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Jia H, Fan F, Wang Q, Shen Z, Wang Y, Sun H, Pei P, Li C, Lv K, Huang P. Molecular Insights into the Dual Promotion-Inhibition Effects of NaCl at Various Concentrations on the CO 2 Hydrate Growth: A Molecular Simulation Study. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:9012-9019. [PMID: 38625688 DOI: 10.1021/acs.langmuir.4c00315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/17/2024]
Abstract
Hydrate-based CO2 storage in the ocean is considered a potential method for mitigating the greenhouse effect. Numerous studies demonstrated that NaCl exhibited the dual effects of promotion and inhibition in the nucleation and growth processes of CO2 hydrate, whose mechanisms remain unclear. In this study, the effects of NaCl at various concentrations on the CO2 hydrate growth and crystal are investigated. The independent gradient model based on Hirshfeld partition, electrostatic potential, and binding energy is conducted to study the interaction between ions and water molecules. The motion trajectories of ions are observed at the molecular level to reflect the impact of ion motion on hydrate growth. The results show that the influence of NaCl on hydrate growth depends on a delicate balance of dual promotion-inhibition effects. NaCl can combine more water molecules and provide a transport channel of CO2 to promote hydrate growth at low concentrations. Meanwhile, the promoting effects shift toward inhibition with increasing NaCl concentrations. In a word, this paper proposes a novel mechanism for the dual promotion-inhibition effects of NaCl on hydrate growth, which is significant for further research on hydrate-based CO2 storage in the ocean.
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Affiliation(s)
- Han Jia
- Shandong Key Laboratory of Oilfield Chemistry, School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China
- Key Laboratory of Unconventional Oil & Gas Development, China University of Petroleum (East China), Ministry of Education, Qingdao 266580, China
| | - Fangning Fan
- Shandong Key Laboratory of Oilfield Chemistry, School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China
- Key Laboratory of Unconventional Oil & Gas Development, China University of Petroleum (East China), Ministry of Education, Qingdao 266580, China
| | - Qiuxia Wang
- Bohai Oilfield Research Institute, Tianjin Branch, CNOOC China Limited, Tianjin 300459, China
| | - Zhihao Shen
- Shandong Key Laboratory of Oilfield Chemistry, School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China
- Key Laboratory of Unconventional Oil & Gas Development, China University of Petroleum (East China), Ministry of Education, Qingdao 266580, China
| | - Yuanbo Wang
- Shandong Key Laboratory of Oilfield Chemistry, School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China
- Key Laboratory of Unconventional Oil & Gas Development, China University of Petroleum (East China), Ministry of Education, Qingdao 266580, China
| | - Han Sun
- Shandong Key Laboratory of Oilfield Chemistry, School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China
- Key Laboratory of Unconventional Oil & Gas Development, China University of Petroleum (East China), Ministry of Education, Qingdao 266580, China
| | - Pingan Pei
- Shandong Key Laboratory of Oilfield Chemistry, School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China
- Key Laboratory of Unconventional Oil & Gas Development, China University of Petroleum (East China), Ministry of Education, Qingdao 266580, China
| | - Chuanqi Li
- Shandong Key Laboratory of Oilfield Chemistry, School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China
- Key Laboratory of Unconventional Oil & Gas Development, China University of Petroleum (East China), Ministry of Education, Qingdao 266580, China
| | - Kaihe Lv
- Shandong Key Laboratory of Oilfield Chemistry, School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China
- Key Laboratory of Unconventional Oil & Gas Development, China University of Petroleum (East China), Ministry of Education, Qingdao 266580, China
| | - Pan Huang
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, AB T6G 1H9, Canada
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Zhang W, Wang Y, Lang X, Fan S. Interfacial Adhesion Forces of Hydrate Particles in the Presence of Hydrate Inhibitors. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:15526-15533. [PMID: 36475693 DOI: 10.1021/acs.langmuir.2c02124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Hydrate inhibitors are traditionally utilized to prevent hydrate plugging. In this study, the adhesion forces of cyclopentane (CP) hydrates with thermodynamic inhibitors (ethanol, urea, and NaCl) and anti-agglomerant inhibitors [sorbitan monooleate (Span 80) and lecithin] were measured to understand the effects of hydrate inhibitors on the adhesion forces of hydrates. It was found that the thermodynamic inhibitors increased the early hydrate interparticle adhesion force due to the enhanced liquid bridge force. However, the liquid bridge acted as a lubricant layer to prevent the irreversible agglomeration of hydrate after long-term contact. The hydrate adhesion forces decreased by 90.5-93.0% and 76.6-92.7% with an increase in the concentration of Span 80 and lecithin, respectively, from 0.1 to 1 wt %. Both rough morphology and low interfacial tension contributed to the adhesion force decrease of hydrate after the addition of anti-agglomerant inhibitors. The results may be helpful for understanding the mechanism of influence and quantifying the impact of hydrate inhibitors on hydrate interparticle adhesion force.
