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Gong F, Hou D, Tang R, Lei Z, Zhong C. Microscopic Characterization of Deformation Behavior during Kerogen Evolution: Effects of Maturity and Skeleton Moisture Content. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:17601-17612. [PMID: 39116282 DOI: 10.1021/acs.langmuir.4c01916] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/10/2024]
Abstract
The CH4 storage and seepage capacity of shale kerogen are the main controlling factors of the natural gas production rate, and the porosity and permeability of kerogen are greatly affected by kerogen deformation. Therefore, the study of the deformation rule and CH4 adsorption characteristics of kerogen at different maturities and skeleton moisture contents has an important impact on the proper understanding of the development potential of shale gas reservoirs. In this paper, kerogen maturity (II-A, II-B, II-C, and II-D) and skeleton moisture content (0.0, 0.6, 1.2, 1.8, and 2.4 wt %) were considered. The deformation of kerogen, the adsorption of CH4 after deformation, and the quadratic deformation induced by CH4 were studied by using Grand Canonical Monte Carlo (GCMC) and molecular dynamics (MD). The results show that the kerogen volume strain increases with increasing skeleton moisture content, following the order II-A < II-B < II-C < II-D for the same moisture content. The density of the kerogen matrix decreases, and porosity increases with rising moisture content. The void fraction of immature kerogen decreases with increasing water content, while the opposite is true for postmature kerogen. The presence of skeleton moisture decreases the CH4 adsorption capacity of immature kerogen and increases the CH4 adsorption capacity of postmature kerogen. The chemical structure of immature kerogen is relatively soft, making its volume more affected by CH4 adsorption compared with postmature kerogen. In the same water environment, postmature kerogen has greater CH4 storage, diffusion, and seepage capacity compared to those of immature kerogen, suggesting that reservoirs with high organic matter maturity should be prioritized for development.
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Affiliation(s)
- Fengming Gong
- College of Energy (College of Modern Shale Gas Industry), Chengdu University of Technology, Chengdu, Sichuan 610059, China
| | - Dali Hou
- State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation (Chengdu University of Technology), Chengdu, Sichuan 610059, China
- College of Energy (College of Modern Shale Gas Industry), Chengdu University of Technology, Chengdu, Sichuan 610059, China
| | - Ruiqian Tang
- College of Energy (College of Modern Shale Gas Industry), Chengdu University of Technology, Chengdu, Sichuan 610059, China
| | - Zhiqiang Lei
- College of Energy (College of Modern Shale Gas Industry), Chengdu University of Technology, Chengdu, Sichuan 610059, China
| | - Chuanrong Zhong
- State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation (Chengdu University of Technology), Chengdu, Sichuan 610059, China
- College of Energy (College of Modern Shale Gas Industry), Chengdu University of Technology, Chengdu, Sichuan 610059, China
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Wang Z, Si S, Cui Y, Dai J, Yue J. Study on Adsorption Characteristics of Deep Coking Coal Based on Molecular Simulation and Experiments. ACS OMEGA 2023; 8:3129-3147. [PMID: 36713693 PMCID: PMC9878549 DOI: 10.1021/acsomega.2c06593] [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: 10/12/2022] [Accepted: 12/23/2022] [Indexed: 06/18/2023]
Abstract
To study the effect of high temperature and high pressure on the adsorption characteristics of coking coal, Liulin coking coal and Pingdingshan coking coal were selected as the research objects, and isotherm adsorption curves at different temperatures and pressures were obtained by combining isotherm adsorption experiments and molecular dynamics methods. The effect of high temperature and high pressure on the adsorption characteristics of coking coal was analyzed, and an isothermal adsorption model suitable for high-temperature and high-pressure conditions was studied. The results show that the adsorption characteristics of deep coking coal can be well characterized by the molecular dynamics method. Under a supercritical condition, the excess adsorption capacity of methane decreases with the increase of temperature. With the increase of pressure, the excess adsorption capacity rapidly increases in the early stage, temporarily stabilizes in the middle stage, and decreases in the later stage. Based on the classical adsorption model, the adsorption capacity of coking coal under high-temperature and high-pressure environments is fitted. The fitting degree ranges from good to poor. The order is D-R > D-A > L-F >BET > Langmuir, and combined with temperature gradient, pressure gradient, and the D-R adsorption model, it can be seen that after 800 m deep in Liulin Mine and 400 m deep in Pingdingshan Mine, the adsorption capacity of coking coal to methane decreases with the increase of depth.
