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Liu Y, Yao C, Liu B, Xuan Y, Du X. Performance Prediction and Heating Parameter Optimization of Organic-Rich Shale In Situ Conversion Based on Numerical Simulation and Artificial Intelligence Algorithms. ACS OMEGA 2024; 9:15511-15526. [PMID: 38585092 PMCID: PMC10993255 DOI: 10.1021/acsomega.4c00323] [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: 01/10/2024] [Revised: 03/07/2024] [Accepted: 03/12/2024] [Indexed: 04/09/2024]
Abstract
In situ conversion technology is a green and effective way to realize the development of organic-rich shale. Supercritical CO2 can be used as a good heating medium for shale in situ conversion. Numerical simulation is an important means to explore the shale in situ conversion process, but it requires a lot of time and computational cost for in situ conversion simulation under different working conditions. Therefore, a computational framework for rapid prediction of shale in situ conversion development performance and heating parameter optimization is proposed by coupling artificial neural network (ANN) and particle swarm optimization (PSO). The results indicated that kerogen pyrolysis and hydrocarbon product release mainly occurred within 2 years of shale in situ conversion. The production curves of pyrolysis hydrocarbon obviously slowed after in situ conversion for 2 years. The database was constructed by a large number of in situ conversion simulations, and Pearson correlation analysis and the random forest method were adopted to obtain seven main controlling factors affecting reservoir temperature and hydrocarbon production. The determination coefficient of the obtained ANN-based prediction models is higher than 97%, and the mean square error (MSE) is lower than 0.3%. The basic reservoir case can choose to inject 350-450 °C supercritical CO2 (Sc-CO2) fluid with a rate of 600 m3/day to obtain a more promising development effect. The heating parameter optimization for three typical reservoir cases using PSO was performed, and reasonable injection temperature and injection rate were obtained. It realized accurate development prediction and rapid heating parameter optimization, which helps the effective application of shale in situ conversion development design.
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Affiliation(s)
- Yaqian Liu
- National
Key Laboratory of Deep Oil and Gas, China
University of Petroleum (East China), Qingdao, Shandong 266580, China
- Key
Laboratory of Unconventional Oil & Gas Development China University of Petroleum (East China), Ministry
of Education, Qingdao, Shandong 266580, China
- School
of Petroleum Engineering, China University
of Petroleum (East China), Qingdao, Shandong 266580, China
| | - Chuanjin Yao
- National
Key Laboratory of Deep Oil and Gas, China
University of Petroleum (East China), Qingdao, Shandong 266580, China
- Key
Laboratory of Unconventional Oil & Gas Development China University of Petroleum (East China), Ministry
of Education, Qingdao, Shandong 266580, China
- School
of Petroleum Engineering, China University
of Petroleum (East China), Qingdao, Shandong 266580, China
| | - Baishuo Liu
- National
Key Laboratory of Deep Oil and Gas, China
University of Petroleum (East China), Qingdao, Shandong 266580, China
- Key
Laboratory of Unconventional Oil & Gas Development China University of Petroleum (East China), Ministry
of Education, Qingdao, Shandong 266580, China
- School
of Petroleum Engineering, China University
of Petroleum (East China), Qingdao, Shandong 266580, China
| | - Yangyang Xuan
- National
Key Laboratory of Deep Oil and Gas, China
University of Petroleum (East China), Qingdao, Shandong 266580, China
- Key
Laboratory of Unconventional Oil & Gas Development China University of Petroleum (East China), Ministry
of Education, Qingdao, Shandong 266580, China
- School
of Petroleum Engineering, China University
of Petroleum (East China), Qingdao, Shandong 266580, China
| | - Xinge Du
- National
Key Laboratory of Deep Oil and Gas, China
University of Petroleum (East China), Qingdao, Shandong 266580, China
- Key
Laboratory of Unconventional Oil & Gas Development China University of Petroleum (East China), Ministry
of Education, Qingdao, Shandong 266580, China
- School
of Petroleum Engineering, China University
of Petroleum (East China), Qingdao, Shandong 266580, China
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Molecular dynamics simulation of sub- and supercritical water extraction shale oil in slit nanopores. J Supercrit Fluids 2023. [DOI: 10.1016/j.supflu.2023.105862] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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3