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Affiliation(s)
- Wenjuan Zhang
- School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou510640, China
| | - Yanhong Wang
- School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou510640, China
- Zhuahai Institute of Modern Industrial Innovation, South China University of Technology, Zhuhai519175, China
| | - Xuemei Lang
- School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou510640, China
| | - Shuanshi Fan
- School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou510640, China
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Bak IG, Chae CG, Choi J, Song WY, Seo J, Lee E, Lee JS. Synthesis of Alternating Polyisocyanate Copolymers by Anionic Polymerization for Mimicking Amphiphilic Helical Peptides. Angew Chem Int Ed Engl 2022; 61:e202212398. [PMID: 36268639 DOI: 10.1002/anie.202212398] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Indexed: 11/18/2022]
Abstract
The amphiphilic conformation of α-helical peptides has important biological functions, such as ion transport, antifreeze, and innate immunity, which can be mimicked by alternating polyisocyanate copolymers. We synthesized poly(allyl isocyanate-alt-(S)-(-)-α-methylbenzyl isocyanate (P(AIC-alt-SMBIC)) and ammonium-containing P(AIC-alt-SMBIC) (N-P(AIC-alt-SMBIC)), ensuring the amphiphilic helical conformation. The benzyl group of SMBIC plays an important role in alternating copolymerization with its steric and electron-withdrawing effects, while AIC provides an alkene group capable of introducing a customized functional group. The P(AIC-alt-SMBIC) with predominantly alternating sequence was acquired at fSMBIC /fAIC =8 with a controlled molecular weight and narrow dispersity. N-P(AIC-alt-SMBIC)s were synthesized from thiol-ene radical addition with P(AIC-alt-SMBIC).
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Affiliation(s)
- In Gyu Bak
- School of Materials Science and Engineering, Gwangju Institute of Science and Technology (GIST), 123 Cheomdangwagi-ro, Buk-gu, Gwangju, 61005, Republic of Korea
| | - Chang-Guen Chae
- Advanced Materials Division, Korea Research Institute of Chemical Technology (KRICT), 141 Gajeong-ro, Yuseong-gu, Daejeon, 34114, Republic of Korea
| | - Jieun Choi
- Department of Chemistry, Gwangju Institute of Science and Technology (GIST), 123 Cheomdangwagi-ro, Buk-gu, Gwangju, 61005, Republic of Korea
| | - Woo-Young Song
- School of Earth Sciences and Environmental Engineering, Gwangju Institute of Science and Technology (GIST), 123 Cheomdangwagi-ro, Buk-gu, Gwangju, 61005, Republic of Korea
| | - Jiwon Seo
- Department of Chemistry, Gwangju Institute of Science and Technology (GIST), 123 Cheomdangwagi-ro, Buk-gu, Gwangju, 61005, Republic of Korea
| | - Eunji Lee
- School of Materials Science and Engineering, Gwangju Institute of Science and Technology (GIST), 123 Cheomdangwagi-ro, Buk-gu, Gwangju, 61005, Republic of Korea
| | - Jae-Suk Lee
- School of Materials Science and Engineering, Gwangju Institute of Science and Technology (GIST), 123 Cheomdangwagi-ro, Buk-gu, Gwangju, 61005, Republic of Korea
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Wang D, Li D, Kelland MA, Cai H, Wang J, Xu Y, Lu P, Dong J. Unraveling Amphiphilic Poly( N-vinylcaprolactam)/Water Interface by Nuclear Magnetic Resonance Relaxometry: Control of Clathrate Hydrate Formation Kinetics. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:4774-4784. [PMID: 35380846 DOI: 10.1021/acs.langmuir.2c00472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Water-soluble amphiphilic polymers are vital chemicals in the oil and gas industry to retard crystal growth of hydrocarbon hydrate via surface adsorption and suppress nucleation of a pristine hydrate nucleus, thereby preventing formation of hydrate blockages in flow lines during oil and natural gas production. Apart from a few theoretical modeling studies, an experimental method to study the polymer/water interface in the crystal growth is critically needed. Here, water motions in the hydration shells of an exemplary kinetic inhibitor, poly(N-vinylcaprolactam), during hydrate formation from the tetrahydrofuran/water system are revealed via nuclear magnetic resonance relaxometry. Unequivocal experiments show that the pivotal interfacial water in the tightly bound state gradually freezes at rates depending on the polymer molecular weight (MW). This is supported by nonfreezable water analysis, which is correlated to the inhibition time. The polymers tune the kinetics of the hydration process via interaction with and perturbation of the water molecules. The free water component in the polymer solution crystallizes at a very slow rate when in partially restricted mobility, whereas the bound water component increases in the reaction, with the polymer/water interface serving as the reaction sites. The appropriate MW (including average MW and polydispersity values) of the inhibitive polymers can give rise to maximal retardation of the hydrate crystal growth. This work will help control other multiphase crystallization kinetic processes through the design of inhibitors or promoters functioning in the interface.
