1
|
Yuan T, Sarkisov L. How 2D Nanoflakes Improve Transport in Mixed Matrix Membranes: Insights from a Simple Lattice Model and Dynamic Mean Field Theory. ACS APPLIED MATERIALS & INTERFACES 2024; 16:8184-8195. [PMID: 38308600 PMCID: PMC10875652 DOI: 10.1021/acsami.4c00661] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2024] [Revised: 01/19/2024] [Accepted: 01/19/2024] [Indexed: 02/05/2024]
Abstract
Mixed matrix membranes (MMMs), incorporating graphene and graphene oxide structural fragments, have emerged as promising materials for challenging gas separation processes. What remains unclear is the actual molecular mechanism responsible for the enhanced permeability and perm-selectivity of these materials. With the fully atomistic models still unable to handle the required time and length scales, here, we employ a simple qualitative model based on the lattice representation of the physical system and dynamic mean field theory. We demonstrate that the performance enhancement results from the flux-regularization impact of the 2D nanoflakes and that this effect sensitively depends on the orientation of the nanoflakes and the properties of the interface between the nanoflakes and the polymer.
Collapse
Affiliation(s)
- Tianmu Yuan
- Department of Chemical Engineering,
Engineering Building A, The University of
Manchester, Manchester M13 9PL, U.K.
| | - Lev Sarkisov
- Department of Chemical Engineering,
Engineering Building A, The University of
Manchester, Manchester M13 9PL, U.K.
| |
Collapse
|
2
|
Rodriguez C, Torres-Costa V, Bittner A, Morin S, Cascajo Castresana M, Chiriaev S, Modin E, Chuvilin A, Manso Silván M. Electron microscopy approach to the wetting dynamics of single organosilanized mesopores. iScience 2023; 26:107981. [PMID: 37860771 PMCID: PMC10583112 DOI: 10.1016/j.isci.2023.107981] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Revised: 09/08/2023] [Accepted: 09/16/2023] [Indexed: 10/21/2023] Open
Abstract
Columnar mesoporous silicon (PSi) with hydrophobic vs. hydrophilic chemistries was chosen as a model for the local (pore-by-pore) study of water-pore interactions. Tomographic reconstructions provided a 3D view of the ramified pore structure. An in situ study of PSi wetting was conducted for categorized pore diameters by environmental scanning TEM. An appropriate setting of the contrast allows for the normalization of the gray scale in the images as a function of relative humidity (RH). This allows constructing an isotherm for each single pore and a subsequent averaging provides an isotherm for each pore size range. The isotherms systematically point to an initial adsorption through the formation of water adlayers, followed by a capillary filling process at higher RH. The local isotherms correlate with (global) gravimetric determination of wetting. Our results point at the validation of a technique for the study of aging and stability of single-pore nanoscale devices.
Collapse
Affiliation(s)
- C. Rodriguez
- Departamento de Física Aplicada, Centro de Microanálisis de Materiales and Instituto Nicolás Cabrera, Universidad Autónoma de Madrid, 28049 Madrid, Spain
- Mecwins, Roda de Poniente 15, Tres Cantos, Madrid 28760, Spain
| | - V. Torres-Costa
- Departamento de Física Aplicada, Centro de Microanálisis de Materiales and Instituto Nicolás Cabrera, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - A.M. Bittner
- CIC nanoGUNE, 20018 Donostia-San Sebastián, Spain
- Ikerbasque, Basque Foundation for Science, 48013 Bilbao, Spain
| | - S. Morin
- CIC nanoGUNE, 20018 Donostia-San Sebastián, Spain
- Department of Chemistry, York University, 4700 Keele Street, Toronto M3J 1P3, Canada
| | - M. Cascajo Castresana
- CIC nanoGUNE, 20018 Donostia-San Sebastián, Spain
- Tecnalia, 20009 Donostia-San Sebastián, Spain
| | - S. Chiriaev
- Mads Clausen Institute, University of Southern Denmark, 6400 Sønderborg, Denmark
| | - E. Modin
- CIC nanoGUNE, 20018 Donostia-San Sebastián, Spain
| | - A. Chuvilin
- CIC nanoGUNE, 20018 Donostia-San Sebastián, Spain
- Ikerbasque, Basque Foundation for Science, 48013 Bilbao, Spain
| | - M. Manso Silván
- Departamento de Física Aplicada, Centro de Microanálisis de Materiales and Instituto Nicolás Cabrera, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| |
Collapse
|
3
|
Zelenka T, Horikawa T, Do DD. Artifacts and misinterpretations in gas physisorption measurements and characterization of porous solids. Adv Colloid Interface Sci 2023; 311:102831. [PMID: 36586219 DOI: 10.1016/j.cis.2022.102831] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Revised: 12/20/2022] [Accepted: 12/23/2022] [Indexed: 12/27/2022]
Abstract
This contribution provides a critical review of gas physisorption in the textural characterization of porous solids, with the focus on the artifacts in experimental data that lead to serious misinterpretation of the results derived from the analysis of adsorption isotherms. Apart from the problems related to the determination and interpretation of the BET area, we paid particular attention to the issues associated with the determination of pore size distribution; for example, the choice of the correct branch of the hysteresis loop and the network effects. Pitfalls in the analyses using either the classical macroscopic or the advanced microscopic (DFT, GCMC) methodology are addressed. The ultimate aim is to provide guidance for proper calculations and correct interpretation of physisorption data.
