1
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Ezure R, Arai Y, Nakano D, Komatsu H, Tajima H. Novel SF6 gas concentration method using hydrate-based gas uptake and sweating process. Sep Purif Technol 2023. [DOI: 10.1016/j.seppur.2022.122441] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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2
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Park KH, Kim DH, Cha M. Structure identification of binary (cyclic alcohol guests + methane) clathrate hydrates using Rietveld analysis with the direct space method. Chem Phys Lett 2022. [DOI: 10.1016/j.cplett.2022.140054] [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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3
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Structure determination of clathrate hydrates formed from alcoholic guests with NH4F and H2O. KOREAN J CHEM ENG 2022. [DOI: 10.1007/s11814-021-1044-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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4
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5
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Park KH, Kim DH, Cha M. Spectroscopic identifications of structure II hydrate with new large alcohol guest molecule (Cyclopentanemethanol). Chem Phys Lett 2021. [DOI: 10.1016/j.cplett.2021.138869] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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6
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Abstract
Hydrogen is recognized as the "future fuel" and the most promising alternative of fossil fuels due to its remarkable properties including exceptionally high energy content per unit mass (142 M J / k g ), low mass density, and massive environmental and economical upsides. A wide spectrum of methods in H 2 production, especially carbon-free approaches, H 2 purification, and H 2 storage have been investigated to bring this energy source closer to the technological deployment. Hydrogen hydrates are among the most intriguing material paradigms for H 2 storage due to their appealing properties such as low energy consumption for charge and discharge, safety, cost-effectiveness, and favorable environmental features. Here, we comprehensively discuss the progress in understanding of hydrogen clathrate hydrates with an emphasis on charging/discharging rate of H 2 (i.e. hydrate formation and dissociation rates) and the storage capacity. A thorough understanding on phase equilibrium of the hydrates and its variation through different materials is provided. The path toward ambient temperature and pressure hydrogen batteries with high storage capacity is elucidated. We suggest that the charging rate of H 2 in this storage medium and long cyclic performance are more immediate challenges than storage capacity for technological translation of this storage medium. This review and provided outlook establish a groundwork for further innovation on hydrogen hydrate systems for promising future of hydrogen fuel.
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Affiliation(s)
- Ali Davoodabadi
- Department of Mechanical Engineering, University of Houston, 4726 Calhoun Road, Houston, TX 77204, USA
| | - Ashkan Mahmoudi
- Department of Mechanical Engineering, University of Houston, 4726 Calhoun Road, Houston, TX 77204, USA
| | - Hadi Ghasemi
- Department of Mechanical Engineering, University of Houston, 4726 Calhoun Road, Houston, TX 77204, USA
- Corresponding author
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7
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Khan SH, Misra AK, Majumder CB, Arora A. Hydrate Dissociation Using Microwaves, Radio Frequency, Ultrasonic Radiation, and Plasma Techniques. CHEMBIOENG REVIEWS 2020. [DOI: 10.1002/cben.202000004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Shadman H. Khan
- Indian Institute of Technology Department of Chemical Engineering 247667 Roorkee India
| | - Ashwani K. Misra
- Gas Hydrate Research & Technology Center 410106 Panvel, Mumbai India
| | | | - Amit Arora
- Shaheed Bhagat Singh State Technical Campus Department of Chemical Engineering 152004 Ferozepur Punjab India
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8
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Doubra P, Naidoo P, Nelson WM, Ramjugernath D. Gas hydrate concentration measurements on sucrose solutions using a new pilot test rig. AIChE J 2020. [DOI: 10.1002/aic.16281] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Parisa Doubra
- Thermodynamics Research Unit, School of EngineeringUniversity of KwaZulu‐Natal, Howard College Campus Durban South Africa
| | - Paramespri Naidoo
- Thermodynamics Research Unit, School of EngineeringUniversity of KwaZulu‐Natal, Howard College Campus Durban South Africa
| | - Wayne Michael Nelson
- Thermodynamics Research Unit, School of EngineeringUniversity of KwaZulu‐Natal, Howard College Campus Durban South Africa
| | - Deresh Ramjugernath
- Thermodynamics Research Unit, School of EngineeringUniversity of KwaZulu‐Natal, Howard College Campus Durban South Africa
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Hassanpouryouzband A, Joonaki E, Vasheghani Farahani M, Takeya S, Ruppel C, Yang J, English NJ, Schicks JM, Edlmann K, Mehrabian H, Aman ZM, Tohidi B. Gas hydrates in sustainable chemistry. Chem Soc Rev 2020; 49:5225-5309. [DOI: 10.1039/c8cs00989a] [Citation(s) in RCA: 247] [Impact Index Per Article: 61.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
This review includes the current state of the art understanding and advances in technical developments about various fields of gas hydrates, which are combined with expert perspectives and analyses.
