be strongly preferred to simple rings in the pure-silicate system, and this thermodynamic preference increases with temperature. Introducing aluminum leads to more favorable formation thermodynamics for all species. Moreover, for species with a low Si/Al ratio (≤2), a thermodynamic preference does not exist among structure types; instead, a pool of diverse aluminosilicate structures compete in formation. Metal cation effects strongly depend on the presence of aluminum, cage size, cation type, and location, since each of these factors can alter electrostatic interactions between cations and zeolitic species. We reveal that confined metal cations may destabilize pure-silicate cages due to localized interactions; conversely, they stabilize aluminosilicates due to strong cation-framework attractions in sufficiently large cages. Importantly, this work rationalizes a series of experimental observations and can potentially guide efforts for controlling zeolite nucleation/crystallization processes.
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Affiliation(s)
- Sungil Hong
- Department of Chemical and Petroleum Engineering, University of Pittsburgh, Pittsburgh, PA, 15261, USA.
| | - Adam J Mallette
- Department of Chemical and Biomolecular Engineering, University of Houston, Houston, TX, 77204, USA
| | - James J Neeway
- Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, WA, 99352, USA
| | - Radha Kishan Motkuri
- Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, WA, 99352, USA
| | - Jeffrey D Rimer
- Department of Chemical and Biomolecular Engineering, University of Houston, Houston, TX, 77204, USA
| | - Giannis Mpourmpakis
- Department of Chemical and Petroleum Engineering, University of Pittsburgh, Pittsburgh, PA, 15261, USA.
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8
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Starke A, Pasel C, Bläker C, Eckardt T, Zimmermann J, Bathen D. Investigation of the Adsorption of Hydrogen Sulfide on Faujasite Zeolites Focusing on the Influence of Cations. ACS OMEGA 2022; 7:43665-43677. [PMID: 36506121 PMCID: PMC9730461 DOI: 10.1021/acsomega.2c04606] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Accepted: 10/25/2022] [Indexed: 06/17/2023]
Abstract
During the conversion of natural gas to liquified natural gas, sulfur components are separated by adsorption on zeolites. New zeolite materials may improve this adsorption process. In this paper, the adsorption of hydrogen sulfide is studied on seven faujasite (FAU) zeolites, which differ only in the number of sodium and calcium cations. From a pure NaX zeolite (13X), which contains only sodium cations, the calcium cation content was gradually increased by ion exchange. In a fixed-bed adsorber, cumulative equilibrium loadings of H2S on these zeolites were determined at concentrations between 50 and 2000 ppm at 25 and 85 °C and 1.3 bar (abs). Adsorption isotherms were analyzed considering the influence of cation positioning in the FAU zeolites. The experimental data indicate a superposition of a chemisorptive and a physisorptive mechanism. At a small number of chemisorptive sites, we conclude a dissociation of hydrogen sulfide and covalent bonding of the proton and the hydrogen sulfide ion to the zeolite lattice. The contribution of chemisorption exhibits a very low temperature dependence, which is typical for nearly irreversible reactions with an equilibrium strongly shifted to one side. With an increase in the proportion of Ca2+ cations, only physisorptive adsorption by electrostatic interaction with the cations in the lattice was observed. A large number of physisorptive sites have a lower energetic value. The share of physisorption strongly depends on temperature, which is characteristic of reversible equilibrium reactions.
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Affiliation(s)
- Annika Starke
- Chair of Thermal Process Engineering, University of Duisburg-Essen, Lotharstraße 1, D-47057Duisburg, Germany
| | - Christoph Pasel
- Chair of Thermal Process Engineering, University of Duisburg-Essen, Lotharstraße 1, D-47057Duisburg, Germany
| | - Christian Bläker
- Chair of Thermal Process Engineering, University of Duisburg-Essen, Lotharstraße 1, D-47057Duisburg, Germany
| | - Tobias Eckardt
- BASF Catalysts Germany GmbH, Große Drakeburger Straße 93-97, D-31582Nienburg, Germany
| | - Jens Zimmermann
- Chemiewerk Bad Köstritz GmbH, Heinrichshall 2, D-07586Bad Köstritz, Germany
| | - Dieter Bathen
- Chair of Thermal Process Engineering, University of Duisburg-Essen, Lotharstraße 1, D-47057Duisburg, Germany
- Institute of Energy and Environmental Technology, IUTA e. V., Bliersheimer Straße 60, D-47229Duisburg, Germany
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Zhakisheva B, José Gutiérrez-Sevillano J, Calero S. AMMONIA AND WATER IN ZEOLITES: EFFECT OF ALUMINUM DISTRIBUTION ON THE HEAT OF ADSORPTION. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.122564] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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10
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Antúnez-García J, Yocupicio-Gaxiola RI, Serrato AR, Petranovskii V, Murrieta-Rico FN, Shelyapina MG, Fuentes-Moyado S. A theoretical study of the effect of exchange cations in surface of ZSM-5 lamellar zeolites. J SOLID STATE CHEM 2022. [DOI: 10.1016/j.jssc.2022.123725] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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11
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Fu D, Davis ME. Carbon dioxide capture with zeotype materials. Chem Soc Rev 2022; 51:9340-9370. [DOI: 10.1039/d2cs00508e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This review describes the application of zeotype materials for the capture of CO2 in different scenarios, the critical parameters defining the adsorption performances, and the challenges of zeolitic adsorbents for CO2 capture.