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Sun S, Liang S, Liu Y, Liu D, Gao M, Tian Y, Wang J. A Review on Shale Oil and Gas Characteristics and Molecular Dynamics Simulation for the Fluid Behavior in Shale Pore. J Mol Liq 2023. [DOI: 10.1016/j.molliq.2023.121507] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2023]
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4
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Comprehensive review on physical properties of supercritical carbon dioxide calculated by molecular simulation. KOREAN J CHEM ENG 2023. [DOI: 10.1007/s11814-022-1316-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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5
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Zhao S, Su J, Wu J, Xiaoshu L. Release Mechanism of Volatile Products from Oil Shale Pressure-Controlled Pyrolysis Induced by Supercritical Carbon Dioxide. ACS OMEGA 2022; 7:47330-47340. [PMID: 36570204 PMCID: PMC9774379 DOI: 10.1021/acsomega.2c06693] [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: 10/17/2022] [Accepted: 12/01/2022] [Indexed: 06/17/2023]
Abstract
The compactness of the oil shale reservoir and the complexity of the pore structure lead to the secondary reaction of kerogen in the process of hydrocarbon expulsion, which reduces the effective recovery of shale oil. In this paper, supercritical carbon dioxide was used as a heat carrier and a displacement medium. In a self-designed fluidized bed experimental system for pressure-controlled pyrolysis of oil shale, the experiments of oil shale pyrolysis under standard atmospheric pressure and 7.8-8.0 MPa pressure in nitrogen and carbon dioxide atmospheres were completed. The extraction efficiency of supercritical carbon dioxide at low temperature is obvious, but with the increase of temperature, the effect of extraction on pyrolysis is lower than that of temperature. Under a nitrogen atmosphere, the secondary reaction of shale oil is mainly secondary pyrolysis and aromatization. However, in a supercritical carbon dioxide atmosphere, the main reactions are secondary addition and aromatization. In addition, compared with that in the standard atmospheric pressure, it was found that the olefin synthesis reaction was obviously inhibited under a high-pressure nitrogen or supercritical carbon dioxide atmosphere.
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Affiliation(s)
- Shuai Zhao
- State
Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective
Development, Beijing 1100083, China
- State
Center Research and Development of Oil Shale Exploitation, Beijing 1100083, China
- School
of Mines, China University of Mining and
Technology, XuZhou 221116, China
| | - Jianzheng Su
- State
Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective
Development, Beijing 1100083, China
- State
Center Research and Development of Oil Shale Exploitation, Beijing 1100083, China
| | - Junwen Wu
- State
Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective
Development, Beijing 1100083, China
- State
Center Research and Development of Oil Shale Exploitation, Beijing 1100083, China
| | - Lü Xiaoshu
- Department
of Electrical Engineering and Energy Technology, University of Vaasa, P.O. Box 700, Vaasa FIN-65101, Finland
- Department
of Civil Engineering, Aalto University, P.O. Box 11000, Espoo FIN-02130, Finland
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6
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Hu Y, Mu S, Zhang J, Li Q. Regional distribution, properties, treatment technologies, and resource utilization of oil-based drilling cuttings: A review. CHEMOSPHERE 2022; 308:136145. [PMID: 36029858 DOI: 10.1016/j.chemosphere.2022.136145] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Revised: 08/07/2022] [Accepted: 08/18/2022] [Indexed: 06/15/2023]
Abstract
Oil-based drilling cuttings (OBDC) are hazardous wastes produced during the extensive use of oil-based drilling mud in oil and gas exploration and development. They have strong mutagenic, carcinogenic, and teratogenic effects and need to be properly disposed of to avoid damaging the natural environment. This paper reviews the recent research progress on the regional distribution, properties, treatment technologies, and resource utilization of OBDC. The advantages and disadvantages of different technologies for removing petroleum pollutants from OBDC were comprehensively analyzed, and required future developments in treatment technologies were proposed.