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Affiliation(s)
- Zhaofeng Wang
- School
of Safety Science and Engineering, Henan
Polytechnic University, Jiaozuo, Henan454000, China
- MOE
Engineering Research Center of Mine Disaster Prevention and Emergency
Rescue, Jiaozuo, Henan454000, China
- State
Collaborative Innovation Center of Coal Work Safety and Clean-efficiency
Utilization, Henan Polytechnic University, Jiaozuo, Henan454000, China
| | - Shasha Si
- School
of Safety Science and Engineering, Henan
Polytechnic University, Jiaozuo, Henan454000, China
| | - Yongjie Cui
- National
Energy Shendong Coal Group Buertai Coal Mine, Ordos, Inner Mongolia017000, China
| | - Juhua Dai
- School
of Safety Science and Engineering, Henan
Polytechnic University, Jiaozuo, Henan454000, China
| | - Jiwei Yue
- School
of Safety Science and Engineering, Anhui
University of Science and Technology, Huainan, Anhui232001, China
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Sosa JE, Malheiro C, Castro PJ, Ribeiro RPPL, Piñeiro MM, Plantier F, Mota JPB, Araújo JMM, Pereiro AB. Exploring the Potential of Metal-Organic Frameworks for the Separation of Blends of Fluorinated Gases with High Global Warming Potential. GLOBAL CHALLENGES (HOBOKEN, NJ) 2023; 7:2200107. [PMID: 36618101 PMCID: PMC9818065 DOI: 10.1002/gch2.202200107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Revised: 09/15/2022] [Indexed: 06/17/2023]
Abstract
The research on porous materials for the selective capture of fluorinated gases (F-gases) is key to reduce their emissions. Here, the adsorption of difluoromethane (R-32), pentafluoroethane (R-125), and 1,1,1,2-tetrafluoroethane (R-134a) is studied in four metal-organic frameworks (MOFs: Cu-benzene-1,3,5-tricarboxylate, zeolitic imidazolate framework-8, MOF-177, and MIL-53(Al)) and in one zeolite (ZSM-5) with the aim to develop technologies for the efficient capture and separation of high global warming potential blends containing these gases. Single-component sorption equilibria of the pure gases are measured at three temperatures (283.15, 303.15, and 323.15 K) by gravimetry and correlated using the Tóth and Virial adsorption models, and selectivities toward R-410A and R-407F are determined by ideal adsorption solution theory. While at lower pressures, R-125 and R-134a are preferentially adsorbed in all materials, at higher pressures there is no selectivity, or it is shifted toward the adsorption R-32. Furthermore, at high pressures, MOF-177 shows the highest adsorption capacity for the three F-gases. The results presented here show that the utilization of MOFs, as tailored made materials, is promising for the development of new approaches for the selective capture of F-gases and for the separation of blends of these gases, which are used in commercial refrigeration.
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Affiliation(s)
- Julio E. Sosa
- Department of ChemistryLAQVREQUIMTENOVA School of Science and TechnologyNOVA University LisbonCaparica2829‐516Portugal
| | - Carine Malheiro
- Université de Pau et des Pays de l'AdourE2S UPPACNRSTOTALLFCRAnglet64600France
| | - Paulo J. Castro
- Department of ChemistryLAQVREQUIMTENOVA School of Science and TechnologyNOVA University LisbonCaparica2829‐516Portugal
| | - Rui P. P. L. Ribeiro
- Department of ChemistryLAQVREQUIMTENOVA School of Science and TechnologyNOVA University LisbonCaparica2829‐516Portugal
| | - Manuel M. Piñeiro
- Departamento de Física AplicadaFacultade de CienciasUniversidade de VigoVigoE36310Spain
| | - Frédéric Plantier
- Université de Pau et des Pays de l'AdourE2S UPPACNRSTOTALLFCRAnglet64600France
| | - José P. B. Mota
- Department of ChemistryLAQVREQUIMTENOVA School of Science and TechnologyNOVA University LisbonCaparica2829‐516Portugal
| | - João M. M. Araújo
- Department of ChemistryLAQVREQUIMTENOVA School of Science and TechnologyNOVA University LisbonCaparica2829‐516Portugal
| | - Ana B. Pereiro
- Department of ChemistryLAQVREQUIMTENOVA School of Science and TechnologyNOVA University LisbonCaparica2829‐516Portugal
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Zhu H, Huo Y, He X, Wang W, Fang S, Zhang Y. Molecular model construction of Danhou lignite and study on adsorption of CH 4 by oxygen functional groups. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:25368-25381. [PMID: 33454865 DOI: 10.1007/s11356-021-12399-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Accepted: 01/05/2021] [Indexed: 05/27/2023]
Abstract
