1
|
Phan A, Stamatakis M, Koh CA, Striolo A. Microscopic insights on clathrate hydrate growth from non-equilibrium molecular dynamics simulations. J Colloid Interface Sci 2023; 649:185-193. [PMID: 37348338 DOI: 10.1016/j.jcis.2023.06.032] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2023] [Revised: 05/03/2023] [Accepted: 06/06/2023] [Indexed: 06/24/2023]
Abstract
Clathrate hydrates form and grow at interfaces. Understanding the relevant molecular processes is crucial for developing hydrate-based technologies. Many computational studies focus on hydrate growth within the aqueous phase using the 'direct coexistence method', which is limited in its ability to investigate hydrate film growth at hydrocarbon-water interfaces. To overcome this shortcoming, a new simulation setup is presented here, which allows us to study the growth of a methane hydrate nucleus in a system where oil-water, hydrate-water, and hydrate-oil interfaces are all simultaneously present, thereby mimicking experimental setups. Using this setup, hydrate growth is studied here under the influence of two additives, a polyvinylcaprolactam oligomer and sodium dodecyl sulfate, at varying concentrations. Our results confirm that hydrate films grow along the oil-water interface, in general agreement with visual experimental observations; growth, albeit slower, also occurs at the hydrate-water interface, the interface most often interrogated via simulations. The results obtained demonstrate that the additives present within curved interfaces control the solubility of methane in the aqueous phase, which correlates with hydrate growth rate. Building on our simulation insights, we suggest that by combining data for the potential of mean force profile for methane transport across the oil-water interface and for the average free energy required to perturb a flat interface, it is possible to predict the performance of additives used to control hydrate growth. These insights could be helpful to achieve optimal methane storage in hydrates, one of many applications which are attracting significant fundamental and applied interests.
Collapse
Affiliation(s)
- Anh Phan
- School of Chemistry and Chemical Engineering, Faculty of Engineering and Physical Sciences, University of Surrey, Guildford, Surrey GU2 7XH, UK.
| | - Michail Stamatakis
- Department of Chemical Engineering, University College London, London WC1E 7JE, UK
| | - Carolyn A Koh
- Center for Hydrate Research, Chemical & Biological Engineering Department, Colorado School of Mines, Golden, CO 80401, United States
| | - Alberto Striolo
- Department of Chemical Engineering, University College London, London WC1E 7JE, UK; School of Chemical, Biological and Materials Engineering, University of Oklahoma, Norman, OK 73019, United States.
| |
Collapse
|
2
|
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.
Collapse
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
| |
Collapse
|
3
|
Almashwali A, Bavoh CB, Lal B, Khor SF, Jin QC, Zaini D. Gas Hydrate in Oil-Dominant Systems: A Review. ACS OMEGA 2022; 7:27021-27037. [PMID: 35967034 PMCID: PMC9366985 DOI: 10.1021/acsomega.2c02278] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Accepted: 07/14/2022] [Indexed: 05/04/2023]
Abstract
Gas hydrate risks minimization in deepsea hydrocarbon flowlines, especially in high water to oil ratios, and is critical for the oil and gas flow assurance industry. Although there are several reviews on gas hydrate mitigation in gas-dominated systems, limited reviews have been dedicated to the understanding and mechanism of hydrate formation and mitigation in oil-dominated systems. Hence, this review article discusses and summarizes the prior studies on the hydrate formation behavior and mitigation in oil-dominated multiphase systems. The factors (such as oil volume or water cut, bubble point, and hydrate formers) that affect hydrate formation in oil systems are also discussed in detail. Furthermore, insight into the hydrate mitigation and mechanism in oil systems is also presented in this review. Also, a detailed table on the various studied hydrate tests in oil systems, including the experimental methods, inhibitor type, conventions, and testing conditions, is provided in this work. The findings presented in this work are relevant for developing the best solution to manage hydrate formation in oil-dominated systems for the oil and gas industry.