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Affiliation(s)
- Donglong Fu
- Chemical Engineering, California Institute of Technology, Mail Code 210-41, Pasadena, California 91125, USA
| | - Mark E. Davis
- Chemical Engineering, California Institute of Technology, Mail Code 210-41, Pasadena, California 91125, USA
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12
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Datar A, Witman M, Lin L. Monte Carlo simulations for water adsorption in porous materials: Best practices and new insights. AIChE J 2021. [DOI: 10.1002/aic.17447] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Archit Datar
- William G. Lowrie Department of Chemical and Biomolecular Engineering The Ohio State University Columbus Ohio USA
| | | | - Li‐Chiang Lin
- William G. Lowrie Department of Chemical and Biomolecular Engineering The Ohio State University Columbus Ohio USA
- Department of Chemical Engineering National Taiwan University Taipei Taiwan
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13
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Resasco DE, Crossley SP, Wang B, White JL. Interaction of water with zeolites: a review. CATALYSIS REVIEWS 2021. [DOI: 10.1080/01614940.2021.1948301] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Daniel E. Resasco
- University of Oklahoma, School of Chemical, Biological, and Materials Engineering, Norman, OK, USA
| | - Steven P. Crossley
- University of Oklahoma, School of Chemical, Biological, and Materials Engineering, Norman, OK, USA
| | - Bin Wang
- University of Oklahoma, School of Chemical, Biological, and Materials Engineering, Norman, OK, USA
| | - Jeffery L. White
- Oklahoma State University, School of Chemical Engineering, Stillwater, OK, USA
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Abstract
The nanoscale wood-water interaction strength, accessible sorption sites, and cell wall pore sizes are important factors that drive water sorption and the hysteresis phenomenon in wood. In this work, these factors were quantitatively studied using molecular simulations based on a cell wall pore model, previously developed by the authors. Specifically, the wall-water interaction strength, the sorption sites network including their number, interaction range, strength, and spatial distributions were set at a series of theoretical values as simulation input parameters. The results revealed that most of the investigated parameters significantly affected both sorption isotherms and hysteresis. Water monolayers and clusters were observed on the simulated pore surface when the wood-water interaction and sorption site strength were set at unrealistically high values. Furthermore, multiple linear regression models suggested that wood-water interaction and sorption site parameters were coupled in determining sorption isotherms, but not in determining hysteresis.
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15
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Abstract
In addition to the adsorption mechanism, the heat released during exothermic adsorption influences the chemical reactions that follow during heterogeneous catalysis. Both steps depend on the structure and surface chemistry of the catalyst. An example of a typical catalyst is the faujasite zeolite. For faujasite zeolites, the influence of the Si/Al ratio and the number of Na+ and Ca2+ cations on the heat of adsorption was therefore investigated in a systematic study. A comparison between a NaX (Sodium type X faujasite) and a NaY (Sodium type Y faujasite) zeolite reveals that a higher Si/Al ratio and therefore a smaller number of the cations in faujasite zeolites leads to lower loadings and heats. The exchange of Na+ cations for Ca2+ cations also has an influence on the adsorption process. Loadings and heats first decrease slightly at a low degree of exchange and increase significantly with higher calcium contents. If stronger interactions are required for heterogeneous catalysis, then the CaNaX zeolites must have a degree of exchange above 53%. The energetic contributions show that the highest-quality adsorption sites III and III’ make a contribution to the load-dependent heat of adsorption, which is about 1.4 times (site III) and about 1.8 times (site III’) larger than that of adsorption site II.
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16
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Vibrational Spectra of Zeolite Y as a Function of Ion Exchange. Molecules 2021; 26:molecules26020342. [PMID: 33440790 PMCID: PMC7827790 DOI: 10.3390/molecules26020342] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Revised: 12/29/2020] [Accepted: 01/07/2021] [Indexed: 11/16/2022] Open
Abstract
Zeolite Y is one of the earliest known and most widely used synthetic zeolites. Many experimental investigations verify the valuable ion exchange capability of this zeolite. In this study, we assessed the effects of ion exchange on its vibrational spectra. We applied classical lattice dynamics methods for IR and Raman intensity calculations. Computed spectra of optimized zeolite Y structures with different cations were compared with experimental data. The spectra obtained in this study are in agreement with previous experimental and computational studies on zeolites from the faujasite group.
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17
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Heard CJ, Grajciar L, Uhlík F, Shamzhy M, Opanasenko M, Čejka J, Nachtigall P. Zeolite (In)Stability under Aqueous or Steaming Conditions. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2020; 32:e2003264. [PMID: 32780912 DOI: 10.1002/adma.202003264] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Revised: 06/30/2020] [Indexed: 06/11/2023]
Abstract
Zeolites are among the most environmentally friendly materials produced industrially at the Megaton scale. They find numerous commercial applications, particularly in catalysis, adsorption, and separation. Under ambient conditions aluminosilicate zeolites are stable when exposed to water or water vapor. However, at extreme conditions as high temperature, high water vapor pressure or increased acidity/basicity, their crystalline framework can be destroyed. The stability of the zeolite framework under aqueous conditions also depends on the concentration and character of heteroatoms (other than Al) and the topology of the zeolite. The factors critical for zeolite (in)stability in the presence of water under various conditions are reviewed from the experimental as well as computational sides. Nonreactive and reactive interactions of water with zeolites are addressed. The goal of this review is to provide a comparative overview of all-silica zeolites, aluminosilicates and zeolites with other heteroatoms (Ti, Sn, and Ge) when contacted with water. Due attention is also devoted to the situation when partial zeolite hydrolysis is used beneficially, such as the formation of hierarchical zeolites, synthesis of new zeolites or fine-tuning catalytic or adsorption characteristics of zeolites.