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Affiliation(s)
- Yuansi Hu
- Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu 611756, China
| | - Shiqi Mu
- Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu 611756, China
| | - Jingjing Zhang
- Sichuan Solid Waste and Chemicals Management Center, Chengdu, 610036, China
| | - Qibin Li
- Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu 611756, China.
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Yu T, Li Q, Tan Y, Xu L. Molecular dynamics simulation of CO2-N2 dissolution and stripping of oil films on pore walls based on intermolecular interaction energy. Chem Eng Sci 2022. [DOI: 10.1016/j.ces.2022.118044] [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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Lu Y, Wang Z, Kang Z, Li W, Yang D, Zhao Y. Comparative study on the pyrolysis behavior and pyrolysate characteristics of Fushun oil shale during anhydrous pyrolysis and sub/supercritical water pyrolysis. RSC Adv 2022; 12:16329-16341. [PMID: 35747525 PMCID: PMC9158388 DOI: 10.1039/d2ra02282f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Accepted: 05/18/2022] [Indexed: 02/03/2023] Open
Abstract
Injected steam can be converted to the sub/supercritical state during the in situ exploitation of oil shale. Thus, the pyrolysis behavior and pyrolysate characteristic of Fushun oil shale during anhydrous pyrolysis and sub/supercritical water pyrolysis were fully compared. The results revealed that the discharged oil yields from sub/supercritical water pyrolysis were 5.44 and 14.33 times that from anhydrous pyrolysis at 360 °C and 450 °C, which was due to the extraction and driving effect of sub/supercritical water. Also, sub/supercritical water could facilitate the discharge and migration of shale oil from the pores and channels. The H2 and CO2 yields in sub/supercritical water pyrolysis were higher than that in anhydrous pyrolysis, resulting from the water–gas shift reaction. The component of shale oil was dominated by saturated hydrocarbons in anhydrous pyrolysis, which accounted for 50–65%. In contrast, a large amount of asphaltenes and resins was formed during pyrolysis in sub/supercritical water due to the solvent effect and weak thermal cracking. The shale oil from anhydrous pyrolysis was lighter than that from sub/supercritical water pyrolysis. Sub/supercritical water reduced the geochemical characteristic indices and lowered the hydrocarbon generation potential and maturity of solid residuals, which can be attributed to the fact that more organic matter was depolymerized and released. The pyrolysate characteristic of oil shale in sub/supercritical water pyrolysis was controlled by multiple mechanisms, including solvent and driving effect, chemical hydrogen-donation and acid–base catalysis. Sub/supercritical water can directly extract oil and gas from oil shale due to the solvent and driving effects. Also, they can be considered as an acid–base catalyst, which can catalyze some reactions such as hydrolysis, addition and rearrangement.![]()
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Affiliation(s)
- Yang Lu
- Key Laboratory of In situ Property Improving Mining of Ministry of Education, Taiyuan University of Technology Taiyuan 030024 China .,The In situ Steam Injection Branch of State Center for Research and Development of Oil Shale Exploitation, Taiyuan University of Technology Taiyuan 030024 China
| | - Zhijing Wang
- Key Laboratory of In situ Property Improving Mining of Ministry of Education, Taiyuan University of Technology Taiyuan 030024 China .,The In situ Steam Injection Branch of State Center for Research and Development of Oil Shale Exploitation, Taiyuan University of Technology Taiyuan 030024 China
| | - Zhiqin Kang
- Key Laboratory of In situ Property Improving Mining of Ministry of Education, Taiyuan University of Technology Taiyuan 030024 China .,The In situ Steam Injection Branch of State Center for Research and Development of Oil Shale Exploitation, Taiyuan University of Technology Taiyuan 030024 China
| | - Wei Li
- Institute of Unconventional Oil and Gas, Northeast Petroleum University Daqing 163318 China
| | - Dong Yang
- Key Laboratory of In situ Property Improving Mining of Ministry of Education, Taiyuan University of Technology Taiyuan 030024 China .,The In situ Steam Injection Branch of State Center for Research and Development of Oil Shale Exploitation, Taiyuan University of Technology Taiyuan 030024 China
| | - Yangsheng Zhao
- Key Laboratory of In situ Property Improving Mining of Ministry of Education, Taiyuan University of Technology Taiyuan 030024 China .,The In situ Steam Injection Branch of State Center for Research and Development of Oil Shale Exploitation, Taiyuan University of Technology Taiyuan 030024 China.,College of Mining Engineering, Taiyuan University of Technology Taiyuan 030024 China
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Zhou W, Jiang L, Liu X, Hu Y, Yan Y. Molecular insights into the effect of anionic-nonionic and cationic surfactant mixtures on interfacial properties of oil-water interface. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.128259] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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10