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Affiliation(s)
- Aliakbar Hassanpouryouzband
- Hydrates, Flow Assurance & Phase Equilibria Research Group
- Institute of GeoEnergy Engineering
- School of Energy
- Geoscience, Infrastructure and Society
- Heriot-Watt University
| | - Edris Joonaki
- Hydrates, Flow Assurance & Phase Equilibria Research Group
- Institute of GeoEnergy Engineering
- School of Energy
- Geoscience, Infrastructure and Society
- Heriot-Watt University
| | - Mehrdad Vasheghani Farahani
- Hydrates, Flow Assurance & Phase Equilibria Research Group
- Institute of GeoEnergy Engineering
- School of Energy
- Geoscience, Infrastructure and Society
- Heriot-Watt University
| | - Satoshi Takeya
- National Institute of Advanced Industrial Science and Technology (AIST)
- Tsukuba 305-8565
- Japan
| | | | - Jinhai Yang
- Hydrates, Flow Assurance & Phase Equilibria Research Group
- Institute of GeoEnergy Engineering
- School of Energy
- Geoscience, Infrastructure and Society
- Heriot-Watt University
| | - Niall J. English
- School of Chemical and Bioprocess Engineering
- University College Dublin
- Dublin 4
- Ireland
| | | | - Katriona Edlmann
- School of Geosciences
- University of Edinburgh
- Grant Institute
- Edinburgh
- UK
| | - Hadi Mehrabian
- Department of Chemical Engineering
- Massachusetts Institute of Technology
- Cambridge
- USA
| | - Zachary M. Aman
- Fluid Science & Resources
- School of Engineering
- University of Western Australia
- Perth
- Australia
| | - Bahman Tohidi
- Hydrates, Flow Assurance & Phase Equilibria Research Group
- Institute of GeoEnergy Engineering
- School of Energy
- Geoscience, Infrastructure and Society
- Heriot-Watt University
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10
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Chuah CY, Kim K, Lee J, Koh DY, Bae TH. CO2 Absorption Using Membrane Contactors: Recent Progress and Future Perspective. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.9b05439] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Chong Yang Chuah
- Singapore Membrane Technology Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University, Singapore 637141, Singapore
| | - Kyunam Kim
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology, Daejeon 34141, Republic of Korea
| | - Junghyun Lee
- School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore 637459, Singapore
| | - Dong-Yeun Koh
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology, Daejeon 34141, Republic of Korea
| | - Tae-Hyun Bae
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology, Daejeon 34141, Republic of Korea
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11
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Ko G, Seo Y. SF 6 Hydrate Formation in Various Reaction Media: A Preliminary Study on Hydrate-Based Greenhouse Gas Separation. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2019; 53:12945-12952. [PMID: 31595749 DOI: 10.1021/acs.est.9b04902] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
SF6 hydrate formation behaviors in various reaction media, such as bulk water, porous silica gel, and hollow silica, were investigated for hydrate-based SF6 separation with a primary focus on thermodynamic stability and formation kinetics. The measured three-phase (H-LW-V) equilibria demonstrated that the types of reaction media used in this study had no effect on the thermodynamic stability of SF6 hydrates. The dissociation enthalpy (ΔHd) of SF6 hydrate was measured using a high-pressure micro-differential scanning calorimeter, and it corresponded well with estimates from the Clausius-Clapeyron equation. The unstirred porous silica gel system showed a larger gas uptake and a higher growth rate at the early stage of SF6 hydrate formation. However, the gas uptake and growth rate of SF6 hydrates in stirred bulk water and unstirred hollow silica were significantly increased at a larger temperature driving force or in the presence of sodium dodecyl sulfate. The experimental results obtained in this study will be very helpful for a better understanding of the thermodynamic and kinetic characteristics of SF6 hydrate formed in various reaction media and in surfactant-added solution, and are expected to contribute to further development of the hydrate-based SF6 separation process.