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Affiliation(s)
- Christopher James Heard
- Department of Physical and Macromolecular Chemistry & Charles University Center of Advanced Materials, Faculty of Science, Charles University, Hlavova 8, Prague 2, Prague, 128 43, Czech Republic
| | - Lukáš Grajciar
- Department of Physical and Macromolecular Chemistry & Charles University Center of Advanced Materials, Faculty of Science, Charles University, Hlavova 8, Prague 2, Prague, 128 43, Czech Republic
| | - Filip Uhlík
- Department of Physical and Macromolecular Chemistry & Charles University Center of Advanced Materials, Faculty of Science, Charles University, Hlavova 8, Prague 2, Prague, 128 43, Czech Republic
| | - Mariya Shamzhy
- Department of Physical and Macromolecular Chemistry & Charles University Center of Advanced Materials, Faculty of Science, Charles University, Hlavova 8, Prague 2, Prague, 128 43, Czech Republic
| | - Maksym Opanasenko
- Department of Physical and Macromolecular Chemistry & Charles University Center of Advanced Materials, Faculty of Science, Charles University, Hlavova 8, Prague 2, Prague, 128 43, Czech Republic
| | - Jiří Čejka
- Department of Physical and Macromolecular Chemistry & Charles University Center of Advanced Materials, Faculty of Science, Charles University, Hlavova 8, Prague 2, Prague, 128 43, Czech Republic
| | - Petr Nachtigall
- Department of Physical and Macromolecular Chemistry & Charles University Center of Advanced Materials, Faculty of Science, Charles University, Hlavova 8, Prague 2, Prague, 128 43, Czech Republic
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18
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Ahsan SAMS, Durani S, Reddy G, Subramanian Y. Shared hydrogen bonds: water in aluminated faujasite. Phys Chem Chem Phys 2020; 22:1632-1639. [PMID: 31894781 DOI: 10.1039/c9cp04972j] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Water confined in faujasite, a zeolite, with aluminium content, exhibits properties different from those of bulk water as well as water confined in siliceous faujasite. The RDF between oxygen of water (OW) and oxygen of aluminium (OAl) shows a prominent first peak near to 2.9 Å similar to any oxygen-oxygen RDF seen in bulk water and unlike water confined in siliceous faujasite. Further, HW-OAl shows a peak near 1.9 Å suggesting hydrogen bonding between hydrogen of water and OAl. The water satisfies the hydrogen bond criteria with both O1Al and O2Al indicating that it is participating in a shared hydrogen bond. The hydrogen bond exchange between such a water forming a shared hydrogen bond to OAl and another water molecule H2Ob is investigated through the changes in the distances and appropriate angles. The O-Al-O angle of the zeolite increases by about 7 degrees on the formation of the shared hydrogen bond. The jump dynamics of the shared hydrogen bond when the two bonds break simultaneously has been obtained and this is reported. This jump reorientation dynamics is different compared to normal hydrogen bonding reported by Laage and Hynes: it has a short lifetime, around 50-100 fs computed from SHB(t). The intermittent and continuous hydrogen bond correlation functions are also reported.
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Affiliation(s)
- S A M Shamimul Ahsan
- Atomic Mineral Directorate For Exploration & Research, Nagarbhavi, Bangalore-560072, India
| | - Smeer Durani
- Atomic Mineral Directorate For Exploration & Research, R. K. Puram, New Delhi-110066, India
| | - Govardhan Reddy
- Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore-560012, India.
| | - Yashonath Subramanian
- Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore-560012, India.
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Wu H, Salles F, Zajac J. A Critical Review of Solid Materials for Low-Temperature Thermochemical Storage of Solar Energy Based on Solid-Vapour Adsorption in View of Space Heating Uses. Molecules 2019; 24:E945. [PMID: 30866556 PMCID: PMC6429295 DOI: 10.3390/molecules24050945] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2019] [Revised: 02/26/2019] [Accepted: 03/02/2019] [Indexed: 02/04/2023] Open
Abstract
The present report deals with low-temperature thermochemical storage for space heating, which is based on the principles of vapour adsorption onto solid adsorbents. With the aim of obtaining comprehensive information on the rationalized selection of adsorbents for heat storage in open sorption systems operating in the moist-air flow mode, various materials reported up to now in the literature are reviewed by referring strictly to the possible mechanisms of water vapour adsorption, as well as practical aspects of their preparation or their application under particular operating conditions. It seems reasonable to suggest that, on the basis of the current state-of-the-art, the adsorption phenomenon may be rather exploited in the auxiliary heating systems, which provide additional heat during winter's coldest days.
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Affiliation(s)
- Hao Wu
- Institut Charles Gerhardt Montpellier ⁻ UMR CNRS 5253, UM, ENSCM, Place E. Bataillon, CEDEX 05, 34095 Montpellier, France.
| | - Fabrice Salles
- Institut Charles Gerhardt Montpellier ⁻ UMR CNRS 5253, UM, ENSCM, Place E. Bataillon, CEDEX 05, 34095 Montpellier, France.
| | - Jerzy Zajac
- Institut Charles Gerhardt Montpellier ⁻ UMR CNRS 5253, UM, ENSCM, Place E. Bataillon, CEDEX 05, 34095 Montpellier, France.