Collapse
Affiliation(s)
- Tomáš Zelenka
- Department of Chemistry, Faculty of Science, University of Ostrava, 30. dubna 22, 70103 Ostrava, Czech Republic.
| | - Toshihide Horikawa
- Graduate School of Technology, Industrial and Social Sciences, University of Tokushima, 2-1, Minamijosanjima, Tokushima 770-8506, Japan.
| | - D D Do
- School of Chemical Engineering, University of Queensland, St. Lucia, QLD, 4072, Australia.
| |
Collapse
|
4
|
Yuan T, Sarkisov L. Lattice Model of Fluid Transport in Mixed Matrix Membranes. ADVANCED THEORY AND SIMULATIONS 2022. [DOI: 10.1002/adts.202200159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Tianmu Yuan
- Department of Chemical Engineering The University of Manchester Manchester M1 3AL UK
| | - Lev Sarkisov
- Department of Chemical Engineering The University of Manchester Manchester M1 3AL UK
| |
Collapse
|
5
|
Catalytic Conversion of Glycerol into Hydrogen and Value-Added Chemicals: Recent Research Advances. Catalysts 2021. [DOI: 10.3390/catal11121455] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
In recent decades, the use of biomass as alternative resources to produce renewable and sustainable biofuels such as biodiesel has gained attention given the situation of the progressive exhaustion of easily accessible fossil fuels, increasing environmental concerns, and a dramatically growing global population. The conventional transesterification of edible, nonedible, or waste cooking oils to produce biodiesel is always accompanied by the formation of glycerol as the by-product. Undeniably, it is essential to economically use this by-product to produce a range of valuable fuels and chemicals to ensure the sustainability of the transesterification process. Therefore, recently, glycerol has been used as a feedstock for the production of value-added H2 and chemicals. In this review, the recent advances in the catalytic conversion of glycerol to H2 and high-value chemicals are thoroughly discussed. Specifically, the activity, stability, and recyclability of the catalysts used in the steam reforming of glycerol for H2 production are covered. In addition, the behavior and performance of heterogeneous catalysts in terms of the roles of active metal and support toward the formation of acrolein, lactic acid, 1,3-propanediol, and 1,2-propanediol from glycerol are reviewed. Recommendations for future research and main conclusions are provided. Overall, this review offers guidance and directions for the sufficient and economical utilization of glycerol to generate fuels and high value chemicals, which will ultimately benefit industry, environment, and economy.
Collapse
|
6
|
Yuan T, Farmahini AH, Sarkisov L. Application of the dynamic mean field theory to fluid transport in slit pores. J Chem Phys 2021; 155:074702. [PMID: 34418941 DOI: 10.1063/5.0060776] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
We explore the applicability of the lattice model and dynamic mean field theory as a computationally efficient tool to study transport across heterogeneous porous media, such as mixed matrix membranes. As a starting point and to establish some basic definitions of properties analogous to those in the off-lattice systems, we consider transport across simple models of porous materials represented by a slit pore in a chemical potential gradient. Using this simple model, we investigate the distribution of density and flux under steady state conditions, define the permeability across the system, and explore how this property depends on the length of the pore and the solid-fluid interactions. Among other effects, we observe that the flux in the system goes through a maximum as the solid-fluid interaction is varied from weak to strong. This effect is dominated by the behavior of the fluid near the walls and is also confirmed by off-lattice molecular dynamics simulations. We further extend this study to explore transport across heterogeneous slit pore channels composed of two solids with different values of solid-fluid interaction strengths. We demonstrate that the lattice models and dynamic mean field theory provide a useful framework to pose questions on the accuracy and applicability of the classical theories of transport across heterogeneous porous systems.