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Affiliation(s)
- Gyeol Ko
- School of Urban and Environmental Engineering , Ulsan National Institute of Science and Technology , Ulsan 44919 , Republic of Korea
| | - Yongwon Seo
- School of Urban and Environmental Engineering , Ulsan National Institute of Science and Technology , Ulsan 44919 , Republic of Korea
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12
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An SF6 purification process utilizing gas hydrate formation developed for electric power industry. Sep Purif Technol 2019. [DOI: 10.1016/j.seppur.2019.02.027] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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13
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Dai Y, Li Q, Ruan X, Hou Y, Jiang X, Yan X, He G, Meng F, Wang Z. Fabrication of defect-free Matrimid® asymmetric membranes and the elevated temperature application for N2/SF6 separation. J Memb Sci 2019. [DOI: 10.1016/j.memsci.2019.01.050] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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14
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Lee H, Lee JD, Kim Y. Effect of Nonionic Surfactants on F-Gases (HFC-134a and SF6) Hydrate Formation. Ind Eng Chem Res 2018. [DOI: 10.1021/acs.iecr.8b02651] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Hyunju Lee
- Department of Mechanical Engineering, Worcester Polytechnic Institute, Worcester, Massachusetts 01609, United States
| | - Ju Dong Lee
- Offshore Plant Resources R&D Center, Korea Institute of Industrial Technology, Busan 618-230, Korea
| | - Yangdo Kim
- Department of Materials Science and Engineering, Pusan National University, Busan 609-735, Korea
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15
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16
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Chuah CY, Yu S, Na K, Bae TH. Enhanced SF6 recovery by hierarchically structured MFI zeolite. J IND ENG CHEM 2018. [DOI: 10.1016/j.jiec.2017.12.045] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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17
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Tajima H, Hattori M, Akagami H, Komatsu H, Yamagiwa K. Effects of hydrate-slurry decomposition conditions on gas generation and recovery performance. Chem Eng Res Des 2018. [DOI: 10.1016/j.cherd.2018.04.030] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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18
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Qin Y, Du QS, Xie NZ, Li JX, Huang RB. Exploring the possibility to store the mixed oxygen-hydrogen cluster in clathrate hydrate in molar ratio 1:2 (O 2+2H 2). J Mol Graph Model 2017; 73:1-7. [PMID: 28182995 DOI: 10.1016/j.jmgm.2017.01.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2016] [Revised: 12/18/2016] [Accepted: 01/03/2017] [Indexed: 11/24/2022]
Abstract
An interesting possibility is explored: storing the mixture of oxygen and hydrogen in clathrate hydrate in molar ratio 1:2. The interaction energies between oxygen, hydrogen, and clathrate hydrate are calculated using high level quantum chemical methods. The useful conclusion points from this study are summarized as follows. (1) The interaction energies of oxygen-hydrogen mixed cluster are larger than the energies of pure hydrogen molecular cluster. (2) The affinity of oxygen molecules with water molecules is larger than that of the hydrogen molecules with water molecules. (3) The dimension of O2-2H2 interaction structure is smaller than the dimension of CO2-2H2 interaction structure. (4) The escaping energy of oxygen molecules from the hydrate cell is larger than that of the hydrogen molecules. (5) The high affinity of the oxygen molecules with both the water molecules and the hydrogen molecules may promote the stability of oxygen-hydrogen mixture in the clathrate hydrate. Therefore it is possible to store the mixed (O2+2H2) cluster in clathrate hydrate.
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Affiliation(s)
- Yan Qin
- National Engineering Research Center for Non-Food Biorefinery, State Key Laboratory of Bioenergy Enzyme Technology, Guangxi Academy of Sciences, Nanning, Guangxi 530007, China
| | - Qi-Shi Du
- National Engineering Research Center for Non-Food Biorefinery, State Key Laboratory of Bioenergy Enzyme Technology, Guangxi Academy of Sciences, Nanning, Guangxi 530007, China; Gordon Life Science Institute, 53 South Cottage Road, Belmont, MA 02478, USA.
| | - Neng-Zhong Xie
- National Engineering Research Center for Non-Food Biorefinery, State Key Laboratory of Bioenergy Enzyme Technology, Guangxi Academy of Sciences, Nanning, Guangxi 530007, China
| | - Jian-Xiu Li
- National Engineering Research Center for Non-Food Biorefinery, State Key Laboratory of Bioenergy Enzyme Technology, Guangxi Academy of Sciences, Nanning, Guangxi 530007, China
| | - Ri-Bo Huang
- National Engineering Research Center for Non-Food Biorefinery, State Key Laboratory of Bioenergy Enzyme Technology, Guangxi Academy of Sciences, Nanning, Guangxi 530007, China
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19
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Zhao W, Francisco JS, Zeng XC. CO Separation from H 2 via Hydrate Formation in Single-Walled Carbon Nanotubes. J Phys Chem Lett 2016; 7:4911-4915. [PMID: 27934039 DOI: 10.1021/acs.jpclett.6b02443] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Hydrogen is an alternative fuel without generating greenhouse gas or other harmful emissions. Industrial hydrogen production, however, always contains a small fraction of carbon monoxide (CO) (∼0.5-2%) that must be removed for use in fuel cells. Here, we present molecular dynamics simulation evidence on facile separation of CO from H2 at ambient pressure via the formation of quasi-one-dimensional (Q1D) clathrate hydrates within single-walled carbon nanotubes (SW-CNTs). At ambient pressure, Q1D CO (or H2) clathrates in SW-CNTs are formed spontaneously when the SW-CNTs are immersed in CO (or H2) aqueous solution. More interestingly, for the CO/H2 aqueous solution, highly preferential adsorption of CO over H2 occurs within the octagonal or nonagonal ice nanotubes inside of SW-CNTs. These results suggest that the formation of Q1D hydrates within SW-CNTs can be a viable and safe method for the separation of CO from H2, which can be exploited for hydrogen purification in fuel cells.