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20
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Khabzina Y, Laroche C, Pérez-Pellitero J, Farrusseng D. Quantitative structure-property relationship approach to predicting xylene separation with diverse exchanged faujasites. Phys Chem Chem Phys 2018; 20:23773-23782. [PMID: 30198530 DOI: 10.1039/c8cp04042g] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Streamlining the xylene separation process on faujasites is a promising way to design innovative adsorbents for this application. For this purpose, we present herein an original quantitative structure-property relationship (QSPR) approach. It deals with the development of a multi-linear predictive model correlating the separation properties with a set of structural descriptors for the adsorbents. The implementation of such an approach makes it necessary to (i) set an appropriate design of experiment (DOE), (ii) prepare an adsorbent database, (iii) test the adsorbent database for xylene separation and (iv) compute a set of relevant descriptors. The selected descriptors essentially characterize the nature of the confinement in the faujasite supercage, i.e., the size of the cations localized in adsorption sites II, as well as the occupancy ratio of both adsorption sites II and III. Two different statistical methods were applied to develop a structure-property relationship model linking experimental selectivity and the set of descriptors. A multiple linear regression model enables the prediction of para/meta-xylene selectivity with a correlation coefficient R2 of 0.78, while a linear discriminant analysis predicts the assignment of the adsorbents to four identified classes with a total prediction percentage of 76%.
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Affiliation(s)
- Y Khabzina
- IFP Energies nouvelles, Rond-point de l'échangeur de Solaize, BP 3, 69360 Solaize, France
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21
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Abstract
Empty spaces are abhorred by nature, which immediately rushes in to fill the void. Humans have learnt pretty well how to make ordered empty nanocontainers, and to get useful products out of them. When such an order is imparted to molecules, new properties may appear, often yielding advanced applications. This review illustrates how the organized void space inherently present in various materials: zeolites, clathrates, mesoporous silica/organosilica, and metal organic frameworks (MOF), for example, can be exploited to create confined, organized, and self-assembled supramolecular structures of low dimensionality. Features of the confining matrices relevant to organization are presented with special focus on molecular-level aspects. Selected examples of confined supramolecular assemblies - from small molecules to quantum dots or luminescent species - are aimed to show the complexity and potential of this approach. Natural confinement (minerals) and hyperconfinement (high pressure) provide further opportunities to understand and master the atomistic-level interactions governing supramolecular organization under nanospace restrictions.
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Affiliation(s)
- Gloria Tabacchi
- Department of Science and High Technology, University of Insubria, Via Valleggio, 9 I-22100, Como, Italy
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22
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Zhang C, Peng L, Jiang J, Gu X. Mass transfer model, preparation and applications of zeolite membranes for pervaporation dehydration: A review. Chin J Chem Eng 2017. [DOI: 10.1016/j.cjche.2017.09.014] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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23
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Fraux G, Coudert FX, Boutin A, Fuchs AH. Forced intrusion of water and aqueous solutions in microporous materials: from fundamental thermodynamics to energy storage devices. Chem Soc Rev 2017; 46:7421-7437. [PMID: 29051934 DOI: 10.1039/c7cs00478h] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
We review the high pressure forced intrusion studies of water in hydrophobic microporous materials such as zeolites and MOFs, a field of research that has emerged some 15 years ago and is now very active. Many of these studies are aimed at investigating the possibility of using these systems as energy storage devices. A series of all-silica zeolites (zeosil) frameworks were found suitable for reversible energy storage because of their stability with respect to hydrolysis after several water intrusion-extrusion cycles. Several microporous hydrophobic zeolite imidazolate frameworks (ZIFs) also happen to be quite stable and resistant towards hydrolysis and thus seem very promising for energy storage applications. Replacing pure water by electrolyte aqueous solutions enables to increase the stored energy by a factor close to 3, on account of the high pressure shift of the intrusion transition. In addition to the fact that aqueous solutions and microporous silica materials are environmental friendly, these systems are thus becoming increasingly interesting for the design of new energy storage devices. This review also addresses the theoretical approaches and molecular simulations performed in order to better understand the experimental behavior of nano-confined water. Molecular simulation studies showed that water condensation takes place through a genuine first-order phase transition, provided that the interconnected pores structure is 3-dimensional and sufficiently open. In an extreme confinement situations such as in ferrierite zeosil, condensation seem to take place through a continuous supercritical crossing from a diluted to a dense fluid, on account of the fact that the first-order transition line is shifted to higher pressure, and the confined water critical point is correlatively shifted to lower temperature. These molecular simulation studies suggest that the most important features of the intrusion/extrusion process can be understood in terms of equilibrium thermodynamics considerations.
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Affiliation(s)
- Guillaume Fraux
- Chimie ParisTech, PSL Research University, CNRS, Institut de Recherche de Chimie, Paris, 75005 Paris, France.
| | - François-Xavier Coudert
- Chimie ParisTech, PSL Research University, CNRS, Institut de Recherche de Chimie, Paris, 75005 Paris, France.
| | - Anne Boutin
- PASTEUR, École normale supérieure, PSL Research University, Sorbonne Universités, UPMC Univ. Paris 06, CNRS, 75005 Paris, France
| | - Alain H Fuchs
- Chimie ParisTech, PSL Research University, CNRS, Institut de Recherche de Chimie, Paris, 75005 Paris, France.