Collapse
Affiliation(s)
- Tianmu Yuan
- The Department of Chemical Engineering and Analytical Science, The University of Manchester, Manchester M13 9PL, United Kingdom
| | - Amir H Farmahini
- The Department of Chemical Engineering and Analytical Science, The University of Manchester, Manchester M13 9PL, United Kingdom
| | - Lev Sarkisov
- The Department of Chemical Engineering and Analytical Science, The University of Manchester, Manchester M13 9PL, United Kingdom
| |
Collapse
|
7
|
Ryabina AV, Shevchenko VG. Adsorption and Structural Properties of ASD-4 Powder after Surface Modification with Mn, Fe, Co, and Ni Formates. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2020. [DOI: 10.1134/s003602442011028x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
8
|
Ali B, Lan X, Arslan MT, Gilani SZA, Wang H, Wang T. Controlling the selectivity and deactivation of H-ZSM-5 by tuning b-axis channel length for glycerol dehydration to acrolein. J IND ENG CHEM 2020. [DOI: 10.1016/j.jiec.2020.03.037] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
9
|
Tan SJ, Loi QK, Do DD, Nicholson D. On the canonical isotherms for bulk fluid, surface adsorption and adsorption in pores: A common thread. J Colloid Interface Sci 2019; 548:25-36. [PMID: 30978593 DOI: 10.1016/j.jcis.2019.04.018] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2019] [Revised: 03/06/2019] [Accepted: 04/05/2019] [Indexed: 11/18/2022]
Abstract
Kinetic Monte Carlo simulated isotherms calculated in the canonical ensemble, at temperatures below the critical temperature, for bulk fluid, surface adsorption and adsorption in a confined space, show a van der Waals (vdW) loop with a vertical phase transition between the rarefied and dense spinodal points at the co-existence chemical potential, µco. Microscopic examination of the state points on this loop reveals features that are common to these systems. At state points with chemical potentials greater than μco the microscopic configurations show clusters, which coalesce to form two co-existing phases along the vertical section of the loop (the coexistence line). As more molecules are added, the dense region expands at the expense of the rarefied region, to the point where the rarefied region becomes spherical (cylindrical for 2D-systems) with a curvature greater than that of the coexisting phases. This results in a decrease of chemical potential from µco to the liquid spinodal point where the rarefied region disappears. With a further increase in loading, the chemical potential and the density increase. The existence of a vdW loop is the microscopic reason for the hysteresis observed in the grand canonical isotherm, where the adsorption and desorption boundaries of the hysteresis loop are first-order transitions, enclosing the vertical section of the vdW loop of the canonical isotherm. However, a first-order transition is rarely observed in experiments where transitions are usually steep, but not vertical. From our extensive simulations, we provide two possible reasons: (1) the finite extent of the system and (2) the existence of high energy sites that localize the clusters. In the first case, the desorption branch, and in the second case the adsorption branch, either comes close to, or collapses onto the coexistence line. When both occur, the hysteresis loop disappears and the isotherm is reversible, as often observed experimentally.
Collapse
Affiliation(s)
- Shiliang Johnathan Tan
- School of Chemical Engineering, University of Queensland, St. Lucia, Qld 4072, Australia
| | - Quang K Loi
- School of Chemical Engineering, University of Queensland, St. Lucia, Qld 4072, Australia
| | - D D Do
- School of Chemical Engineering, University of Queensland, St. Lucia, Qld 4072, Australia.
| | - D Nicholson
- School of Chemical Engineering, University of Queensland, St. Lucia, Qld 4072, Australia
| |
Collapse
|
10
|
Tan SJ, Prasetyo L, Do DD, Nicholson D. On the growth of argon clusters on a weak adsorbent decorated with patches. J Colloid Interface Sci 2019; 537:431-440. [PMID: 30465978 DOI: 10.1016/j.jcis.2018.11.027] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2018] [Revised: 11/08/2018] [Accepted: 11/09/2018] [Indexed: 11/17/2022]
Abstract
Much attention has been paid to understanding the clustering mechanism of water adsorbed on carbonaceous adsorbents. Adsorbed water forms clusters around strong sites, such as functional groups and surface defects, and these clusters then coalesce if the strong sites are sufficiently close to each other. Simulations of water adsorption are notoriously time consuming because of the slow relaxation of the strongly-directional hydrogen bonds. Our objective in this paper is to gain a better insight into clustering and coalescence of water, without incurring large computing overheads. To this end we have chosen argon as an adsorbate, and a substrate that is a very weak adsorbent for argon. To mimic functional groups, the substrate surface is decorated with strongly adsorbing patches. The adsorbate forms nano-clusters with convex surfaces at pressures greater than the saturation vapour pressure. When these clusters are sufficiently close to each other, they coalescence to form larger fused clusters, and there is a decrease in the equilibrium pressure. The relationship between the radius of curvature of the developed nano-clusters and the equilibrium pressure follows the functional form of the Kelvin equation, but the energy parameterγvM is smaller than the bulk value, implying that the clusters have a smaller cohesive energy.