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Affiliation(s)
- Wenhui Zhao
- Department of Physics, Ningbo University , Ningbo, Zhejiang 315211, China
- Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemical Physics, University of Science and Technology of China , Hefei, Anhui 230026, China
| | - Joseph S Francisco
- Department of Chemistry, University of Nebraska-Lincoln , Lincoln, Nebraska 68588, United States
| | - Xiao Cheng Zeng
- Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemical Physics, University of Science and Technology of China , Hefei, Anhui 230026, China
- Department of Chemistry, University of Nebraska-Lincoln , Lincoln, Nebraska 68588, United States
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20
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Skarmoutsos I, Tamiolakis G, Froudakis GE. Highly selective separation and adsorption-induced phase transition of SF 6 -N 2 fluid mixtures in three-dimensional carbon nanotube networks. J Supercrit Fluids 2016. [DOI: 10.1016/j.supflu.2016.03.024] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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21
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Highly selective polymer electrolyte membranes consisting of poly(2-ethyl-2-oxazoline) and Cu(NO3)2 for SF6 separation. Sci Rep 2016; 6:20430. [PMID: 26861503 PMCID: PMC4748214 DOI: 10.1038/srep20430] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2015] [Accepted: 01/04/2016] [Indexed: 01/31/2023] Open
Abstract
Polymer electrolyte membranes consisting of Cu(NO3)2 and poly(2-ethyl-2-oxazoline) (POZ) were prepared for SF6/N2 separation. It was anticipated that repulsive forces would be operative between the negative charge of water and the F atoms of SF6 when Cu(NO3)2 in the composite was solvated by water, and that the barrier effect of Cu2+ ions would be activated. In fact, Cu(NO3)2 solvated by water in the POZ membrane was observed to have more higher-order ionic aggregates than free ions or ion pairs, as confirmed by FT-Raman spectroscopy. Thus, when Cu(NO3)2 solvated by water was incorporated into the POZ matrix, the N2/SF6 selectivity increased to 28.0 with a N2 permeance of 11.2 GPU at a POZ/Cu(NO3)2 mole ratio of 1:0.7. The coordinative interaction of Cu(NO3)2 with the carbonyl group in POZ was confirmed by FT-IR spectroscopy and TGA, and the film thickness of the membrane was determined from SEM analysis.
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22
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Accurate measurement of phase equilibria and dissociation enthalpies of HFC-134a hydrates in the presence of NaCl for potential application in desalination. KOREAN J CHEM ENG 2016. [DOI: 10.1007/s11814-015-0268-7] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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23
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Wide Carbon Nanopores as Efficient Sites for the Separation of SF6 from N2. Sci Rep 2015; 5:11994. [PMID: 26149217 PMCID: PMC4493711 DOI: 10.1038/srep11994] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2014] [Accepted: 06/15/2015] [Indexed: 12/28/2022] Open
Abstract
SF6 and SF6-N2 mixed gases are used widely as insulators, but such gases have high greenhouse gas potential. The separation of SF6 from SF6-N2 mixed gases is an inevitable result of their use. Single-walled carbon nanohorns (CNHs) were used here for a fundamental study of the separation of SF6 and N2. The diameters of the interstitial and internal nanopores of the CNHs were 0.7 and 2.9 nm, respectively. The high selectivity of SF6 over N2 was observed only in the low-pressure regime in the interstitial 0.7 nm nanopores; the selectively was significantly decreased at higher pressures. In contrast, the high selectivity was maintained over the entire pressure range in the internal 2.9-nm nanopores. These results showed that the wide carbon nanopores were efficient for the separation of SF6 from the mixed gas.
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25
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Matito-Martos I, Álvarez-Ossorio J, Gutiérrez-Sevillano JJ, Doblaré M, Martin-Calvo A, Calero S. Zeolites for the selective adsorption of sulfur hexafluoride. Phys Chem Chem Phys 2015; 17:18121-30. [DOI: 10.1039/c5cp02407b] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Molecular simulations have been used to investigate at the molecular level the suitability of zeolites with different topology on the adsorption, diffusion and separation of a nitrogen–sulfur hexafluoride mixture containing the latter at low concentration.