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24
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Sava Gallis DF, Ermanoski I, Greathouse JA, Chapman KW, Nenoff TM. Iodine Gas Adsorption in Nanoporous Materials: A Combined Experiment–Modeling Study. Ind Eng Chem Res 2017. [DOI: 10.1021/acs.iecr.6b04189] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Dorina F. Sava Gallis
- Nanoscale
Sciences Department, Sandia National Laboratories, Albuquerque, New Mexico 87185, United States
| | - Ivan Ermanoski
- Materials,
Devices, and Energy Technology Department, Sandia National Laboratories, Albuquerque, New Mexico 87185, United States
| | - Jeffrey A. Greathouse
- Geochemistry
Department, Sandia National Laboratories, Albuquerque, New Mexico 87185, United States
| | - Karena W. Chapman
- X-ray
Science Division, Advanced Photon Source, Argonne National Laboratory, X-ray Science Division, Argonne, Illinois 60439 United States
| | - Tina M. Nenoff
- Physical,
Chemical and Nano Sciences Center, Sandia National Laboratories, Albuquerque, New Mexico 87185, United States
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25
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Ali Ahmad H, Thomas S, Bazin P, Vicente A, Fernandez C, Awala H, Mintova S. Nanosized Na-EMT and Li-EMT zeolites: selective sorption of water and methanol studied by a combined IR and TG approach. Phys Chem Chem Phys 2016; 18:30585-30594. [PMID: 27785497 DOI: 10.1039/c6cp05766g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Nanosized EMT-type zeolite crystals in sodium (Na-EMT) and ion-exchanged lithium (Li-EMT) forms were prepared. The sorption behavior of Li(Na)-EMT samples towards water, methanol and a mixture of both (50 : 50) was studied by combined thermogravimetric and infrared spectroscopic methods. The stability of the samples prior to and after the sorption measurements in two subsequent cycles was confirmed by X-ray diffraction, N2 sorption and NMR spectroscopy. The high sorption capacity of the Li-EMT sample towards water was demonstrated. It was found that the methanol is replaced by water faster in the Li-EMT sample in comparison to the Na-EMT sample. At low temperature, the methanol shows weak adsorption on each cationic site and no side products during desorption for both samples were obtained.
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Affiliation(s)
- Hacan Ali Ahmad
- Normandie Université, ENSICAEN, UNICAEN, CNRS, Laboratoire Catalyse et Spectrochimie, 6 Boulevard Maréchal Juin, 14050 Caen, France.
| | - Sébastien Thomas
- Normandie Université, ENSICAEN, UNICAEN, CNRS, Laboratoire Catalyse et Spectrochimie, 6 Boulevard Maréchal Juin, 14050 Caen, France.
| | - Philippe Bazin
- Normandie Université, ENSICAEN, UNICAEN, CNRS, Laboratoire Catalyse et Spectrochimie, 6 Boulevard Maréchal Juin, 14050 Caen, France.
| | - Aurélie Vicente
- Normandie Université, ENSICAEN, UNICAEN, CNRS, Laboratoire Catalyse et Spectrochimie, 6 Boulevard Maréchal Juin, 14050 Caen, France.
| | - Christian Fernandez
- Normandie Université, ENSICAEN, UNICAEN, CNRS, Laboratoire Catalyse et Spectrochimie, 6 Boulevard Maréchal Juin, 14050 Caen, France.
| | - Hussein Awala
- Normandie Université, ENSICAEN, UNICAEN, CNRS, Laboratoire Catalyse et Spectrochimie, 6 Boulevard Maréchal Juin, 14050 Caen, France.
| | - Svetlana Mintova
- Normandie Université, ENSICAEN, UNICAEN, CNRS, Laboratoire Catalyse et Spectrochimie, 6 Boulevard Maréchal Juin, 14050 Caen, France.
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26
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Louisfrema W, Rotenberg B, Porcher F, Paillaud JL, Massiani P, Boutin A. Cation redistribution upon dehydration of Na58Y faujasite zeolite: a joint neutron diffraction and molecular simulation study. MOLECULAR SIMULATION 2015. [DOI: 10.1080/08927022.2015.1027889] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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27
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Porcher FF, Souhassou M, Lecomte CEP. Experimental determination of electrostatic properties of Na-X zeolite from high resolution X-ray diffraction. Phys Chem Chem Phys 2015; 16:12228-36. [PMID: 24818591 DOI: 10.1039/c3cp55397c] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
High-resolution single crystal X-ray diffraction is used for the first time to obtain the charge density distribution in dehydrated Na-X zeolite. The electron density is extracted according to the Hansen & Coppens multipolar-model, from which Pval-κ-type atomic charges are derived. In order to compare the experimental electron density with theoretical calculations on zeolites and other minerals, a topological analysis is performed to derive AIM charges and electron density properties at bond critical points. The results are compared with that described in the literature. Finally, the electrostatic potential is evaluated in a periodic, mean field approach (disordered cation distribution in the Fd3[combining macron] space group) and for a given distribution of the cations (space group P1). The electrostatic energy is, then, derived in the neighbourhood of cation sites where the molecules are usually physisorbed.
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Affiliation(s)
- F F Porcher
- Université de Lorraine, CRM2, UMR7036, Vandœuvre-lès-Nancy, F-54506, France.