Collapse
Affiliation(s)
- Shiliang Johnathan Tan
- School of Chemical Engineering, University of Queensland, St. Lucia, Qld 4072, Australia
| | - Luisa Prasetyo
- School of Chemical Engineering, University of Queensland, St. Lucia, Qld 4072, Australia
| | - D D Do
- School of Chemical Engineering, University of Queensland, St. Lucia, Qld 4072, Australia.
| | - D Nicholson
- School of Chemical Engineering, University of Queensland, St. Lucia, Qld 4072, Australia
| |
Collapse
|
11
|
Ryabina AV, Shevchenko VG. Adsorption Properties of an Aluminum Powder Modified with Vanadium Pentoxide. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2018. [DOI: 10.1134/s0036024418110341] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
12
|
Xiang M, Wu D. Transition metal-promoted hierarchical ETS-10 solid base for glycerol transesterification. RSC Adv 2018; 8:33473-33486. [PMID: 35548135 PMCID: PMC9086472 DOI: 10.1039/c8ra06811a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2018] [Accepted: 09/22/2018] [Indexed: 11/28/2022] Open
Abstract
A transesterification reaction has been carried out over a transition metal modified hierarchical ETS-10 (METS-10) catalyst to synthesize glycerol carbonate (GC) from glycerol. The inherent Lewis basicity of ETS-10 favors oriented conversion of glycerol, and the hierarchical structure benefits exposure of more active sites, shortens the molecular diffusion path, suppresses the formation of coke in the micropores, and then enhances the catalytic reactivity and stability. Furthermore, the influence of transition metals (Fe, Co, Ni, Cu, Zn and Mn) on the basic sites of supports has been investigated in detail. It is found that basicity change of the catalyst depends on not only the cation size, nature and composition of the transition metal but also the zeolite structure and pore topology. Besides, the presence of a certain amount of Ni0 species from catalyst reduction has proved to play a critical role in strengthening the interaction of Lewis basic sites (TiO62−) with active glycerol hydroxyl groups. Finally, a 97.7% glycerol conversion and 97.1% GC yield have been obtained over Ni/METS-10, of which the high catalytic performance can be maintained after 8 runs. The inherent Lewis basicity and hierarchical structure of ETS-10 favor oriented conversion of glycerol. Moreover, Ni0 species play a critical role in accelerating the interaction of Lewis basic sites with active glycerol hydroxyl groups.![]()
Collapse
Affiliation(s)
- Mei Xiang
- Department of Chemical Engineering, School of Chemistry and Chemical Engineering, Southeast University Jiangning District Nanjing 211189 China
| | - Dongfang Wu
- Department of Chemical Engineering, School of Chemistry and Chemical Engineering, Southeast University Jiangning District Nanjing 211189 China
| |
Collapse
|
13
|
Muthusami R, Moorthy M, Irena K, Govindaraj A, Manickam C, Rangappan R. Designing a biomimetic catalyst for phenoxazinone synthase activity using a mesoporous Schiff base copper complex with a novel double-helix morphology. NEW J CHEM 2018. [DOI: 10.1039/c8nj03638a] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A mesoporous copper complex was synthesized with a novel double helix morphology and successfully utilized as a biomimetic catalyst for phenoxazinone synthase activity.
Collapse
Affiliation(s)
| | | | - Kostova Irena
- Department of Chemistry
- Faculty of Pharmacy
- Medical University
- Sofia 1000
- Bulgaria
| | | | | | | |
Collapse
|
14
|
Liu L, Tan S(J, Horikawa T, Do D, Nicholson D, Liu J. Water adsorption on carbon - A review. Adv Colloid Interface Sci 2017; 250:64-78. [PMID: 29129312 DOI: 10.1016/j.cis.2017.10.002] [Citation(s) in RCA: 76] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2017] [Revised: 10/18/2017] [Accepted: 10/22/2017] [Indexed: 10/18/2022]
Abstract
Water adsorption on carbonaceous materials has been studied increasingly in the recent years, not only because of its impact on many industrial processes, but also motivated by a desire to understand, at a fundamental level, the distinctive character of directional interactions between water molecules, and between water molecules and other polar groups, such as the functional groups (FGs) at the surfaces of graphene layers. This paper presents an extensive review of recent experimental and theoretical work on water adsorption on various carbonaceous materials, with the aim of gaining a better understanding of how water adsorption in carbonaceous materials relates to the concentration of FGs, their topology (arrangement of the groups) and the structure of the confined space in porous carbons. Arising from this review we are able to propose mechanisms for water adsorption in carbonaceous materials as the adsorbate density increases. The intricate interplay between the roles of FGs and confinement makes adsorption of water on carbon materials very different from that of other simple molecules.
Collapse
|
15
|
Cychosz KA, Guillet-Nicolas R, García-Martínez J, Thommes M. Recent advances in the textural characterization of hierarchically structured nanoporous materials. Chem Soc Rev 2017; 46:389-414. [DOI: 10.1039/c6cs00391e] [Citation(s) in RCA: 603] [Impact Index Per Article: 86.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
This review focuses on important aspects of applying physisorption for the pore structural characterization of hierarchical materials such as mesoporous zeolites.
