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Horchani R, Sulaiman N, Shafii SA. Eigenvalues and thermal properties of the A 1Σ u+ state of sodium dimers. Mol Phys 2022. [DOI: 10.1080/00268976.2022.2046194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Ridha Horchani
- Department of Physics, College of Science, Sultan Qaboos University, Muscat, Sultanate of Oman
| | - Nidhal Sulaiman
- Department of Physics, College of Science, Sultan Qaboos University, Muscat, Sultanate of Oman
| | - Safa Al Shafii
- Department of Physics, College of Science, Sultan Qaboos University, Muscat, Sultanate of Oman
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Zhao F, Zhu L, Wang Z, Hou Y, Chen J, Wang C, Xu D. Experimental and Numerical Investigation into the Heat- and Mass-Transfer Processes of n-Butane Adsorption on Activated Carbon. ACS OMEGA 2021; 6:17162-17172. [PMID: 34278103 PMCID: PMC8280664 DOI: 10.1021/acsomega.0c06273] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/25/2020] [Accepted: 05/28/2021] [Indexed: 06/13/2023]
Abstract
In this work, the adsorption parameters of n-butane vapor on an absorbent were tested following the fixed-bed method. According to the corresponding experiments, the maximum adsorption capacity and breakthrough time of activated carbon (AC) are 0.2674 g·g-1 and 924 min, respectively. According to the two-energy-state model formula and the classical adsorption heat formula, the values of theoretical and actual adsorption heat of AC adsorbing n-butane are 5.48 and 5.56 kJ·mol-1, respectively. The model for adsorption of n-butane by an AC fixed bed is based on the analytical solutions to the mass, momentum, and energy conservation equations. The model is built using porous media zone in ANSYS Fluent, the implementation of the model into ANSYS Fluent under user-defined functions (UDFs) is also described, the mass source term Si and energy source term S T are loaded into Fluent through UDF, and then the mass- and heat-transfer processes of AC in the absorption of n-butane are simulated. Furthermore, the predictions by ANSYS Fluent are compared with in situ experimental data, and the deviation rate of breakthrough time and temperature of six monitoring points is less than 5%. The results verify the accuracy and feasibility of computational fluid dynamics (CFD). Therefore, the model can be used to predict the engineering application of the adsorption of organic gases by various porous media.
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Affiliation(s)
- Fei Zhao
- Department
of Environmental Engineering, Beijing Institute
of Petrochemical Technology, Beijing 102617, China
| | - Ling Zhu
- Department
of Environmental Engineering, Beijing Institute
of Petrochemical Technology, Beijing 102617, China
| | - Zhenzhong Wang
- SINOPEC
Research Institute of Safety Engineering, Qingdao, Shandong 266071, China
| | - Yan Hou
- Department
of Environmental Engineering, Beijing Institute
of Petrochemical Technology, Beijing 102617, China
| | - Jiaqing Chen
- Department
of Environmental Engineering, Beijing Institute
of Petrochemical Technology, Beijing 102617, China
| | - Chunyu Wang
- Department
of Environmental Engineering, Beijing Institute
of Petrochemical Technology, Beijing 102617, China
- College
of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China
| | - Danyun Xu
- Department
of Environmental Engineering, Beijing Institute
of Petrochemical Technology, Beijing 102617, China