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28
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Gómez-Álvarez P, Calero S. Insights into the microscopic behaviour of nanoconfined water: host structure and thermal effects. CrystEngComm 2015. [DOI: 10.1039/c4ce01335b] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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29
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30
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Pera-Titus M, Palomino M, Valencia S, Rey F. Thermodynamic analysis of framework deformation in Na,Cs-RHO zeolite upon CO2adsorption. Phys Chem Chem Phys 2014; 16:24391-400. [DOI: 10.1039/c4cp03409k] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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31
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Burtch NC, Jasuja H, Walton KS. Water Stability and Adsorption in Metal–Organic Frameworks. Chem Rev 2014; 114:10575-612. [DOI: 10.1021/cr5002589] [Citation(s) in RCA: 1621] [Impact Index Per Article: 162.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Nicholas C. Burtch
- School of Chemical & Biomolecular Engineering, Georgia Institute of Technology, 311 Ferst Drive NW, Atlanta, Georgia 30332, United States
| | - Himanshu Jasuja
- School of Chemical & Biomolecular Engineering, Georgia Institute of Technology, 311 Ferst Drive NW, Atlanta, Georgia 30332, United States
| | - Krista S. Walton
- School of Chemical & Biomolecular Engineering, Georgia Institute of Technology, 311 Ferst Drive NW, Atlanta, Georgia 30332, United States
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32
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Silva MSP, Mota JPB, Rodrigues AE. Adsorption Equilibrium and Kinetics of the Parex' Feed and Desorbent Streams from Batch Experiments. Chem Eng Technol 2014. [DOI: 10.1002/ceat.201300721] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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33
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Humplik T, Raj R, Maroo SC, Laoui T, Wang EN. Effect of hydrophilic defects on water transport in MFI zeolites. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:6446-6453. [PMID: 24810585 DOI: 10.1021/la500939t] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The subnanometer pore structure of zeolites and other microporous materials has been proposed to act as a molecular sieve for various water separation technologies. However, due to the increased interaction between the solid and water in these nanoconfined spaces, it is unclear which type of interface, be it hydrophilic or hydrophobic, offers an advantageous medium for enhancing transport properties. In this work, we probe the role of hydrophilic defects on the transport of water inside the microporous hydrophobic MFI zeolite pore structure via combined sorption and high-pressure infiltration experiments. While the inclusion of defects was observed to increase the amount of water within the zeolite pore network by up to 7 times at the saturation pressure, the diffusivity of this infiltrated water was lowered by up to 2 orders of magnitude in comparison to that of water within the nearly defect-free hydrophobic MFI zeolite. Subsequently, the permeability of water within the more defective MFI zeolite was an order of magnitude lower than that of the nearly defect-free zeolite. The results from these experiments suggest that the intrinsic hydrophobic pore structure of MFI zeolites can facilitate faster water transport due to the decreased attraction between the water and the defect-free surface. While the strong attraction of water to the defects allows for water to infiltrate the porous network at lower pressures, the results suggest that this strong attraction decreases the mobility of the infiltrated water. The insights gained from this study can be utilized to improve the design of future membranes for water desalination and other separation techniques.
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Affiliation(s)
- Thomas Humplik
- Department of Mechanical Engineering, Massachusetts Institute of Technology , Cambridge, Massachusetts 02139, United States
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34
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Nguyen VT, Nguyen PT, Dang LX, Mei D, Wick CD, Do DD. A comparative study of the adsorption of water and methanol in zeolite BEA: a molecular simulation study. MOLECULAR SIMULATION 2014. [DOI: 10.1080/08927022.2013.848280] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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35
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Nakamura H, Okumura M, Machida M. Monte Carlo simulation studies of cation selectivity in ion exchange of zeolites. RSC Adv 2014. [DOI: 10.1039/c4ra09460c] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
The ion-exchange isotherms for various zeolites are investigated by Monte Carlo simulation to numerically evaluate their cation selectivity.0
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36
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Jeffroy M, Nieto-Draghi C, Boutin A. Molecular simulation of zeolite flexibility. MOLECULAR SIMULATION 2013. [DOI: 10.1080/08927022.2013.840898] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Marie Jeffroy
- IFP Energies Nouvelles, 1 et 4, Avenue de Bois-Préau, 92852, Rueil-Malmaison, France
- Laboratoire de Chimie Physique, Université Paris Sud XI, Bâtiment 349, Orsay Cedex, France
| | - Carlos Nieto-Draghi
- Laboratoire de Chimie Physique, Université Paris Sud XI, Bâtiment 349, Orsay Cedex, France
| | - Anne Boutin
- Département de Chimie, CNRS-ENS-UPMC, UMR 8640, École Normale Supérieure, 24 rue Lhomond, 75005, Paris, France
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37
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Joos L, Swisher JA, Smit B. Molecular simulation study of the competitive adsorption of H2O and CO2 in zeolite 13X. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:15936-15942. [PMID: 24313865 DOI: 10.1021/la403824g] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The presence of H2O in postcombustion gas streams is an important technical issue for deploying CO2-selective adsorbents. Because of its permanent dipole, H2O can interact strongly with materials where the selectivity for CO2 is a consequence of its quadrupole interacting with charges in the material. We performed molecular simulations to model the adsorption of pure H2O and CO2 as well as H2O/CO2 mixtures in 13X, a popular zeolite for CO2 capture processes that is commercially available. The simulations show that H2O reduces the capacity of these materials for adsorbing CO2 by an order of magnitude and that at the partial pressures of H2O relevant for postcombustion capture, 13X will be essentially saturated with H2O .