Collapse
Affiliation(s)
| | | | - Javier García-Martínez
- University of Alicante
- Department of Inorganic Chemistry
- Campus de San Vicente del Raspeig
- Alicante
- Spain
| | | |
Collapse
|
16
|
Zeidman BD, Lu N, Wu DT. Hysteresis of liquid adsorption in porous media by coarse-grained Monte Carlo with direct experimental validation. J Chem Phys 2016; 144:174709. [PMID: 27155649 DOI: 10.1063/1.4948437] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
The effects of path-dependent wetting and drying manifest themselves in many types of physical systems, including nanomaterials, biological systems, and porous media such as soil. It is desirable to better understand how these hysteretic macroscopic properties result from a complex interplay between gasses, liquids, and solids at the pore scale. Coarse-Grained Monte Carlo (CGMC) is an appealing approach to model these phenomena in complex pore spaces, including ones determined experimentally. We present two-dimensional CGMC simulations of wetting and drying in two systems with pore spaces determined by sections from micro X-ray computed tomography: a system of randomly distributed spheres and a system of Ottawa sand. Results for the phase distribution, water uptake, and matric suction when corrected for extending to three dimensions show excellent agreement with experimental measurements on the same systems. This supports the hypothesis that CGMC can generate metastable configurations representative of experimental hysteresis and can also be used to predict hysteretic constitutive properties of particular experimental systems, given pore space images.
Collapse
Affiliation(s)
- Benjamin D Zeidman
- Department of Chemistry, Colorado School of Mines, Golden, Colorado 80401, USA
| | - Ning Lu
- Department of Civil and Environmental Engineering, Colorado School of Mines, Golden, Colorado 80401, USA
| | - David T Wu
- Department of Chemistry, Colorado School of Mines, Golden, Colorado 80401, USA
| |
Collapse
|
17
|
Zhang H, Hu Z, Huang L, Zhang H, Song K, Wang L, Shi Z, Ma J, Zhuang Y, Shen W, Zhang Y, Xu H, Tang Y. Dehydration of Glycerol to Acrolein over Hierarchical ZSM-5 Zeolites: Effects of Mesoporosity and Acidity. ACS Catal 2015. [DOI: 10.1021/cs5019953] [Citation(s) in RCA: 131] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Hongbin Zhang
- Department
of Chemistry, Laboratory of Advanced Materials, Shanghai Key Laboratory
of Molecular Catalysis and Innovative Materials and Collaborative
Innovation Center of Chemistry for Energy Materials, Fudan University, Shanghai 200433, China
| | - Zhijie Hu
- Department
of Chemistry, Laboratory of Advanced Materials, Shanghai Key Laboratory
of Molecular Catalysis and Innovative Materials and Collaborative
Innovation Center of Chemistry for Energy Materials, Fudan University, Shanghai 200433, China
| | - Liang Huang
- Department
of Chemistry, Laboratory of Advanced Materials, Shanghai Key Laboratory
of Molecular Catalysis and Innovative Materials and Collaborative
Innovation Center of Chemistry for Energy Materials, Fudan University, Shanghai 200433, China
| | - Hongxia Zhang
- Department
of Chemistry, Laboratory of Advanced Materials, Shanghai Key Laboratory
of Molecular Catalysis and Innovative Materials and Collaborative
Innovation Center of Chemistry for Energy Materials, Fudan University, Shanghai 200433, China
| | - Kunshan Song
- Department
of Chemistry, Laboratory of Advanced Materials, Shanghai Key Laboratory
of Molecular Catalysis and Innovative Materials and Collaborative
Innovation Center of Chemistry for Energy Materials, Fudan University, Shanghai 200433, China
| | - Lei Wang
- Department
of Chemistry, Laboratory of Advanced Materials, Shanghai Key Laboratory
of Molecular Catalysis and Innovative Materials and Collaborative
Innovation Center of Chemistry for Energy Materials, Fudan University, Shanghai 200433, China
| | - Zhangping Shi
- Department
of Chemistry, Laboratory of Advanced Materials, Shanghai Key Laboratory
of Molecular Catalysis and Innovative Materials and Collaborative
Innovation Center of Chemistry for Energy Materials, Fudan University, Shanghai 200433, China
| | - Jianxue Ma
- Shanghai Huayi Acrytic Acid Co., Ltd., Shanghai 200137, China
| | - Yan Zhuang
- Shanghai Huayi Acrytic Acid Co., Ltd., Shanghai 200137, China
| | - Wei Shen
- Department
of Chemistry, Laboratory of Advanced Materials, Shanghai Key Laboratory
of Molecular Catalysis and Innovative Materials and Collaborative
Innovation Center of Chemistry for Energy Materials, Fudan University, Shanghai 200433, China
| | - Yahong Zhang
- Department
of Chemistry, Laboratory of Advanced Materials, Shanghai Key Laboratory
of Molecular Catalysis and Innovative Materials and Collaborative
Innovation Center of Chemistry for Energy Materials, Fudan University, Shanghai 200433, China
| | - Hualong Xu
- Department
of Chemistry, Laboratory of Advanced Materials, Shanghai Key Laboratory
of Molecular Catalysis and Innovative Materials and Collaborative
Innovation Center of Chemistry for Energy Materials, Fudan University, Shanghai 200433, China
| | - Yi Tang
- Department
of Chemistry, Laboratory of Advanced Materials, Shanghai Key Laboratory
of Molecular Catalysis and Innovative Materials and Collaborative
Innovation Center of Chemistry for Energy Materials, Fudan University, Shanghai 200433, China
| |
Collapse
|
18
|
Abstract
Partial pseudomorphic transformation of SBA-15 yields bimodal mesoporous silica with defined bottlenecks that restrict the access to the core of the particles.