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Yu T, Li Q, Hu H, Tan Y, Xu L. Molecular dynamics simulation of the interfacial wetting behavior of brine/sandstone with different salinities. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2021.127807] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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11
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Phase Behavior and Composition Distribution of Multiphase Hydrocarbon Binary Mixtures in Heterogeneous Nanopores: A Molecular Dynamics Simulation Study. NANOMATERIALS 2021; 11:nano11092431. [PMID: 34578747 PMCID: PMC8465818 DOI: 10.3390/nano11092431] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Revised: 09/15/2021] [Accepted: 09/15/2021] [Indexed: 11/29/2022]
Abstract
In this study, molecular dynamics (MD) simulation is used to investigate the phase behavior and composition distribution of an ethane/heptane binary mixture in heterogeneous oil-wet graphite nanopores with pore size distribution. The pore network system consists of two different setups of connected bulk and a 5-nm pore in the middle; and the bulk connected to 5-nm and 2-nm pores. Our results show that nanopore confinement influences the phase equilibrium of the multicomponent hydrocarbon mixtures and this effect is stronger for smaller pores. We recognized multiple adsorbed layers of hydrocarbon molecules near the pore surface. However, for smaller pores, adsorption is dominant so that, for the 2-nm pore, most of the hydrocarbon molecules are in the adsorbed phase. The MD simulation results revealed that the overall composition of the hydrocarbon mixture is a function of pore size. This has major implications for macro-scale unconventional reservoir simulation, as it suggests that heterogenous shale nanopores would host fluids with different compositions depending on the pore size. The results of this paper suggest that modifications should be made to the calculation of overall composition of reservoir fluids in shale nanopores, as using only one overall composition for the entire heterogenous reservoir can result in significant error in recovery estimations.
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A Review on the Influence of CO2/Shale Interaction on Shale Properties: Implications of CCS in Shales. ENERGIES 2020. [DOI: 10.3390/en13123200] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Carbon capture and storage (CCS) is a developed technology to minimize CO2 emissions and reduce global climate change. Currently, shale gas formations are considered as a suitable target for CO2 sequestration projects predominantly due to their wide availability. Compared to conventional geological formations including saline aquifers and coal seams, depleted shale formations provide larger storage potential due to the high adsorption capacity of CO2 compared to methane in the shale formation. However, the injected CO2 causes possible geochemical interactions with the shale formation during storage applications and CO2 enhanced shale gas recovery (ESGR) processes. The CO2/shale interaction is a key factor for the efficiency of CO2 storage in shale formations, as it can significantly alter the shale properties. The formation of carbonic acid from CO2 dissolution is the main cause for the alterations in the physical, chemical and mechanical properties of the shale, which in return affects the storage capacity, pore properties, and fluid transport. Therefore, in this paper, the effect of CO2 exposure on shale properties is comprehensively reviewed, to gain an in-depth understanding of the impact of CO2/shale interaction on shale properties. This paper reviews the current knowledge of the CO2/shale interactions and describes the results achieved to date. The pore structure is one of the most affected properties by CO2/shale interactions; several scholars indicated that the differences in mineral composition for shales would result in wide variations in pore structure system. A noticeable reduction in specific surface area of shales was observed after CO2 treatment, which in the long-term could decrease CO2 adsorption capacity, affecting the CO2 storage efficiency. Other factors including shale sedimentary, pressure and temperature can also alter the pore system and decrease the shale “caprock” seal efficiency. Similarly, the alteration in shales’ surface chemistry and functional species after CO2 treatment may increase the adsorption capacity of CO2, impacting the overall storage potential in shales. Furthermore, the injection of CO2 into shales may also influence the wetting behavior. Surface wettability is mainly affected by the presented minerals in shale, and less affected by brine salinity, temperature, organic content, and thermal maturity. Mainly, shales have strong water-wetting behavior in the presence of hydrocarbons, however, the alteration in shale’s wettability towards CO2-wet will significantly minimize CO2 storage capacities, and affect the sealing efficiency of caprock. The CO2/shale interactions were also found to cause noticeable degradation in shales’ mechanical properties. CO2 injection can weaken shale, decrease its brittleness and increases its plasticity and toughness. Various reductions in tri-axial compressive strength, tensile strength, and the elastic modulus of shales were observed after CO2 injection, due to the dissolution effect and adsorption strain within the pores. Based on this review, we conclude that CO2/shale interaction is a significant factor for the efficiency of CCS. However, due to the heterogeneity of shales, further studies are needed to include various shale formations and identify how different shales’ mineralogy could affect the CO2 storage capacity in the long-term.
