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Zhou W, Wang H, Yang X, Liu X, Yan Y. Confinement Effects and CO2/CH4 Competitive Adsorption in Realistic Shale Kerogen Nanopores. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.9b06549] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Wenning Zhou
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China
- Beijing Key Laboratory of Energy Conservation and Emission Reduction for Metallurgical Industry, Beijing 100083, China
| | - Haobo Wang
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Xu Yang
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Xunliang Liu
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China
- Beijing Key Laboratory of Energy Conservation and Emission Reduction for Metallurgical Industry, Beijing 100083, China
| | - Yuying Yan
- Fluids & Thermal Engineering Research Group, Faculty of Engineering, University of Nottingham, Nottingham NG7 2RD, U.K
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Shao H, Wu YC, Lin Z, Taberna PL, Simon P. Nanoporous carbon for electrochemical capacitive energy storage. Chem Soc Rev 2020; 49:3005-3039. [DOI: 10.1039/d0cs00059k] [Citation(s) in RCA: 213] [Impact Index Per Article: 53.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
This review summarizes the recent advances of nanoporous carbon materials in the application of EDLCs, including a better understanding of the charge storage mechanisms by combining the advanced techniques and simulations methods.
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Affiliation(s)
- Hui Shao
- Université Paul Sabatier
- CIRIMAT UMR CNRS 5085
- 31062 Toulouse
- France
- Réseau sur le Stockage Electrochimique de l'Energie (RS2E)
| | - Yih-Chyng Wu
- Université Paul Sabatier
- CIRIMAT UMR CNRS 5085
- 31062 Toulouse
- France
- Réseau sur le Stockage Electrochimique de l'Energie (RS2E)
| | - Zifeng Lin
- College of Materials Science and Engineering
- Sichuan University
- Chengdu 610065
- P. R. China
| | - Pierre-Louis Taberna
- Université Paul Sabatier
- CIRIMAT UMR CNRS 5085
- 31062 Toulouse
- France
- Réseau sur le Stockage Electrochimique de l'Energie (RS2E)
| | - Patrice Simon
- Université Paul Sabatier
- CIRIMAT UMR CNRS 5085
- 31062 Toulouse
- France
- Réseau sur le Stockage Electrochimique de l'Energie (RS2E)
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Furmaniak S, Terzyk AP, Kowalczyk P, Kaneko K, Gauden PA. Separation of CO2–CH4 mixtures on defective single walled carbon nanohorns – tip does matter. Phys Chem Chem Phys 2013; 15:16468-76. [DOI: 10.1039/c3cp52342j] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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Kubo T, Sakamoto H, Fujimori T, Itoh T, Ohba T, Kanoh H, Martínez-Escandell M, Ramos-Fernández JM, Casco M, Rodríguez-Reinoso F, Urita K, Moriguchi I, Endo M, Kaneko K. Diffusion-barrier-free porous carbon monoliths as a new form of activated carbon. CHEMSUSCHEM 2012; 5:2271-2277. [PMID: 23019152 DOI: 10.1002/cssc.201200234] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2012] [Revised: 06/21/2012] [Indexed: 06/01/2023]
Abstract
For the practical use of activated carbon (AC) as an adsorbent of CH(4) , tightly packed monoliths with high microporosity are supposed to be one of the best morphologies in terms of storage capacity per apparent volume of the adsorbent material. However, monolith-type ACs may cause diffusion obstacles in adsorption processes owing to their necked pore structures among the densely packed particles, which result in a lower adsorption performance than that of the corresponding powder ACs. To clarify the relationship between the pore structure and CH₄ adsorptivity, microscopic observations, structural studies on the nanoscale, and conductivity measurements (thermal and electrical) were performed on recently developed binder-free, self-sinterable ACs in both powder and monolithic forms. The monolith samples exhibited higher surface areas and electrical conductivities than the corresponding powder samples. Supercritical CH₄ adsorption isotherms were measured for each powder and monolith sample at up to 7 MPa at 263, 273, and 303 K to elucidate their isosteric heats of adsorption and adsorption rate constants, which revealed that the morphologies of the monolith samples did not cause serious drawbacks for the adsorption and desorption processes. This will further facilitate the availability of diffusion-barrier-free microporous carbon monoliths as practical CH₄ storage adsorbents.