Collapse
Affiliation(s)
- M. J. Reber
- Institute of Chemistry and Biological Chemistry
- Zürich University of Applied Sciences
- CH-8820 Wädenswil
- Switzerland
| | - D. Brühwiler
- Institute of Chemistry and Biological Chemistry
- Zürich University of Applied Sciences
- CH-8820 Wädenswil
- Switzerland
| |
Collapse
|
19
|
Suh D, Yasuoka K, Zeng XC. Molecular dynamics simulation of heterogeneous nucleation on nanotubes. RSC Adv 2015. [DOI: 10.1039/c5ra04398k] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Condensation rate inside and outside the tube depends on the pore diameter and length.
Collapse
Affiliation(s)
- Donguk Suh
- Department of Mechanical Engineering
- Keio University
- Yokohama, Japan
| | - Kenji Yasuoka
- Department of Mechanical Engineering
- Keio University
- Yokohama, Japan
| | - Xiao Cheng Zeng
- Department of Chemistry
- University of Nebraska-Lincoln
- Lincoln, USA
| |
Collapse
|
20
|
Becker S, Urbassek HM, Horsch M, Hasse H. Contact angle of sessile drops in Lennard-Jones systems. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:13606-13614. [PMID: 25329011 DOI: 10.1021/la503974z] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Molecular dynamics simulations are used for studying the contact angle of nanoscale sessile drops on a planar solid wall in a system interacting via the truncated and shifted Lennard-Jones potential. The entire range between total wetting and dewetting is investigated by varying the solid-fluid dispersive interaction energy. The temperature is varied between the triple point and the critical temperature. A correlation is obtained for the contact angle in dependence of the temperature and the dispersive interaction energy. Size effects are studied by varying the number of fluid particles at otherwise constant conditions, using up to 150,000 particles. For particle numbers below 10,000, a decrease of the contact angle is found. This is attributed to a dependence of the solid-liquid surface tension on the droplet size. A convergence to a constant contact angle is observed for larger system sizes. The influence of the wall model is studied by varying the density of the wall. The effective solid-fluid dispersive interaction energy at a contact angle of θ = 90° is found to be independent of temperature and to decrease linearly with the solid density. A correlation is developed that describes the contact angle as a function of the dispersive interaction, the temperature, and the solid density. The density profile of the sessile drop and the surrounding vapor phase is described by a correlation combining a sigmoidal function and an oscillation term.
Collapse
Affiliation(s)
- Stefan Becker
- Laboratory of Engineering Thermodynamics, University of Kaiserslautern , Erwin-Schrödinger-Straße 44, 67663 Kaiserslautern, Germany , and
| | | | | | | |
Collapse
|
21
|
Li X, Fan X, Brandani S. Difference in pore contact angle and the contact angle measured on a flat surface and in an open space. Chem Eng Sci 2014. [DOI: 10.1016/j.ces.2014.06.024] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
22
|
|
23
|
Doan QT, Lefèvre G, Hurisse O, Coudert FX. Adsorption in complex porous networks with geometrical and chemical heterogeneity. MOLECULAR SIMULATION 2013. [DOI: 10.1080/08927022.2013.844344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Quang-Tri Doan
- Chimie ParisTech & CNRS, UMR 7575, 11 rue Pierre et Marie Curie, 75005, Paris, France
| | - Grégory Lefèvre
- Chimie ParisTech & CNRS, UMR 7575, 11 rue Pierre et Marie Curie, 75005, Paris, France
| | - Olivier Hurisse
- EDF R&D, Fluid Dynamics, Power Generation and Environment, 6 quai Watier, 78401, Chatou, France
| | | |
Collapse
|
24
|
Fan C, Do DD, Nicholson D. Condensation and Evaporation in Capillaries with Nonuniform Cross Sections. Ind Eng Chem Res 2013. [DOI: 10.1021/ie402549z] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Chunyan Fan
- School of Chemical Engineering, University of Queensland, St.
Lucia, Queensland 4072, Australia
| | - D. D. Do
- School of Chemical Engineering, University of Queensland, St.
Lucia, Queensland 4072, Australia
| | - D. Nicholson
- School of Chemical Engineering, University of Queensland, St.