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Micro- and Macroscale Consequences of Interactions between CO2 and Shale Rocks. ENERGIES 2020. [DOI: 10.3390/en13051167] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
In carbon storage activities, and in shale oil and gas extraction (SOGE) with carbon dioxide (CO2) as stimulation fluid, CO2 comes into contact with shale rock and its pore fluid. As a reactive fluid, the injected CO2 displays a large potential to modify the shale’s chemical, physical, and mechanical properties, which need to be well studied and documented. The state of the art on shale–CO2 interactions published in several review articles does not exhaust all aspects of these interactions, such as changes in the mechanical, petrophysical, or petrochemical properties of shales. This review paper presents a characterization of shale rocks and reviews their possible interaction mechanisms with different phases of CO2. The effects of these interactions on petrophysical, chemical and mechanical properties are highlighted. In addition, a novel experimental approach is presented, developed and used by our team to investigate mechanical properties by exposing shale to different saturation fluids under controlled temperatures and pressures, without modifying the test exposure conditions prior to mechanical and acoustic measurements. This paper also underlines the major knowledge gaps that need to be filled in order to improve the safety and efficiency of SOGE and CO2 storage.
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Zhang Y, Fang T, Li R, Yan Y, Guo W, Zhang J. Molecular insight into the oil charging mechanism in tight reservoirs. Chem Eng Sci 2020. [DOI: 10.1016/j.ces.2019.115297] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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15
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Safder M, Temelli F, Ullah A. Supercritical CO2 extraction and solvent-free rapid alternative bioepoxy production from spent hens. J CO2 UTIL 2019. [DOI: 10.1016/j.jcou.2019.07.029] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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16
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Liu X, Cui P, Ling Q, Zhao Z, Xie R. A review on co-pyrolysis of coal and oil shale to produce coke. Front Chem Sci Eng 2019. [DOI: 10.1007/s11705-019-1850-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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17
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Fang T, Wang M, Gao Y, Zhang Y, Yan Y, Zhang J. Enhanced oil recovery with CO2/N2 slug in low permeability reservoir: Molecular dynamics simulation. Chem Eng Sci 2019. [DOI: 10.1016/j.ces.2018.12.016] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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18
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Effect of Carbon Nanotube Addition on the Interfacial Adhesion between Graphene and Epoxy: A Molecular Dynamics Simulation. Polymers (Basel) 2019; 11:polym11010121. [PMID: 30960105 PMCID: PMC6401875 DOI: 10.3390/polym11010121] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2018] [Revised: 12/28/2018] [Accepted: 01/09/2019] [Indexed: 11/24/2022] Open
Abstract
The pullout process of graphene from an epoxy/graphene composite filled with a carbon nanotube (CNT) was simulated by molecular dynamics simulations. The interaction energy and the interfacial adhesion energy were calculated to analyze the effect of CNT addition on the interfacial adhesion between the graphene and the epoxy matrix, with varying CNT radii, distances between the CNT and the graphene sheet, CNT axial directions, and the number of CNT walls. Generally, the addition of a CNT strengthens the interfacial adhesion between the graphene and the polymer matrix. Firstly, a larger CNT radius induces a stronger interfacial adhesion of graphene with the matrix. Secondly, when the CNT is farther away from the graphene sheet, the interfacial adhesion of graphene with the matrix becomes weaker. Thirdly, the CNT axial direction has little effect on the interfacial adhesion of graphene in the equilibrium structure. However, it plays an important role in the graphene pullout process. Finally, compared with a single-walled CNT, the interfacial adhesion between graphene and the matrix is stronger when a double-walled CNT is added to the matrix.