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Affiliation(s)
- I. Matito-Martos
- Department of Physical
- Chemical and Natural Systems
- University Pablo de Olavide
- Sevilla 41013
- Spain
| | - J. Álvarez-Ossorio
- Department of Physical
- Chemical and Natural Systems
- University Pablo de Olavide
- Sevilla 41013
- Spain
| | | | - M. Doblaré
- Abengoa Research
- Abengoa
- Campus Palmas Altas
- 41014 Seville
- Spain
| | - A. Martin-Calvo
- Department of Physical
- Chemical and Natural Systems
- University Pablo de Olavide
- Sevilla 41013
- Spain
| | - S. Calero
- Department of Physical
- Chemical and Natural Systems
- University Pablo de Olavide
- Sevilla 41013
- Spain
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26
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Tajima H, Oota Y, Yamagiwa K. Improving the gas recovery and separation efficiency of a hydrate-based gas separation. Chem Eng Res Des 2014. [DOI: 10.1016/j.cherd.2014.02.008] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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27
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Cai L, Pethica BA, Debenedetti PG, Sundaresan S. Formation kinetics of cyclopentane–methane binary clathrate hydrate. Chem Eng Sci 2014. [DOI: 10.1016/j.ces.2014.08.025] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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28
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Park SS, Lee S, Won YS, Ahn YJ. Comparative investigation of polyhedral water cages of (H2O)n (n=20, 24, and 28) encaging CH4 and SF6 as guest molecules. Chem Phys 2014. [DOI: 10.1016/j.chemphys.2014.07.017] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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29
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Kim D, Kim DW, Lim HK, Jeon J, Kim H, Jung HT, Lee H. Inhibited phase behavior of gas hydrates in graphene oxide: influences of surface and geometric constraints. Phys Chem Chem Phys 2014; 16:22717-22. [DOI: 10.1039/c4cp03263b] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Structural changes of water confined in graphene oxide to gas hydrates were investigated using low temperature XRD. It was revealed that the phase equilibrium points of gas hydrates strongly inhibited due to the surrounding nano-sized voids and the hydrophilic surface of graphene oxide.
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Affiliation(s)
- Daeok Kim
- Graduate School of EEWS
- Korea Advanced Institute of Science and Technology
- Daejeon 305-701, South Korea
| | - Dae Woo Kim
- Department of Chemical and Biomolecular Engineering
- Korea Advanced Institute of Science and Technology
- Daejeon 305-701, South Korea
| | - Hyung-Kyu Lim
- Graduate School of EEWS
- Korea Advanced Institute of Science and Technology
- Daejeon 305-701, South Korea
| | - Jiwon Jeon
- Graduate School of EEWS
- Korea Advanced Institute of Science and Technology
- Daejeon 305-701, South Korea
| | - Hyungjun Kim
- Graduate School of EEWS
- Korea Advanced Institute of Science and Technology
- Daejeon 305-701, South Korea
| | - Hee-Tae Jung
- Department of Chemical and Biomolecular Engineering
- Korea Advanced Institute of Science and Technology
- Daejeon 305-701, South Korea
| | - Huen Lee
- Graduate School of EEWS
- Korea Advanced Institute of Science and Technology
- Daejeon 305-701, South Korea
- Department of Chemical and Biomolecular Engineering
- Korea Advanced Institute of Science and Technology
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30
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Zhang J, Zhou JZ, Xu ZP, Li Y, Cao T, Zhao J, Ruan X, Liu Q, Qian G. Decomposition of potent greenhouse gas sulfur hexafluoride (SF6) by Kirschsteinite-dominant stainless steel slag. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2013; 48:599-606. [PMID: 24328286 DOI: 10.1021/es403884e] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
In this investigation, kirschsteinite-dominant stainless steel slag (SSS) has been found to decompose sulfur hexafluoride (SF6) with the activity higher than pure metal oxides, such as Fe2O3 and CaO. SSS is mainly made up of CaO·FeO·SiO2(CFS)/MgO·FeO·MnO(RO) phase conglomeration. The SF6 decomposition reaction with SSS at 500-700 °C generated solid MF2/MF3 and gaseous SiF4, SO2/SO3 as well as HF. When 10 wt % of SSS was replaced by Fe2O3 or CaO, the SF6 decomposition amount decreased from 21.0 to 15.2 or 15.0 mg/g at 600 °C. The advantage of SSS over Fe2O3 or CaO in the SF6 decomposition is related to its own special microstructure and composition. The dispersion of each oxide component in SSS reduces the sintering of freshly formed MF2/MF3, which is severe in the case of pure metal oxides and inhibits the continuous reaction of inner components. Moreover, SiO2 in SSS reacts with SF6 and evolves as gaseous SiF4, which leaves SSS with voids and consequently exposes inner oxides for further reactions. In addition, we have found that oxygen significantly inhibited the SF6 decomposition with SSS while H2O did not, which could be explained in terms of reaction pathways. This research thus demonstrates that waste material SSS could be potentially an effective removal reagent of greenhouse gas SF6.