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Affiliation(s)
- Takashi Kubo
- Department of Chemistry, Graduate School of Science, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
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Abdul Razak M, Do DD, Horikawa T, Tsuji K, Nicholson D. On the description of isotherms of CH4 and C2H4 adsorption on graphite from subcritical to supercritical conditions. ADSORPTION 2012. [DOI: 10.1007/s10450-012-9433-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Liu Z, Do D, Nicholson D. Effects of confinement on the molar enthalpy of argon adsorption in graphitic cylindrical pores: A grand canonical Monte Carlo (GCMC) simulation study. J Colloid Interface Sci 2011; 361:278-87. [DOI: 10.1016/j.jcis.2011.05.072] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2011] [Revised: 05/23/2011] [Accepted: 05/24/2011] [Indexed: 11/30/2022]
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Rejifu A, Noguchi H, Ohba T, Kanoh H, Rodriguez-Reinoso F, Kaneko K. Adsorptivities of Extremely High Surface Area Activated Carbon Fibres for CH4 and H2. ADSORPT SCI TECHNOL 2009. [DOI: 10.1260/0263-6174.27.9.877] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Affiliation(s)
- A. Rejifu
- Department of Chemistry, Graduate School of Science and Technology, Chiba University, 1-33 Yayoi, Inage, Chiba, 263-8522, Japan
| | - H. Noguchi
- Tsukuba Research Laboratories, 25 Miyukigaoka, Tsukuba, Ibaraki, 305-0841, Japan
| | - T. Ohba
- Department of Chemistry, Graduate School of Science and Technology, Chiba University, 1-33 Yayoi, Inage, Chiba, 263-8522, Japan
| | - H. Kanoh
- Department of Chemistry, Graduate School of Science and Technology, Chiba University, 1-33 Yayoi, Inage, Chiba, 263-8522, Japan
| | - F. Rodriguez-Reinoso
- Departmento de Quimica Inorgánica, Universidad de Alicante, Apdo. 99, E-3080 Alicante, Spain
| | - K. Kaneko
- Department of Chemistry, Graduate School of Science and Technology, Chiba University, 1-33 Yayoi, Inage, Chiba, 263-8522, Japan
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Hamada Y, Koga K, Tanaka H. Phase equilibria and interfacial tension of fluids confined in narrow pores. J Chem Phys 2007; 127:084908. [PMID: 17764295 DOI: 10.1063/1.2759926] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Correlation between phase behaviors of a Lennard-Jones fluid in and outside a pore is examined over wide thermodynamic conditions by grand canonical Monte Carlo simulations. A pressure tensor component of the confined fluid, a variable controllable in simulation but usually uncontrollable in experiment, is related with the pressure of a bulk homogeneous system in equilibrium with the confined system. Effects of the pore dimensionality, size, and attractive potential on the correlations between thermodynamic properties of the confined and bulk systems are clarified. A fluid-wall interfacial tension defined as an excess grand potential is evaluated as a function of the pore size. It is found that the tension decreases linearly with the inverse of the pore diameter or width.