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Li Y, Shi Q, Luo Y, Chu G, Zou H, Zhang L, Sun B. Hydrothermal controllable synthesis of hollow carbon particles: Reaction-growth mechanism. Chem Eng Sci 2020. [DOI: 10.1016/j.ces.2020.115787] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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Hwang J, Pini R. Supercritical CO 2 and CH 4 Uptake by Illite-Smectite Clay Minerals. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2019; 53:11588-11596. [PMID: 31478655 DOI: 10.1021/acs.est.9b03638] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Clay minerals abound in sedimentary formations and the interaction of reservoir gases with their submicron features have direct relevance to many geoenergy applications. The quantification of gas uptake over a broad range of pressures is key toward assessing the significance of these physical interactions on enhancing storage capacity and gas recovery. We report a systematic investigation of the sorption properties of three source clay minerals-Na-rich montmorillonite (SWy-2), illite-smectite mixed layer (ISCz-1), and illite (IMt-2)-using CO2 and CH4 up to 30 MPa at 25-115 °C. The textural characterization of the clays by gas physisorption indicates that micropores are only partly accessible to N2 (77 K) and Ar (87 K), while larger uptakes are measured with CO2 (273 K) in the presence of illite. The supercritical excess sorption experiments confirm these findings while revealing differences in uptake capacities that originate from the clay-specific pore size distribution. The lattice density functional theory model describes accurately the measured sorption isotherms by using a distribution of properly weighted slit pores and clay-specific solid-fluid interaction energies, which agree with isosteric heats of adsorption obtained experimentally. The model indicates that the maximum degree of pore occupancy is universal to the three clays and the two gases, and it depends solely on temperature, reaching values near unity at the critical temperature. These observations greatly support the model's predictive capability for estimating gas adsorption on clay-bearing rocks and sediments.
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Affiliation(s)
- Junyoung Hwang
- Department of Chemical Engineering , Imperial College London , SW7 2AZ London , U.K
| | - Ronny Pini
- Department of Chemical Engineering , Imperial College London , SW7 2AZ London , U.K
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Tang X, Ripepi N, Rigby S, Mokaya R, Gilliland E. New perspectives on supercritical methane adsorption in shales and associated thermodynamics. J IND ENG CHEM 2019. [DOI: 10.1016/j.jiec.2019.06.015] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Murialdo M, Weadock NJ, Liu Y, Ahn CC, Baker SE, Landskron K, Fultz B. High-Pressure Hydrogen Adsorption on a Porous Electron-Rich Covalent Organonitridic Framework. ACS OMEGA 2019; 4:444-448. [PMID: 31459342 PMCID: PMC6648737 DOI: 10.1021/acsomega.8b03206] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/16/2018] [Accepted: 12/18/2018] [Indexed: 06/10/2023]
Abstract
We report that a porous, electron-rich, covalent, organonitridic framework (PECONF-4) exhibits an unusually high hydrogen uptake at 77 K, relative to its specific surface area. Chahine's rule, a widely cited heuristic for hydrogen adsorption, sets a maximum adsorptive uptake of 1 wt % hydrogen at 77 K per 500 m2 of the adsorbent surface area. High-pressure hydrogen adsorption measurements in a Sieverts apparatus showed that PECONF-4 exceeds Chahine's rule by 50%. The Brunauer-Emmett-Teller (BET) specific surface area of PECONF-4 was measured redundantly with nitrogen, argon, and carbon dioxide and found to be between 569 ± 2 and 676 ± 13 m2 g-1. Furthermore, hydrogen on PECONF-4 has a high heat of adsorption, in excess of 9 kJ mol-1.