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Affiliation(s)
- Dong Wang
- College of Chemistry and Chemical Engineering, Shaoxing University, Shaoxing, Zhejiang Province 312000, China
| | - Dongfang Li
- College of Chemistry and Chemical Engineering, Shaoxing University, Shaoxing, Zhejiang Province 312000, China
| | - Malcolm A Kelland
- Department of Chemistry, Bioscience and Environmental Engineering, Faculty of Science and Technology, University of Stavanger, Stavanger N-4036, Norway
| | - Haokun Cai
- Ningbo Academy of Product and Food Quality Inspection (Ningbo Fiber Inspection Institute), Ningbo, Zhejiang Province 315048, China
| | - Jie Wang
- College of Chemistry and Chemical Engineering, Shaoxing University, Shaoxing, Zhejiang Province 312000, China
| | - Ying Xu
- College of Chemistry and Chemical Engineering, Shaoxing University, Shaoxing, Zhejiang Province 312000, China
| | - Ping Lu
- College of Chemistry and Chemical Engineering, Shaoxing University, Shaoxing, Zhejiang Province 312000, China
| | - Jian Dong
- College of Chemistry and Chemical Engineering, Shaoxing University, Shaoxing, Zhejiang Province 312000, China
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Effect of Thiouronium-Based Ionic Liquids on the Formation and Growth of CO 2 (sI) and THF (sII) Hydrates. Int J Mol Sci 2022; 23:ijms23063292. [PMID: 35328713 PMCID: PMC8955390 DOI: 10.3390/ijms23063292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Revised: 03/15/2022] [Accepted: 03/17/2022] [Indexed: 11/21/2022] Open
Abstract
In this manuscript, two thiouronium-based ionic liquids (ILs), namely 2-ethylthiouronium bromide [C2th][Br] and 2-(hydroxyethyl)thiouronium bromide [C2OHth][Br], were tested at different concentrations (1 and 10 wt%) for their ability to affect CO2 (sI) and tetrahydrofuran (THF) (sII) hydrate formation and growth. Two different methods were selected to perform a thermodynamic and kinetic screening of the CO2 hydrates using a rocking cell apparatus: (i) an isochoric pressure search method to map the hydrate phase behavior and (ii) a constant ramping method to obtain the hydrate formation and dissociation onset temperatures. A THF hydrate crystal growth method was also used to determine the effectiveness of the ILs in altering the growth of type sII hydrates at atmospheric pressure. Hydrate–liquid–vapor equilibrium measurements revealed that both ILs act as thermodynamic inhibitors at 10 wt% and suppress the CO2 hydrate equilibria ~1.2 °C. The constant ramping methodology provides interesting results and reveals that [C2OHth][Br] suppresses the nucleation onset temperature and delays the decomposition onset temperatures of CO2 hydrates at 1 wt%, whereas suppression by [C2th][Br] was not statistically significant. Normalized pressure plots indicate that the presence of the ILs slowed down the growth as well as the decomposition rates of CO2 hydrates due to the lower quantity of hydrate formed in the presence of 1 wt% ILs. The ILs were also found to be effective in inhibiting the growth of type sII THF hydrates without affecting their morphology. Therefore, the studied thiouronium ILs can be used as potential dual-function hydrate inhibitors. This work also emphasizes the importance of the methods and conditions used to screen an additive for altering hydrate formation and growth.