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Zheng H, Du Y, Xue Q, Zhu L, Li X, Lu S, Jin Y. Surface Effect on Oil Transportation in Nanochannel: a Molecular Dynamics Study. NANOSCALE RESEARCH LETTERS 2017; 12:413. [PMID: 28622718 PMCID: PMC5472647 DOI: 10.1186/s11671-017-2161-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2017] [Accepted: 05/24/2017] [Indexed: 06/08/2023]
Abstract
In this work, we investigate the dynamics mechanism of oil transportation in nanochannel using molecular dynamics simulations. It is demonstrated that the interaction between oil molecules and nanochannel has a great effect on the transportation properties of oil in nanochannel. Because of different interactions between oil molecules and channel, the center of mass (COM) displacement of oil in a 6-nm channel is over 30 times larger than that in a 2-nm channel, and the diffusion coefficient of oil molecules at the center of a 6-nm channel is almost two times more than that near the channel surface. Besides, it is found that polarity of oil molecules has the effect on impeding oil transportation, because the electrostatic interaction between polar oil molecules and channel is far larger than that between nonpolar oil molecules and channel. In addition, channel component is found to play an important role in oil transportation in nanochannel, for example, the COM displacement of oil in gold channel is very few due to great interaction between oil and gold substrate. It is also found that nano-sized roughness of channel surface greatly influences the speed and flow pattern of oil. Our findings would contribute to revealing the mechanism of oil transportation in nanochannels and therefore are very important for design of oil extraction in nanochannels.
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Affiliation(s)
- Haixia Zheng
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Qingdao, 266580 Shandong People’s Republic of China
- College of Science, China University of Petroleum, Qingdao, 266580 Shandong People’s Republic of China
| | - Yonggang Du
- College of Science, China University of Petroleum, Qingdao, 266580 Shandong People’s Republic of China
| | - Qingzhong Xue
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Qingdao, 266580 Shandong People’s Republic of China
- College of Science, China University of Petroleum, Qingdao, 266580 Shandong People’s Republic of China
| | - Lei Zhu
- College of Science, China University of Petroleum, Qingdao, 266580 Shandong People’s Republic of China
| | - Xiaofang Li
- College of Science, China University of Petroleum, Qingdao, 266580 Shandong People’s Republic of China
| | - Shuangfang Lu
- Institute of Unconventional Oil & Gas and New Energy, China University of Petroleum, Qingdao, 266580 Shandong People’s Republic of China
| | - Yakang Jin
- College of Science, China University of Petroleum, Qingdao, 266580 Shandong People’s Republic of China
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Hou L, Jiang T, Liu H, Geng X, Sun B, Li G, Meng S. An evaluation method of supercritical CO2 thickening result for particle transporting. J CO2 UTIL 2017. [DOI: 10.1016/j.jcou.2017.07.023] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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21
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Hou L, Sun B, Geng X, Jiang T, Wang Z. Study of the slippage of particle/supercritical CO2 two-phase flow. J Supercrit Fluids 2017. [DOI: 10.1016/j.supflu.2016.09.016] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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