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Affiliation(s)
- Yoshinobu Hamada
- Department of Chemistry, Faculty of Science, Okayama University, Japan
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Cai Q, Buts A, Biggs MJ, Seaton NA. Evaluation of methods for determining the pore size distribution and pore-network connectivity of porous carbons. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2007; 23:8430-40. [PMID: 17602506 DOI: 10.1021/la7007057] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
The pore size distribution (PSD) and the pore-network connectivity of a porous material determine its properties in applications such as gas storage, adsorptive separations, and catalysis. Methods for the characterization of the pore structure of porous carbons are widely used, but the relationship between the structural parameters measured and the real structure of the material is not yet clear. We have evaluated two widely used and powerful characterization methods based on adsorption measurements by applying the methods to a model carbon which captures the essential characteristics of real carbons but (unlike a real material) has a structure that is completely known. We used three species (CH4, CF4, and SF6) as adsorptives and analyzed the results using an intersecting capillaries model (ICM) which was modeled using a combination of Monte Carlo simulation and percolation theory to obtain the PSD and the pore-network connectivity. There was broad agreement between the PSDs measured using the ICM and the geometric PSD of the model carbon, as well as some systematic differences which are interpreted in terms of the pore structure of the carbon. The measured PSD and connectivity are shown to be able to predict adsorption in the model carbon, supporting the use of the ICM to characterize real porous carbons.
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Affiliation(s)
- Q Cai
- Institute for Materials and Processes, University of Edinburgh, Kenneth Denbigh Building, Mayfield Road, Edinburgh EH9 3JL, United Kingdom
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Ohba T, Kaneko K. Cluster-associated filling of water molecules in slit-shaped graphitic nanopores. Mol Phys 2007. [DOI: 10.1080/00268970701192081] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Pol SV, Pol VG, Kessler VG, Seisenbaeva GA, Solovyov LA, Gedanken A. Synthesis of WO3 Nanorods by Reacting WO(OMe)4 under Autogenic Pressure at Elevated Temperature Followed by Annealing. Inorg Chem 2005; 44:9938-45. [PMID: 16363865 DOI: 10.1021/ic051179n] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
This article reports on the fabrication of WO(3) nanorods using an efficient straightforward synthetic technique, without a catalyst, and using a single precursor. The thermal dissociation of WO(OMe)(4) at 700 degrees C in a closed Swagelok cell under an air/inert atmosphere yielded W(18)O(49) nanorods. Annealing of W(18)O(49) at 500 degrees C under an air atmosphere led to the formation of pure WO(3) nanorods. The obtained products are characterized by morphological (scanning electron microscopy and transmission electron microscopy), structural (X-ray diffraction analysis, high-resolution scanning electron microscopy, and Raman spectroscopy), and compositional [energy-dispersive X-ray and elemental (C, H, N, S) analysis] measurements. The mechanism of the formation of nonstoichiometric W(18)O(49) nanorods is supported by the measured analytical data and several control experiments.
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Affiliation(s)
- S V Pol
- Department of Chemistry and Kanbar Laboratory for Nanomaterials at the Bar-Ilan University Center for Advanced Materials and Nanotechnology, Bar-Ilan University, Ramat-Gan 52900, Israel
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Kowalczyk P, Tanaka H, Hołyst R, Kaneko K, Ohmori T, Miyamoto J. Storage of Hydrogen at 303 K in Graphite Slitlike Pores from Grand Canonical Monte Carlo Simulation. J Phys Chem B 2005; 109:17174-83. [PMID: 16853191 DOI: 10.1021/jp0529063] [Citation(s) in RCA: 92] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Grand canonical Monte Carlo (GCMC) simulations were used for the modeling of the hydrogen adsorption in idealized graphite slitlike pores. In all simulations, quantum effects were included through the Feynman and Hibbs second-order effective potential. The simulated surface excess isotherms of hydrogen were used for the determination of the total hydrogen storage, density of hydrogen in graphite slitlike pores, distribution of pore sizes and volumes, enthalpy of adsorption per mole, total surface area, total pore volume, and average pore size of pitch-based activated