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Affiliation(s)
- Jia Zhang
- School of Environmental and Chemical Engineering, Shanghai University , No. 333 Nanchen Rd., Shanghai 200444, P. R. China
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Lee S, Lee Y, Lee J, Lee H, Seo Y. Experimental verification of methane-carbon dioxide replacement in natural gas hydrates using a differential scanning calorimeter. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2013; 47:13184-13190. [PMID: 24175633 DOI: 10.1021/es403542z] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The methane (CH4) - carbon dioxide (CO2) swapping phenomenon in naturally occurring gas hydrates is regarded as an attractive method of CO2 sequestration and CH4 recovery. In this study, a high pressure microdifferential scanning calorimeter (HP μ-DSC) was used to monitor and quantify the CH4 - CO2 replacement in the gas hydrate structure. The HP μ-DSC provided reliable measurements of the hydrate dissociation equilibrium and hydrate heat of dissociation for the pure and mixed gas hydrates. The hydrate dissociation equilibrium data obtained from the endothermic thermograms of the replaced gas hydrates indicate that at least 60% of CH4 is recoverable after reaction with CO2, which is consistent with the result obtained via direct dissociation of the replaced gas hydrates. The heat of dissociation values of the CH4 + CO2 hydrates were between that of the pure CH4 hydrate and that of the pure CO2 hydrate, and the values increased as the CO2 compositions in the hydrate phase increased. By monitoring the heat flows from the HP μ-DSC, it was found that the noticeable dissociation or formation of a gas hydrate was not detected during the CH4 - CO2 replacement process, which indicates that a substantial portion of CH4 hydrate does not dissociate into liquid water or ice and then forms the CH4 + CO2 hydrate. This study provides the first experimental evidence using a DSC to reveal that the conversion of the CH4 hydrate to the CH4 + CO2 hydrate occurs without significant hydrate dissociation.
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Affiliation(s)
- Seungmin Lee
- Offshore Plant Resources R&D Center, Korea Institute of Industrial Technology , Busan 618-230, Republic of Korea
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32
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Separation of ethylene from refinery dry gas via forming hydrate in w/o dispersion system. Sep Purif Technol 2013. [DOI: 10.1016/j.seppur.2013.06.008] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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33
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Park S, Lee S, Lee Y, Seo Y. CO2 capture from simulated fuel gas mixtures using semiclathrate hydrates formed by quaternary ammonium salts. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2013; 47:7571-7577. [PMID: 23718261 DOI: 10.1021/es400966x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
In order to investigate the feasibility of semiclathrate hydrate-based precombustion CO2 capture, thermodynamic, kinetic, and spectroscopic studies were undertaken on the semiclathrate hydrates formed from a fuel gas mixture of H2 (60%) + CO2 (40%) in the presence of quaternary ammonium salts (QASs) such as tetra-n-butylammonium bromide (TBAB) and fluoride (TBAF). The inclusion of QASs demonstrated significantly stabilized hydrate dissociation conditions. This effect was greater for TBAF than TBAB. However, due to the presence of dodecahedral cages that are partially filled with water molecules, TBAF showed a relatively lower gas uptake than TBAB. From the stability condition measurements and compositional analyses, it was found that with only one step of semiclathrate hydrate formation with the fuel gas mixture from the IGCC plants, 95% CO2 can be enriched in the semiclathrate hydrate phase at room temperature. The enclathration of both CO2 and H2 in the cages of the QAS semiclathrate hydrates and the structural transition that results from the inclusion of QASs were confirmed through Raman and (1)H NMR measurements. The experimental results obtained in this study provide the physicochemical background required for understanding selective partitioning and distributions of guest gases in the QAS semiclathrate hydrates and for investigating the feasibility of a semiclathrate hydrate-based precombustion CO2 capture process.