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Affiliation(s)
- Lennart Joos
- Department of Chemical and Biomolecular Engineering, University of California , Berkeley, California 94720, United States
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38
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Pera-Titus M. Porous inorganic membranes for CO2 capture: present and prospects. Chem Rev 2013; 114:1413-92. [PMID: 24299113 DOI: 10.1021/cr400237k] [Citation(s) in RCA: 284] [Impact Index Per Article: 25.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Marc Pera-Titus
- Institut de Recherches sur la Catalyse et l'Environnement de Lyon (IRCELYON), Université de Lyon, UMR 5256 CNRS-Université Lyon 1 , 2 Av. A. Einstein, 69626 Villeurbanne Cedex, France
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39
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Khosravi A, Golchoobi A, Modarress H, Ahmadzadeh A. The effects of partial charges and water models on water adsorption in nanostructured zeolites, application of PN-TrAz potential in parallel GCMC. MOLECULAR SIMULATION 2013. [DOI: 10.1080/08927022.2012.747683] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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40
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Investigating the influence of diffusional coupling on mixture permeation across porous membranes. J Memb Sci 2013. [DOI: 10.1016/j.memsci.2012.12.004] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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41
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Castillo JM, Silvestre-Albero J, Rodriguez-Reinoso F, Vlugt TJH, Calero S. Water adsorption in hydrophilic zeolites: experiment and simulation. Phys Chem Chem Phys 2013; 15:17374-82. [DOI: 10.1039/c3cp52910j] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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42
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Silva MSP, Moreira MA, Ferreira AFP, Santos JC, Silva VMTM, Sá Gomes P, Minceva M, Mota JPB, Rodrigues AE. Adsorbent Evaluation Based on Experimental Breakthrough Curves: Separation ofp-Xylene from C8Isomers. Chem Eng Technol 2012. [DOI: 10.1002/ceat.201100672] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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43
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Bonnaud PA, Coasne B, Pellenq RJM. Solvated calcium ions in charged silica nanopores. J Chem Phys 2012; 137:064706. [DOI: 10.1063/1.4742854] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
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44
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Ferreira DR, Schulthess CP, Giotto MV. An investigation of strong sodium retention mechanisms in nanopore environments using nuclear magnetic resonance spectroscopy. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2012; 46:300-306. [PMID: 22098397 DOI: 10.1021/es2033394] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Recent experimental research into the adsorption of various cations on zeolite minerals has shown that nanopore channels of approximately 0.5 nm or less can create an effect whereby the adsorption of ions, especially those that are weakly hydrated, can be significantly enhanced. This enhanced adsorption occurs due to the removal of hydrating water molecules which in turn is caused by the nanopore channel's small size. A new adsorption model, called the nanopore inner-sphere enhancement (NISE) effect, has been proposed that explains this unusual adsorption mechanism. To further validate this model a series of nuclear magnetic resonance (NMR) spectroscopy studies is presented here. NMR spectra were gathered for Na adsorbed on three zeolite minerals of similar chemical composition but differing nanoporosities: zeolite Y with a limiting dimension of 0.76 nm, ZSM-5 with a limiting dimension of 0.51 nm, and mordenite with a limiting dimension of 0.26 nm. The NMR experiments validated the predictions of the NISE model whereby Na adsorbed via outer-sphere on zeolite Y, inner-sphere on ZSM-5, and a combination of both mechanisms on mordenite. The strong Na adsorption observed in these nanoporous minerals conflicts with sodium's general designation as a weak electrolyte.
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Affiliation(s)
- Daniel R Ferreira
- Department of Plant Science and Landscape Architecture, University of Connecticut, 1376 Storrs Road, Storrs, Connecticut 06269-4067, United States.
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45
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Jeffroy M, Boutin A, Fuchs AH. Understanding the Equilibrium Ion Exchange Properties in Faujasite Zeolite from Monte Carlo Simulations. J Phys Chem B 2011; 115:15059-66. [DOI: 10.1021/jp209067n] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Marie Jeffroy
- IFP Energies Nouvelles (IFPEN), 1 et 4 avenue de Bois-Preau, 92852 Rueil-Malmaison, France
- Ecole Normale Superieure, Departement de Chimie, CNRS-ENS-UPMC, 24 rue Lhomond, 75005 Paris, France
| | - Anne Boutin
- Ecole Normale Superieure, Departement de Chimie, CNRS-ENS-UPMC, 24 rue Lhomond, 75005 Paris, France
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Kraus M, Kopinke FD, Roland U. Influence of moisture content and temperature on the dielectric permittivity of zeolite NaY. Phys Chem Chem Phys 2011; 13:4119-25. [PMID: 21229153 DOI: 10.1039/c0cp02264k] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The influence of moisture content and temperature on the dielectric permittivity (complex resistance) of the zeolite NaY was investigated for a fixed radio frequency (RF) of 13.56 MHz. Sealed glass tubes containing zeolite with defined moisture contents were simultaneously heated in a homogeneous high-frequency electromagnetic field. The dielectric loss factor, i.e. the imaginary part of the permittivity ε(r)″, was calculated from the obtained heating rates. On the basis of the resulting values for various moisture contents and temperatures and utilizing the knowledge of elementary cation hopping processes occurring at low and high frequencies (LF and HF) from the literature, a new model was introduced for the description of dielectric radio-frequency heating of moist zeolites. Since adsorption of water is correlated with an enhancement of the activation energy of the cations on SII sites, cations in the zeolite NaY are moving from SII sites to unoccupied SIII sites when the water content is increasing. Thus, four different transfer processes for the cations have to be considered in total. On the basis of these assumptions, the resulting dielectric loss factor ε(r)″ as a function of water content and temperature for a fixed frequency of 13.56 MHz was modelled. The experimental data are in good agreement with the values obtained from the model. Especially, the measured pronounced maximum of dielectric loss at temperatures below 300 °C and water contents below 4 wt.-% can be explained by the new model.