carbon fibers. Combining experimental results with simulations reveals that the density of hydrogen in graphite slitlike pores at 303 K does not exceed 0.014 g/cm(3), that is, 21% of the liquid-hydrogen density at the triple point. The optimal pore size for the storage of hydrogen at 303 K in the considered pore geometry depends on the pressure of storage. For lower storage pressures, p < 30MPa, the optimal pore width is equal to a 2.2 collision diameter of hydrogen (i.e., 0.65 nm), whereas, for p congruent with 50MPa, the pore width is equal to an approximately 7.2 collision diameter of hydrogen (i.e., 2.13 nm). For the wider pores, that is, the pore width exceeds a 7.2 collision diameter of hydrogen, the surface excess of hydrogen adsorption is constant. The importance of quantum effects is recognized in narrow graphite slitlike pores in the whole range of the hydrogen pressure as well as in wider ones at high pressures of bulk hydrogen. The enthalpies of adsorption per mole for the considered carbonaceous materials are practically constant with hydrogen loading and vary within the narrow range q(st) congruent with 7.28-7.85 kJ/mol. Our systematic study of hydrogen adsorption at 303 K in graphite slitlike pores gives deep insight into the timely problem of hydrogen storage as the most promising source of clean energy. The calculated maximum storage of hydrogen is equal to approximately 1.4 wt %, which is far from the United States Department of Energy (DOE) target (i.e., 6.5 wt %), thus concluding that the total storage amount of hydrogen obtained at 303 K in graphite slitlike pores of carbon fibers is not sufficient yet.
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Affiliation(s)
- Piotr Kowalczyk
- Department of Chemistry, Faculty of Science, Chiba University, 1-3 Yayoi, Chiba 263, Japan.
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Kowalczyk P, Tanaka H, Kaneko K, Terzyk AP, Do DD. Grand canonical monte carlo simulation study of methane adsorption at an open graphite surface and in slit-like carbon pores at 273 K. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2005; 21:5639-46. [PMID: 15924500 DOI: 10.1021/la050126f] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
Grand canonical Monte Carlo (GCMC) simulation was used for the systematic investigation of the supercritical methane adsorption at 273 K on an open graphite surface and in slit-like micropores of different sizes. For both considered adsorption systems the calculated excess adsorption isotherms exhibit a maximum. The effect of the pore size on the maximum surface excess and isosteric enthalpy of adsorption for methane storage at 273 K is discussed. The microscopic detailed picture of methane densification near the homogeneous graphite wall and in slit-like pores at 273 K is presented with selected local density profiles and snapshots. Finally, the reliable pore size distributions, obtained in the range of the microporosity, for two pitch-based microporous activated carbon fibers are calculated from the local excess adsorption isotherms obtained via the GCMC simulation. The current systematic study of supercritical methane adsorption both on an open graphite surface and in slit-like micropores performed by the GCMC summarizes recent investigations performed at slightly different temperatures and usually a lower pressure range by advanced methods based on the statistical thermodynamics.
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Affiliation(s)
- Piotr Kowalczyk
- Department of Chemistry, Faculty of Science, Chiba University, 1-3 Yayoi, Chiba, 263, Japan.
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Ohba T, Kanoh H, Kaneko K. Structures and stability of water nanoclusters in hydrophobic nanospaces. NANO LETTERS 2005; 5:227-230. [PMID: 15794601 DOI: 10.1021/nl048327b] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The temperature dependencies of in situ small-angle X-ray scattering (SAXS) of water adsorbed and of adsorption isotherm of water in hydrophobic carbon nanopores were measured over the temperature range of 293 to 328 K. The structures of water nanoclusters adsorbed in the nanopores were determined with the density fluctuation analysis of in situ SAXS data. The difference of the density fluctuations between adsorption and desorption was ascribed to the water structural difference. The structural transitions of the water nanoclusters were observed around 318 K for adsorption and 308 K for desorption.
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Affiliation(s)
- Tomonori Ohba
- Department of Chemistry, Faculty of Science, Chiba University, 1-33 Yayoi, Inage, Chiba 263-8522, Japan
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