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Affiliation(s)
- Sungwon Park
- School of Urban and Environmental Engineering, Ulsan National Institute of Science and Technology, Ulsan 689-798, Republic of Korea
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34
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Zhang J, Zhou JZ, Liu Q, Qian G, Xu ZP. Efficient removal of sulfur hexafluoride (SF6) through reacting with recycled electroplating sludge. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2013; 47:6493-6499. [PMID: 23705981 DOI: 10.1021/es400553e] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
This paper reports that recycled electroplating sludge is able to efficiently remove greenhouse gas sulfur hexafluoride (SF6). The removal process involves various reactions of SF6 with the recycled sludge. Remarkably, the sludge completely removed SF6 at a capacity of 1.10 mmol/g (SF6/sludge) at 600 °C. More importantly, the evolved gases were SO2, SiF4, and a limited amount of HF, with no toxic SOF4, SO2F2, or SF4 being detected. These generated gases can be readily captured and removed by NaOH solution. The reacted solids were further found to be various metal fluorides, thus revealing that SF6 removal takes place by reacting with various metal oxides and silicate in the sludge. Moreover, the kinetic investigation revealed that the SF6 reaction with the sludge is a first-order chemically controlled process. This research thus demonstrates that the waste electroplating sludge can be potentially used as an effective removal agent for one of the notorious greenhouse gases, SF6.
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Affiliation(s)
- Jia Zhang
- School of Environmental and Chemical Engineering, Shanghai University, Number 333 Nanchen Road, Shanghai 200444, PR China
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35
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Liu H, Mu L, Liu B, Zhang X, Wang J, Wang B, Sun C, Yang L, Wang H, Xiao P, Chen G. Experimental Studies of the Separation of C2 Compounds from CH4 + C2H4 + C2H6 + N2 Gas Mixtures by an Absorption–Hydration Hybrid Method. Ind Eng Chem Res 2013. [DOI: 10.1021/ie3028526] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Huang Liu
- State Key
Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, P.R.
China
| | - Liang Mu
- State Key
Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, P.R.
China
| | - Bei Liu
- State Key
Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, P.R.
China
| | - Xiaoxin Zhang
- State Key
Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, P.R.
China
| | - Jin Wang
- State Key
Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, P.R.
China
| | - Bo Wang
- State Key
Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, P.R.
China
| | - Changyu Sun
- State Key
Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, P.R.
China
| | - Lanying Yang
- State Key
Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, P.R.
China
| | - Hao Wang
- State Key
Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, P.R.
China
| | - Peng Xiao
- State Key
Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, P.R.
China
| | - Guangjin Chen
- State Key
Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, P.R.
China
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36
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Sarupria S, Debenedetti PG. Homogeneous Nucleation of Methane Hydrate in Microsecond Molecular Dynamics Simulations. J Phys Chem Lett 2012; 3:2942-7. [PMID: 26292230 DOI: 10.1021/jz3012113] [Citation(s) in RCA: 99] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
We report atomistically detailed molecular dynamics simulations of homogeneous nucleation of methane hydrate in bulk aqueous phase in the absence of any interface. Subcritical clusters of water and methane molecules are formed in the initial segment of the simulations, which then aggregate to give the critical hydrate nucleus. This occurs over time scales of several hundred nanoseconds, indicating that the formation and aggregation of subcritical clusters can contribute significantly to the overall rate of hydrate nucleation. The clusters have elements of sI hydrate structure, such as 5(12) and 5(12)6(2) cages as well as other uncommon 5(12)6(3) and 5(12)6(4) cages, but do not possess long-range order. Clusters are dynamic in nature and undergo continuous structural rearrangements.