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Affiliation(s)
- Markus Kraus
- Helmholtz Centre for Environmental Research-UFZ, Department of Environmental Engineering, Permoserstr. 15, 04318 Leipzig, Germany
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Coudert FX, Boutin A, Jeffroy M, Mellot-Draznieks C, Fuchs AH. Thermodynamic methods and models to study flexible metal-organic frameworks. Chemphyschem 2011; 12:247-58. [PMID: 21275013 DOI: 10.1002/cphc.201000590] [Citation(s) in RCA: 73] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2010] [Revised: 12/02/2010] [Indexed: 11/05/2022]
Abstract
Much attention has recently been focused on a fascinating subclass of metal-organic frameworks that behave in a remarkable stimuli-responsive fashion. These soft porous crystals feature dynamic crystalline frameworks displaying reversible, large-amplitude structural deformations under external physical constraints such as temperature, electric field or gas exposure. The number of reported syntheses of such materials is rapidly growing and they are promising for practical applications, such as gas capture, purification and fluid separation. Herein, we summarize the recently developed thermodynamic tools that can help understand the process of fluid adsorption and fluid mixture coadsorption in these flexible nanoporous materials. These tools, which include both molecular simulation methods and analytical models, can help rationalize experimental results and predict adsorption properties over a wide range of thermodynamic conditions. A particular focus is given on how these methods can guide the experimental exploration of a large number of materials and working conditions (temperature, pressure, composition) to help design efficient processes relying on fluid adsorption in soft porous crystals.
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Krishna R, van Baten JM. Hydrogen bonding effects in adsorption of water-alcohol mixtures in zeolites and the consequences for the characteristics of the Maxwell-Stefan diffusivities. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:10854-10867. [PMID: 20411951 DOI: 10.1021/la100737c] [Citation(s) in RCA: 78] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
This work highlights a variety of peculiar characteristics of adsorption and diffusion of polar molecules such as water, methanol and ethanol in zeolites. These peculiarities are investigated with the aid of configurational-bias Monte Carlo (CBMC) simulations of adsorption isotherms, and molecular dynamics (MD) simulations of diffusivities in FAU, MFI, DDR, and LTA zeolites. Because of strong hydrogen bonding, significant clustering of the guest molecules occurs in all investigated structures. Because of molecular clustering, the inverse thermodynamic factor 1/Gamma(i) identical with (d[ln c(i)])/(d[ln f(i)]) exceeds unity for a range molar concentrations c(i) within the micropores. The degree of clustering is lowered as the temperature is increased. For the concentration ranges for which 1/Gamma(i) > 1, the Fick diffusivity, D(i), for unary diffusion is often lower than both the Maxwell-Stefan, D(i), and the self-diffusivity, D(i,self). For water-alcohol mixtures, the hydrogen bonding between water and alcohol molecules is much more predominant than for water-water, and alcohol-alcohol molecule pairs. Consequently, the adsorption of water-alcohol mixtures shows significant deviations from the predictions of the ideal adsorbed solution theory (IAST). The water-alcohol bonding also leaves its imprint on the mixture diffusion characteristics. The Maxwell-Stefan diffusivity, D(i), of either component in water-alcohol mixtures is lower than the corresponding values of the pure components; this behavior is distinctly different from that for mixtures of nonpolar guest molecules. The binary exchange coefficient D(12) for water-alcohol mixtures is also significantly lower than either self-exchange coefficients D(11) and D(22) of the constituent species. This implies that correlation effects are significantly stronger in water-alcohol mixtures than for the constituent species. Correlation effects are found to be significant for water-alcohol mixture diffusion in DDR and LTA zeolites, even though such effects are negligible for the pure constituents. The major conclusion to emerge from this investigation is that, unlike mixtures of nonpolar molecules, it is not possible to estimate water-alcohol mixture adsorption and diffusion characteristics on the basis of pure component data.
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Affiliation(s)
- Rajamani Krishna
- Van't Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands.
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Abstract
Zeolites are aluminosilicate solids bearing a negatively charged honeycomb framework of micropores into which molecules may be adsorbed for environmental decontamination, and to catalyse chemical reactions. They are central to green-chemistry since the necessity for organic solvents is minimised. Proton-exchanged (H) zeolites are extensively employed in the petrochemical industry for cracking crude oil fractions into fuels and chemical feedstocks for other industrial processes. Due to their ability to perform cation-exchange, in which the cations that are originally present to counterbalance the framework negative charge may be exchanged out of the zeolite by cations present in aqueous solution, zeolites are useful as industrial water-softeners, in the removal of radioactive Cs+ and Sr2+ cations from liquid nuclear waste and in the removal of toxic heavy metal cations from groundwaters and run-off waters. Surfactant-modified zeolites (SMZ) find particular application in the co-removal of both toxic anions and organic pollutants. Toxic anions such as arsenite, arsenate, chromate, cyanide and radioactive iodide can also be removed by adsorption into zeolites that have been previously loaded with co-precipitating metal cations such as Ag+ and Pb2+ which form practically insoluble complexes that are contained within the zeolite matrix.
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Paranthaman S, Coudert FX, Fuchs AH. Water adsorption in hydrophobic MOF channels. Phys Chem Chem Phys 2010; 12:8123-9. [DOI: 10.1039/b925074c] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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