Lucia, Queensland 4072, Australia
| |
Collapse
|
25
|
|
26
|
Schoenecker PM, Carson CG, Jasuja H, Flemming CJJ, Walton KS. Effect of Water Adsorption on Retention of Structure and Surface Area of Metal–Organic Frameworks. Ind Eng Chem Res 2012. [DOI: 10.1021/ie202325p] [Citation(s) in RCA: 410] [Impact Index Per Article: 34.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Paul M. Schoenecker
- School of
Chemical and Biomolecular Engineering, Georgia Institute of Technology, 311 Ferst Drive NW,
Atlanta, Georgia 30332, United States
| | - Cantwell G. Carson
- School of
Chemical and Biomolecular Engineering, Georgia Institute of Technology, 311 Ferst Drive NW,
Atlanta, Georgia 30332, United States
| | - Himanshu Jasuja
- School of
Chemical and Biomolecular Engineering, Georgia Institute of Technology, 311 Ferst Drive NW,
Atlanta, Georgia 30332, United States
| | - Christine J. J. Flemming
- School of
Chemical and Biomolecular Engineering, Georgia Institute of Technology, 311 Ferst Drive NW,
Atlanta, Georgia 30332, United States
| | - Krista S. Walton
- School of
Chemical and Biomolecular Engineering, Georgia Institute of Technology, 311 Ferst Drive NW,
Atlanta, Georgia 30332, United States
| |
Collapse
|
27
|
Horikawa T, Do DD, Nicholson D. Capillary condensation of adsorbates in porous materials. Adv Colloid Interface Sci 2011; 169:40-58. [PMID: 21937014 DOI: 10.1016/j.cis.2011.08.003] [Citation(s) in RCA: 161] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2011] [Revised: 08/26/2011] [Accepted: 08/27/2011] [Indexed: 11/30/2022]
Abstract
Hysteresis in capillary condensation is important for the fundamental study and application of porous materials, and yet experiments on porous materials are sometimes difficult to interpret because of the many interactions and complex solid structures involved in the condensation and evaporation processes. Here we make an overview of the significant progress in understanding capillary condensation and hysteresis phenomena in mesopores that have followed from experiment and simulation applied to highly ordered mesoporous materials such as MCM-41 and SBA-15 over the last few decades.
Collapse
Affiliation(s)
- Toshihide Horikawa
- School of Chemical Engineering, University of Queensland, St. Lucia, Qld 4072, Australia
| | | | | |
Collapse
|
28
|
Kierlik E, Leoni F, Rosinberg M, Tarjus G. Spontaneous imbibition in a slit pore: a lattice–gas dynamic mean field study. Mol Phys 2011. [DOI: 10.1080/00268976.2011.552443] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
29
|
Monson P. Fluids Confined in Porous Materials: Towards a Unified Understanding of Thermodynamics and Dynamics. CHEM-ING-TECH 2011. [DOI: 10.1002/cite.201000181] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
30
|
Horsch M, Heitzig M, Dan C, Harting J, Hasse H, Vrabec J. Contact angle dependence on the fluid-wall dispersive energy. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:10913-10917. [PMID: 20515052 DOI: 10.1021/la1008363] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Menisci of the truncated and shifted Lennard-Jones fluid between parallel planar walls are investigated by molecular dynamics simulation. Thereby, the characteristic energy of the unlike dispersive interaction between fluid molecules and wall atoms is systematically varied to determine its influence on the contact angle. The temperature is varied as well, covering most of the range between the triple-point temperature and the critical temperature of the bulk fluid. The transition between obtuse and acute angles is found to occur at a temperature-independent magnitude of the fluid-wall dispersive interaction energy. On the basis of the present simulation results, fluid-wall interaction potentials can be adjusted to contact angle measurements.