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Affiliation(s)
- Maxwell Murialdo
- Lawrence
Livermore National Laboratory, Livermore, California 94550, United States
| | - Nicholas J. Weadock
- Department
of Applied Physics and Materials Science, California Institute of Technology, Pasadena, California 91125, United States
| | - Yiqun Liu
- Department
of Chemistry, Lehigh University, Bethlehem, Pennsylvania 18015, United States
| | - Channing C. Ahn
- Department
of Applied Physics and Materials Science, California Institute of Technology, Pasadena, California 91125, United States
| | - Sarah E. Baker
- Lawrence
Livermore National Laboratory, Livermore, California 94550, United States
| | - Kai Landskron
- Department
of Chemistry, Lehigh University, Bethlehem, Pennsylvania 18015, United States
| | - Brent Fultz
- Department
of Applied Physics and Materials Science, California Institute of Technology, Pasadena, California 91125, United States
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Chen Y, Qiao Z, Huang J, Wu H, Xiao J, Xia Q, Xi H, Hu J, Zhou J, Li Z. Unusual Moisture-Enhanced CO 2 Capture within Microporous PCN-250 Frameworks. ACS APPLIED MATERIALS & INTERFACES 2018; 10:38638-38647. [PMID: 30360051 DOI: 10.1021/acsami.8b14400] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
Developing metal-organic frameworks (MOFs) with moisture-resistant feature or moisture-enhanced adsorption is challenging for the practical CO2 capture under humid conditions. In this work, under humid conditions, the CO2 adsorption behaviors of two iron-based MOF materials, PCN-250(Fe3) and PCN-250(Fe2Co), were investigated. An interesting phenomenon is observed that the two materials demonstrate an unusual moisture-enhanced adsorption of CO2. For PCN-250 frameworks, H2O molecule induces a remarkable increase in the CO2 uptake for the dynamic CO2 capture from CO2/N2 (15:85) mixture. For PCN-250(Fe3), its CO2 adsorption capacity increases by 54.2% under the 50% RH humid condition, compared with that under dry conditions (from 1.18 to 1.82 mmol/g). Similarly, the CO2 adsorption uptake of PCN-250(Fe2Co) increases from 1.32 to 2.23 mmol/g, exhibiting a 68.9% increase. Even up to 90% RH, for PCN-250(Fe3) and PCN-250(Fe2Co), obvious increases of 43.7 and 70.2% in the CO2 adsorption capacities are observed in comparison with those under dry conditions, respectively. Molecular simulations indicate that the hydroxo functional groups (μ3-O) within the framework play a crucial role in improving CO2 uptake in the presence of water vapor. Besides, partial substitution of Fe3+ by Co2+ ions in the PCN-250 framework gives rise to a great improvement in CO2 adsorption capacity and selectivity. The excellent moisture stability (stable even after exposure to 90% RH humid air for 30 days), superior recyclability, as well as moisture-enhanced feature make PCN-250 as an excellent MOF adsorbent for CO2 capture under humid conditions. This study provides a new paradigm that PCN-250 frameworks can not only be moisture resistant but can also subtly convert the common negative effect of moisture to a positive impact on improving CO2 capture performance.
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Affiliation(s)
- Yongwei Chen
- School of Chemistry and Chemical Engineering , South China University of Technology , Guangzhou 510640 , P. R. China
| | - Zhiwei Qiao
- School of Chemistry and Chemical Engineering , South China University of Technology , Guangzhou 510640 , P. R. China
- School of Chemistry and Chemical Engineering , Guangzhou University , Guangzhou 510006 , P. R. China
| | - Jiali Huang
- Key Laboratory for Advanced Materials, School of Chemistry and Molecular Engineering , East China University of Science and Technology , Shanghai 200237 , P. R. China
| | - Houxiao Wu
- School of Chemistry and Chemical Engineering , South China University of Technology , Guangzhou 510640 , P. R. China
| | - Jing Xiao
- School of Chemistry and Chemical Engineering , South China University of Technology , Guangzhou 510640 , P. R. China
| | - Qibin Xia
- School of Chemistry and Chemical Engineering , South China University of Technology , Guangzhou 510640 , P. R. China
| | - Hongxia Xi
- School of Chemistry and Chemical Engineering , South China University of Technology , Guangzhou 510640 , P. R. China
| | - Jun Hu
- Key Laboratory for Advanced Materials, School of Chemistry and Molecular Engineering , East China University of Science and Technology , Shanghai 200237 , P. R. China
| | - Jian Zhou
- School of Chemistry and Chemical Engineering , South China University of Technology , Guangzhou 510640 , P. R. China
| | - Zhong Li
- School of Chemistry and Chemical Engineering , South China University of Technology , Guangzhou 510640 , P. R. China
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