In view of the frequent occurrence of gas accidents in coal mines, the mechanism of oxygen-containing functional groups (OCFGs) in Danhou lignite adsorbing gas was studied by experiment and simulation. Elemental analysis, X-ray photoelectron spectroscopy (XPS), solid-state 13C nuclear magnetic resonance spectroscopy (13C-NMR), and adsorption experiment of CH4 were applied to establish the macromolecular model of Danhou lignite. Then, molecular mechanics (MM) and molecular dynamics (MD) were utilized to optimize the coal macromolecular model, and the density of coal was determined via adding periodic boundary conditions. The mechanism of gas adsorption by OCFGs was studied by grand canonical Monte Carlo (GCMC) and density functional theory (DFT). The results showed that the aromatic structures mostly exist in the form of pyrenes; the structure of aliphatic carbons are mostly methylene and methine groups; the alkanes are mostly long chains; oxygen atoms are mainly in the form of hydroxyl groups and ether groups; nitrogen atoms are mainly in the form of pyridines; and the density of Danhou lignite is 1.25 g/cm3. The isotherm adsorption curve and Langmuir adsorption curve have a good fit, a single coal molecule reaches saturation after absorbing four CH4 molecules, and the error between experiment and simulation is small. The results of DFT calculation showed that the adsorption of CH4 by OCFGs is affected by the adsorption positions and adsorption directions. Due to CH4 molecules are affected by different electrostatic forces, the adsorption capacities of OCFGs are different, and the order is carbonyl groups > ether bonds > hydroxyl groups > carboxyl groups. The results can be used for reference in the prevention and control of coal and gas outburst.
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Affiliation(s)
- Hongqing Zhu
- School of Emergency Management and Safety Engineering, China University of Mining and Technology (Beijing), No. ding 11 College Road, Haidian District, Beijing, 100083, China
| | - Yujia Huo
- School of Emergency Management and Safety Engineering, China University of Mining and Technology (Beijing), No. ding 11 College Road, Haidian District, Beijing, 100083, China.
| | - Xin He
- School of Emergency Management and Safety Engineering, China University of Mining and Technology (Beijing), No. ding 11 College Road, Haidian District, Beijing, 100083, China
| | - Wei Wang
- School of Emergency Management and Safety Engineering, China University of Mining and Technology (Beijing), No. ding 11 College Road, Haidian District, Beijing, 100083, China
| | - Shuhao Fang
- School of Emergency Management and Safety Engineering, China University of Mining and Technology (Beijing), No. ding 11 College Road, Haidian District, Beijing, 100083, China
| | - Yilong Zhang
- School of Emergency Management and Safety Engineering, China University of Mining and Technology (Beijing), No. ding 11 College Road, Haidian District, Beijing, 100083, China
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Sui H, Zhang F, Wang Z, Wang D, Wang Y. Effect of Kerogen Maturity, Water Content for Carbon Dioxide, Methane, and Their Mixture Adsorption and Diffusion in Kerogen: A Computational Investigation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:9756-9769. [PMID: 32787125 DOI: 10.1021/acs.langmuir.0c01191] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The adsorption behavior of CO2, CH4, and CO2/CH4 mixtures in four different mature kerogens in the absence/presence of water was studied using grand canonical Monte Carlo and classical molecular dynamics methods. The results exhibit that the adsorption isotherms of single-component CO2 or CH4 in kerogen present similar trends and show type I Langmuir adsorption behavior according to the IUPAC classification; the total adsorbed amount of both gases follows the order of type II-A < type II-B < type II-C < type II-D kerogen under the same conditions. The changing behavior of isosteric heat decreases first and then increases, which can explain the heterogeneous characteristic of the kerogen pore surface. The Coulombic and van der Waals interactions between CO2 and kerogens play an important role on adsorption, while for CH4 adsorption, the electrostatic effect is very small, even negligible. The N-, S-, and O-containing groups in kerogen have more remarkable influence on adsorption of CO2 than CH4 because of their strong adsorption energy, therefore notably improving the selectivity of CO2 over CH4 and following the order of type II-A > type II-B > type II-C > type II-D, which is beneficial to carbon capture and storage. Both pressure and temperature have an obvious impact on gas molecule diffusion, and low pressure and high temperature correspond to a large diffusion coefficient. In addition, preabsorbed water has a negative effect on the adsorption of CO2/CH4, and for the same amount of water molecules, the effect follows the order of type II-A > type II-B > type II-C > type II-D kerogens. The binding energy of water-kerogen is stronger than that of pure CH4 or CO2-kerogen. The selectivity of CO2 over CH4 on kerogen increases with an increasing water content.