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Bak IG, Chae CG, Lee JS. Synthetic Control of Helical Polyisocyanates by Living Anionic Polymerization toward Peptide Mimicry. Macromolecules 2022. [DOI: 10.1021/acs.macromol.1c02160] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- In Gyu Bak
- School of Materials Science and Engineering, Gwangju Institute of Science and Technology (GIST), 123 Cheomdangwagi-ro, Buk-gu, Gwangju 61005, Republic of Korea
| | - Chang-Geun Chae
- Advanced Materials Division, Korea Research Institute of Chemical Technology (KRICT), 141 Gajeong-ro, Yuseong-gu, Daejeon 34114, Republic of Korea
| | - Jae-Suk Lee
- School of Materials Science and Engineering, Gwangju Institute of Science and Technology (GIST), 123 Cheomdangwagi-ro, Buk-gu, Gwangju 61005, Republic of Korea
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Laroui A, Kelland MA, Wang D, Xu S, Xu Y, Lu P, Dong J. Kinetic Inhibition of Clathrate Hydrate by Copolymers Based on N-Vinylcaprolactam and N-Acryloylpyrrolidine: Optimization Effect of Interfacial Nonfreezable Water of Polymers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:1522-1532. [PMID: 35067060 DOI: 10.1021/acs.langmuir.1c02903] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Amphiphilic polymers have now been designed to achieve an icephobic performance and have been used for ice adhesion prevention. They may function by forming a strongly bonded but nonfreezable water shell which serves as a self-lubricating interfacial layer that weakens the adhesion strength between ice and the surface. Here, an analogous concept is built to prevent the formation of clathrate hydrate compounds during oil and natural gas production, in which amphiphilic water-soluble polymers act as efficient kinetic hydrate inhibitors (KHIs). A novel group of copolymers with N-vinylcaprolactam and N-acryloylpyrrolidine structural units are investigated in this study. The relationships among the amphiphilicity, lower critical solution temperature, nonfreezable bound water, and kinetic hydrate inhibition time are analyzed in terms of the copolymer compositions. Low-field NMR relaxometry revealed the crucial interfacial water in tightly bound dynamic states which led to crystal growth rates changing with the copolymer compositions, in accord with the rotational rheometric analysis results. The nonfreezable bound water layer confirmed by a calorimetry analysis also changes with the polymer amphiphilicity. Therefore, in the interface between the KHI polymers and hydrate, water surrounding the polymers plays a critical role by helping to delay the nucleation and growth of embryonic ice/hydrates. Appropriate amphiphilicity of the copolymers can achieve the optimal interfacial properties for slowing down hydrate crystal growth.
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Affiliation(s)
- Abdelatif Laroui
- College of Chemistry and Chemical Engineering, Shaoxing University, Shaoxing, Zhejiang Province 312000, China
| | - Malcolm A Kelland
- Department of Chemistry, Bioscience and Environmental Engineering, Faculty of Science and Technology, University of Stavanger, N-4036 Stavanger, Norway
| | - Dong Wang
- College of Chemistry and Chemical Engineering, Shaoxing University, Shaoxing, Zhejiang Province 312000, China
| | - Siyuan Xu
- College of Chemistry and Chemical Engineering, Shaoxing University, Shaoxing, Zhejiang Province 312000, China
| | - Ying Xu
- College of Chemistry and Chemical Engineering, Shaoxing University, Shaoxing, Zhejiang Province 312000, China
| | - Ping Lu
- College of Chemistry and Chemical Engineering, Shaoxing University, Shaoxing, Zhejiang Province 312000, China
| | - Jian Dong
- College of Chemistry and Chemical Engineering, Shaoxing University, Shaoxing, Zhejiang Province 312000, China
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Peng Z, Wang W, Cheng L, Yu W, Li K, Liu Y, Wang M, Xiao F, Huang H, Liu Y, Ma Q, Shi B, Gong J. Effect of the Ethylene Vinyl Acetate Copolymer on the Induction of Cyclopentane Hydrate in a Water-in-Waxy Oil Emulsion System. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:13225-13234. [PMID: 34735162 DOI: 10.1021/acs.langmuir.1c01734] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
In this paper, the effect of the ethylene vinyl acetate (EVA) copolymer, commonly used in improving rheological behavior of waxy oil, is introduced to investigate its effect on the formation of cyclopentane hydrate in a water-in-waxy oil emulsion system. The wax content studied shows a negative effect on the formation of hydrate by elongating its induction time. Besides, the EVA copolymer is found to elongate the induction time of cyclopentane hydrate through the cocrystallization effect with wax molecules adjacent to the oil-water interface.