Collapse
Affiliation(s)
- Martin Horsch
- Thermodynamics and Energy Technology, Universität Paderborn, Warburger Strasse 100, 33098 Paderborn, Germany
| | | | | | | | | | | |
Collapse
|
31
|
|
32
|
Microscopic description of a drop on a solid surface. Adv Colloid Interface Sci 2010; 157:1-33. [PMID: 20362270 DOI: 10.1016/j.cis.2010.02.011] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2009] [Accepted: 02/20/2010] [Indexed: 11/22/2022]
Abstract
Two approaches recently suggested for the treatment of macro- or nanodrops on smooth or rough, planar or curved, solid surfaces, based on fluid-fluid and fluid-solid interaction potentials are reviewed. The first one employs the minimization of the total potential energy of a drop by assuming that the drop has a well defined profile and a constant liquid density in its entire volume with the exception of the monolayer nearest to the surface where the density has a different value. As a result, a differential equation for the drop profile as well as the necessary boundary conditions are derived which involve the parameters of the interaction potentials and do not contain such macroscopic characteristics as the surface tensions. As a consequence, the macroscopic and microscopic contact angles which the drop profile makes with the surface can be calculated. The macroscopic angle is obtained via the extrapolation of the circular part of the drop profile valid at some distance from the surface up to the solid surface. The microscopic angle is formed at the intersection of the real profile (which is not circular near the surface) with the surface. The theory provides a relation between these two angles. The ranges of the microscopic parameters of the interaction potentials for which (i) the drop can have any height (volume), (ii) the drop can have a restricted height but unrestricted volume, and (iii) a drop cannot be formed on the surface were identified. The theory was also extended to the description of a drop on a rough surface. The second approach is based on a nonlocal density functional theory (DFT), which accounts for the inhomogeneity of the liquid density and temperature effects, features which are missing in the first approach. Although the computational difficulties restrict its application to drops of only several nanometers, the theory can be applied indirectly to macrodrops by calculating the surface tensions and using the Young equation to determine the contact angle. Employing the canonical ensemble version of the DFT, nanodrops on smooth and rough solid surfaces could be investigated and their characteristics, such as the drop profile, contact angle, as well as the fluid density distribution inside the drop can be determined as functions of the parameters of the interaction potentials and temperature. It was found that the contact angle of the drop has a simple (quasi)universal dependence on the energy parameter epsilon(fs) of the fluid-solid interaction potential and temperature. The main feature of this dependence is the existence of a fixed value theta(0) of the contact angle theta which separates the solid substrates (characterized by the energy parameter epsilon(fs) of the fluid-solid interaction potential) into two classes with respect to their temperature dependence. For theta>theta(0) the contact angle monotonously increases and for theta<theta(0) monotonously decreases with increasing temperature. For theta=theta(0) the contact angle is independent of temperature. The results obtained via DFT were also applied to check the validity of the macroscopic phenomenological equations (Cassie-Baxter and Wenzel equations) for drops on rough surfaces, and of the equation for the sticking force of a drop on an inclined surface.
Collapse
|
33
|
Edison JR, Monson PA. Dynamic mean field theory of condensation and evaporation processes for fluids in porous materials: Application to partial drying and drying. Faraday Discuss 2010; 146:167-84; discussion 195-215, 395-403. [DOI: 10.1039/b925672e] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
34
|
Naumov S, Valiullin R, Kärger J, Monson PA. Understanding adsorption and desorption processes in mesoporous materials with independent disordered channels. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2009; 80:031607. [PMID: 19905123 DOI: 10.1103/physreve.80.031607] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2009] [Indexed: 05/28/2023]
Abstract
Using a lattice-gas model in mean-field theory, we discuss the problem of how adsorption and desorption of fluids in independent cylinderlike pores is influenced by variations in the pore diameter along the length of the pore, surface roughness of the pore walls, and chemical heterogeneity. We also consider the impact of contact with the bulk phase via the pore opening and the possibility of interactions between neighboring pores via a liquid film on the external surface of the material. We find that a combination of pore size variation along the length of the pore and surface roughness yields sorption hysteresis similar to that found in systems with three-dimensional disordered pore networks such as porous glasses. Our results are especially relevant to adsorption and desorption in porous silicon materials with independent linear pores and apparently anomalous features of the behavior in these systems can be accounted for within the context of the present model.
Collapse
Affiliation(s)
- Sergej Naumov
- Fakultät für Physik und Geowissenschaften, Univerität Leipzig, D-04103 Leipzig, Germany
| | | | | | | |
Collapse
|
35
|
Jana S, Singh JK, Kwak SK. Vapor-liquid critical and interfacial properties of square-well fluids in slit pores. J Chem Phys 2009; 130:214707. [DOI: 10.1063/1.3148884] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
|
36
|
Men Y, Yan Q, Jiang G, Zhang X, Wang W. Nucleation and hysteresis of vapor-liquid phase transitions in confined spaces: effects of fluid-wall interaction. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2009; 79:051602. [PMID: 19518462 DOI: 10.1103/physreve.79.051602] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2008] [Revised: 02/24/2009] [Indexed: 05/27/2023]
Abstract
In this work, we propose a method to stabilize a nucleus in the framework of lattice density-functional theory (LDFT) by imposing a suitable constraint. Using this method, the shape of critical nucleus and height of the nucleation barrier can be determined without using a predefined nucleus as input. As an application of this method, we study the nucleation behavior of vapor-liquid transition in nanosquare pores with infinite length and relate the observed hysteresis loop on an adsorption isotherm to the nucleation mechanism. According to the dependence of hysteresis and the nucleation mechanism on the fluid-wall interaction, w , in this work, we have classified w into three regions ( w>0.9 , 0.1< or =w< or =0.9 , and w<0.1 ), which are denoted as strongly, moderately, and weakly attractive fluid-wall interaction, respectively. The dependence of hysteresis on the fluid-wall interaction is interpreted by the different nucleation mechanisms. Our constrained LDFT calculations also show that the different transition paths may induce different nucleation behaviors. The transition path dependence should be considered if morphological transition of nuclei exists during a nucleation process.
Collapse
Affiliation(s)
- Yumei Men
- Division of Molecular and Materials Simulation, Key Laboratory for Nanomaterials, Ministry of Education, Beijing University of Chemical Technology, Beijing 100029, China
| | | | | | | | | |
Collapse
|