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Affiliation(s)
- Hongguang Sui
- College of Science, China University of Petroleum, Qingdao, Shandong 266580, China
| | - Fengyun Zhang
- College of Science, China University of Petroleum, Qingdao, Shandong 266580, China
| | - Ziqiang Wang
- Research Institute of Experiment and Detection of PetroChina Xinjiang Oilfield Company, Karamay 834000, China
| | - Diansheng Wang
- College of Science, China University of Petroleum, Qingdao, Shandong 266580, China
| | - Yudou Wang
- College of Science, China University of Petroleum, Qingdao, Shandong 266580, China
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Coupan R, Torré JP, Dicharry C, Hemati M, Plantier F. Kinetics of CO2 Capture by Hydroquinone Clathrates. Ind Eng Chem Res 2018. [DOI: 10.1021/acs.iecr.8b01462] [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)
- Romuald Coupan
- Laboratoire des Fluides Complexes et leurs Réservoirs—IPRA, UMR5150, CNRS/TOTAL/UNIV PAU & PAYS ADOUR, Avenue de l’Université, 64000 Pau, France
| | - Jean-Philippe Torré
- Laboratoire des Fluides Complexes et leurs Réservoirs—IPRA, UMR5150, CNRS/TOTAL/UNIV PAU & PAYS ADOUR, Avenue de l’Université, 64000 Pau, France
| | - Christophe Dicharry
- Laboratoire des Fluides Complexes et leurs Réservoirs—IPRA, UMR5150, CNRS/TOTAL/UNIV PAU & PAYS ADOUR, Avenue de l’Université, 64000 Pau, France
| | - Mehrdji Hemati
- Laboratoire de Génie Chimique (LGC), ENSIACET, INPT, Université de Toulouse—Paul Sabatier, CNRS—UMR 5503, 5 rue Paulin Talabot, BP 1301, Toulouse F-31106, France
| | - Frédéric Plantier
- Laboratoire des Fluides Complexes et leurs Réservoirs-IPRA, UMR5150, CNRS/TOTAL/UNIV PAU & PAYS ADOUR, Allée du parc Montaury, 64600, Anglet, France
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Perrier L, Plantier F, Grégoire D. A novel experimental setup for simultaneous adsorption and induced deformation measurements in microporous materials. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2017; 88:035104. [PMID: 28372409 DOI: 10.1063/1.4977595] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A new experimental setup is presented allowing the simultaneous measurement of adsorption isotherms and adsorption-induced deformations. It is composed of a manometric technique coupled with a digital image correlation setup for full-field displacement measurements. The manometric part is validated by comparing adsorption isotherms with those obtained by a gravimetric method. The principles and methods of both adsorption isotherm and induced deformation measurements are presented in detail. As a first application of this new apparatus, the coupling between adsorption and induced deformation is characterised for a microporous media (activated carbon) saturated by pure CO2 (318.15 K, [0-60] bars) and pure CH4 (303.15 K, [0-130] bars). For this very homogeneous porous material, the induced deformation is characteristic of a pure volumetric swelling but the full-field setup may allow the characterisation of the localised pattern of deformation for heterogenous or cracked microporous media.
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Affiliation(s)
- L Perrier
- University Pau & Pays Adour, Laboratoire des Fluides Complexes et leurs Réservoirs, LFCR-IPRA, UMR5150, 64600 Anglet, France
| | - F Plantier
- University Pau & Pays Adour, Laboratoire des Fluides Complexes et leurs Réservoirs, LFCR-IPRA, UMR5150, 64600 Anglet, France
| | - D Grégoire
- University Pau & Pays Adour, Laboratoire des Fluides Complexes et leurs Réservoirs, LFCR-IPRA, UMR5150, 64600 Anglet, France
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