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Affiliation(s)
- Zeheng Peng
- Beijing Key Laboratory of Urban Oil and Gas Distribution Technology, State Key Laboratory of Natural Gas Hydrates, MOE Key Laboratory of Petroleum Engineering, China University of Petroleum-Beijing, No.18 Fuxue Road, Changping, Beijing 102249, PR China
| | - Wei Wang
- Beijing Key Laboratory of Urban Oil and Gas Distribution Technology, State Key Laboratory of Natural Gas Hydrates, MOE Key Laboratory of Petroleum Engineering, China University of Petroleum-Beijing, No.18 Fuxue Road, Changping, Beijing 102249, PR China
| | - Lin Cheng
- Beijing Key Laboratory of Urban Oil and Gas Distribution Technology, State Key Laboratory of Natural Gas Hydrates, MOE Key Laboratory of Petroleum Engineering, China University of Petroleum-Beijing, No.18 Fuxue Road, Changping, Beijing 102249, PR China
| | - Weijie Yu
- Beijing Key Laboratory of Urban Oil and Gas Distribution Technology, State Key Laboratory of Natural Gas Hydrates, MOE Key Laboratory of Petroleum Engineering, China University of Petroleum-Beijing, No.18 Fuxue Road, Changping, Beijing 102249, PR China
| | - Kai Li
- Beijing Key Laboratory of Urban Oil and Gas Distribution Technology, State Key Laboratory of Natural Gas Hydrates, MOE Key Laboratory of Petroleum Engineering, China University of Petroleum-Beijing, No.18 Fuxue Road, Changping, Beijing 102249, PR China
| | - Yingming Liu
- Beijing Key Laboratory of Urban Oil and Gas Distribution Technology, State Key Laboratory of Natural Gas Hydrates, MOE Key Laboratory of Petroleum Engineering, China University of Petroleum-Beijing, No.18 Fuxue Road, Changping, Beijing 102249, PR China
| | - Mengxin Wang
- Beijing Key Laboratory of Urban Oil and Gas Distribution Technology, State Key Laboratory of Natural Gas Hydrates, MOE Key Laboratory of Petroleum Engineering, China University of Petroleum-Beijing, No.18 Fuxue Road, Changping, Beijing 102249, PR China
| | - Fan Xiao
- Beijing Key Laboratory of Urban Oil and Gas Distribution Technology, State Key Laboratory of Natural Gas Hydrates, MOE Key Laboratory of Petroleum Engineering, China University of Petroleum-Beijing, No.18 Fuxue Road, Changping, Beijing 102249, PR China
| | - Huirong Huang
- School of Petroleum Engineering, Chongqing University of Science & Technology, 20 Daxuecheng East Road, Shapingba, Chongqing 401331, PR China
| | - Yang Liu
- Jiangsu Key Laboratory of Oil and Gas Storage and Transportation Technology, Changzhou University, No. 21, Gehu Middle Road, Wujin, Jiangsu, Changzhou 213016, PR China
| | - Qianli Ma
- Jiangsu Key Laboratory of Oil and Gas Storage and Transportation Technology, Changzhou University, No. 21, Gehu Middle Road, Wujin, Jiangsu, Changzhou 213016, PR China
| | - Bohui Shi
- Beijing Key Laboratory of Urban Oil and Gas Distribution Technology, State Key Laboratory of Natural Gas Hydrates, MOE Key Laboratory of Petroleum Engineering, China University of Petroleum-Beijing, No.18 Fuxue Road, Changping, Beijing 102249, PR China
| | - Jing Gong
- Beijing Key Laboratory of Urban Oil and Gas Distribution Technology, State Key Laboratory of Natural Gas Hydrates, MOE Key Laboratory of Petroleum Engineering, China University of Petroleum-Beijing, No.18 Fuxue Road, Changping, Beijing 102249, PR China
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