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Affiliation(s)
- Sapna Sarupria
- †Department of Chemical and Biomolecular Engineering, Clemson University, Clemson, South Carolina 29634, United States
- ‡Department of Chemical and Biological Engineering, Princeton University, Princeton, New Jersey 08544, United States
| | - Pablo G Debenedetti
- ‡Department of Chemical and Biological Engineering, Princeton University, Princeton, New Jersey 08544, United States
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37
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Lee S, Lee Y, Park S, Kim Y, Lee JD, Seo Y. Thermodynamic and Spectroscopic Identification of Guest Gas Enclathration in the Double Tetra-n-butylammonium Fluoride Semiclathrates. J Phys Chem B 2012; 116:9075-81. [PMID: 22775988 DOI: 10.1021/jp302647c] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Seungmin Lee
- Green Technology Center, Korea Institute of Industrial Technology, Ulsan 681-802,
Republic of Korea
| | - Youngjun Lee
- School
of Urban and Environmental
Engineering, Ulsan National Institute of Science and Technology, Ulsan 689-798, Republic of Korea
| | - Sungwon Park
- School
of Urban and Environmental
Engineering, Ulsan National Institute of Science and Technology, Ulsan 689-798, Republic of Korea
| | - Yunju Kim
- School
of Urban and Environmental
Engineering, Ulsan National Institute of Science and Technology, Ulsan 689-798, Republic of Korea
| | - Ju Dong Lee
- Green Technology Center, Korea Institute of Industrial Technology, Ulsan 681-802,
Republic of Korea
| | - Yongwon Seo
- School
of Urban and Environmental
Engineering, Ulsan National Institute of Science and Technology, Ulsan 689-798, Republic of Korea
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38
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Lee HH, Ahn SH, Nam BU, Kim BS, Lee GW, Moon D, Shin HJ, Han KW, Yoon JH. Thermodynamic stability, spectroscopic identification, and gas storage capacity of CO2-CH4-N2 mixture gas hydrates: implications for landfill gas hydrates. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2012; 46:4184-4190. [PMID: 22380606 DOI: 10.1021/es203389k] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Landfill gas (LFG), which is primarily composed of CH(4), CO(2), and N(2), is produced from the anaerobic digestion of organic materials. To investigate the feasibility of the storage and transportation of LFG via the formation of hydrate, we observed the phase equilibrium behavior of CO(2)-CH(4)-N(2) mixture hydrates. When the specific molar ratio of CO(2)/CH(4) was 40/55, the equilibrium dissociation pressures were gradually shifted to higher pressures and lower temperatures as the mole fraction of N(2) increased. X-ray diffraction revealed that the CO(2)-CH(4)-N(2) mixture hydrate prepared from the CO(2)/CH(4)/N(2) (40/55/5) gas mixture formed a structure I clathrate hydrate. A combination of Raman and solid-state (13)C NMR measurements provided detailed information regarding the cage occupancy of gas molecules trapped in the hydrate frameworks. The gas storage capacity of LFG hydrates was estimated from the experimental results for the hydrate formations under two-phase equilibrium conditions. We also confirmed that trace amounts of nonmethane organic compounds do not affect the cage occupancy of gas molecules or the thermodynamic stability of LFG hydrates.
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Affiliation(s)
- Hyeong-Hoon Lee
- Department of Energy and Resources Engineering, Korea Maritime University, Busan, Korea
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39
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Lee S, Park S, Lee Y, Lee J, Lee H, Seo Y. Guest gas enclathration in semiclathrates of tetra-n-butylammonium bromide: stability condition and spectroscopic analysis. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:10597-10603. [PMID: 21749094 DOI: 10.1021/la202143t] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
In this study, guest gas enclathration behavior in semiclathrates of tetra-n-butylammonium bromide (TBAB) was closely investigated through phase equilibrium measurement and spectroscopic analysis. The three-phase equilibria of semiclathrate (H), liquid water (L(W)), and vapor (V) for the ternary CH(4) + TBAB + water and CO(2) + TBAB + water mixtures with various TBAB concentrations were experimentally measured to determine the stability conditions of the double TBAB semiclathrates. Equilibrium dissociation temperatures for pure TBAB semiclathrate were also measured at the same concentrations under atmospheric conditions. The dissociation temperature and dissociation enthalpy of pure TBAB semiclathrate were confirmed by differential scanning calorimetry. The experimental results showed that the double CH(4) (or CO(2)) + TBAB semiclathrates yielded greatly enhanced thermal stability when compared with pure CH(4) (or CO(2)) hydrate. The highest stabilization effect was observed at the stoichiometric concentration of pure TBAB semiclathrate, which is 3.7 mol%. From the NMR and Raman spectroscopic studies, it was found that the guest gases (CH(4) and CO(2)) were enclathrated in the double semiclathrates. In particular, from the cage-dependent (13)C NMR chemical shift, it was confirmed that CH(4) molecules were captured in the 5(12) cages of the double semiclathrates.
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Affiliation(s)
- Seungmin Lee
- Department of Chemical Engineering, Changwon National University, Gyeongnam 641-773, Republic of Korea
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40
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Lee SM, Park SM, Lee YJ, Lee SW, Seo YW. Phase Equilibria and 13C NMR Analysis of the Double Semi-Clathrates Containing TBAB. KOREAN CHEMICAL ENGINEERING RESEARCH 2011. [DOI: 10.9713/kcer.2011.49.3.367] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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41
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Sarupria S, Debenedetti PG. Molecular Dynamics Study of Carbon Dioxide Hydrate Dissociation. J Phys Chem A 2011; 115:6102-11. [DOI: 10.1021/jp110868t] [Citation(s) in RCA: 90] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Sapna Sarupria
- Department of Chemical and Biological Engineering, Princeton University, Princeton, New Jersey 08544, United States
| | - Pablo G. Debenedetti
- Department of Chemical and Biological Engineering, Princeton University, Princeton, New Jersey 08544, United States
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