Collapse
Affiliation(s)
- Abdulrab
Abdulwahab Almashwali
- Chemical
Engineering Department, Universiti Teknologi
PETRONAS, Bandar
Seri Iskandar, 32610 Perak Darul Ridzuan, Malaysia
- Research
Centre for CO2 Capture (RCCO2C), Universiti Teknologi PETRONAS, Bandar Seri Iskandar, 32610 Perak, Malaysia
| | - Cornelius B. Bavoh
- Chemical
Engineering Department, Universiti Teknologi
PETRONAS, Bandar
Seri Iskandar, 32610 Perak Darul Ridzuan, Malaysia
- Research
Centre for CO2 Capture (RCCO2C), Universiti Teknologi PETRONAS, Bandar Seri Iskandar, 32610 Perak, Malaysia
| | - Bhajan Lal
- Chemical
Engineering Department, Universiti Teknologi
PETRONAS, Bandar
Seri Iskandar, 32610 Perak Darul Ridzuan, Malaysia
- Research
Centre for CO2 Capture (RCCO2C), Universiti Teknologi PETRONAS, Bandar Seri Iskandar, 32610 Perak, Malaysia
- . Tel.: +6053687619
| | - Siak Foo Khor
- Chemical
Engineering Department, Universiti Teknologi
PETRONAS, Bandar
Seri Iskandar, 32610 Perak Darul Ridzuan, Malaysia
- PTTEP,
Petronas Twin Towers, Kuala Lumpur, 50450 Salangor, Malaysia
| | - Quah Chong Jin
- Numit
Enterprise, Seri Kembangan, 43300 Salongor, Malaysia
| | - Dzulkarnain Zaini
- Chemical
Engineering Department, Universiti Teknologi
PETRONAS, Bandar
Seri Iskandar, 32610 Perak Darul Ridzuan, Malaysia
| |
Collapse
|
4
|
An Integrated Experimental and Computational Platform to Explore Gas Hydrate Promotion, Inhibition, Rheology, and Mechanical Properties at McGill University: A Review. ENERGIES 2022. [DOI: 10.3390/en15155532] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
Abstract
(1) Background: Gas hydrates are historically notable due to their prevalence and influence on operational difficulties in the oil and gas industry. Recently, new technologies involving the formation of gas hydrates to accomplish various applications have been proposed. This has created new motivation for the characterization of rheological and mechanical properties and the study of molecular phenomena in gas hydrates systems, particularly in the absence of oil and under pre-nucleation conditions. (2) Methodology: This work reviews advances in research on the promotion, inhibition, rheology, and mechanical properties of gas hydrates obtained through an integrated material synthesis-property characterization-multi-scale theoretical and computational platform at McGill University. (3) Discussion: This work highlights the findings from previous experimental work by our group and identifies some of their inherent physical limitations. The role of computational research methods in extending experimental results and observations in the context of mechanical properties of gas hydrates is presented. (4) Summary and Future perspective: Experimental limitations due to the length and time scales of physical phenomena associated with gas hydrates were identified, and future steps implementing the integrated experimental-computational platform to address the limitations presented here were outlined.
Collapse
|
5
|
Methane Hydrate Behavior for Water–Oil Systems Containing CTAB and Synperonic PE/F127 Surfactants. ENERGIES 2022. [DOI: 10.3390/en15145213] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Methane hydrates were studied in systems containing aqueous dissolved surfactants in oil emulsions with a volume ratio of 40/60. Two commercial surfactants, named synperonic PE/F127 and cetyltrimethylammonium bromide, were evaluated at 0, 350, 700 and 1500 ppm. Experiments were made by applying the cooling–heating path in an isochoric high-pressure cell at different initial pressures of 5.5, 8.0, 10.0 and 12.0 MPa. The obtained parameters were induction time, temperature onset, pressure drop, and dissociation conditions. The results revealed that the dissociation curve for methane in water-in-oil emulsions was not modified by the surfactants. The crystallization (onset) temperature was higher using synperonic PE/F127 in comparison with zero composition, while the opposite occurred with cetyltrimethylammonium bromide. Both surfactants induced a delaying effect on the induction time and a lesser pressure drop.
Collapse
|
6
|
Liu Y, Wu C, Lv X, Xu X, Ma Q, Meng J, Zhou S, Shi B, Song S, Gong J. Evolution of morphology and cohesive force of hydrate particles in the presence/absence of wax. RSC Adv 2022; 12:14456-14466. [PMID: 35702235 PMCID: PMC9096918 DOI: 10.1039/d2ra02266d] [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: 04/07/2022] [Accepted: 05/06/2022] [Indexed: 01/10/2023] Open
Abstract
In the exploitation of deep-sea oil and gas resources, the multiphase production and transportation process is frequently plagued by pipeline blockage issues. Especially when hydrates and wax coexist simultaneously, the viscosity and plugging tendency of multiphase flow systems will synergistically increase. Understanding the evolution of morphology of hydrate particles and the agglomeration characteristics of hydrate particles in the presence or absence of wax crystals is crucial to flow assurance industry. With the assistance of a visualized reactor equipped with a three axis moving platform, microscopic images of cyclopentane hydrate during hydrate growth were obtained, and the cohesive force between hydrate particles was measured. It was found that during the hydrate growth on wax-free water droplets, the untransformed water inside the particles gradually wetted the surface of the particle. With the increase in temperature and contact time, the shell of hydrate particles changed from solid and rough to smooth and moist. The cohesive force measured in this work ranges from 3.14 ± 0.52 to 11.77 ± 0.68 mN m−1 with different contact times and temperature. When the contact time was 0 s and 10 s, the cohesive force between particles increased first and then stabilized with temperature. When the contact time was 20 s, the cohesive force was greater than the first two cases and showed an overall stable trend. An interesting phenomenon was also discerned: a large water bridge between particles formed during their separation process. For the wax-containing system, it required a longer time for water droplets to be converted into hydrate particles than that for wax-free systems. After wax participated in hydrate growth, hydrate particles showed the properties of elasticity and stickiness, which resulted in a larger liquid bridge between hydrate particles after their contact. It was suggested that wax crystal would alter the shell structure of hydrate particles, and change the surface properties of hydrate particles and the formation process of the liquid bridge, leading to significant and rapid increase in the cohesive force. In the exploitation of deep-sea oil and gas resources, the multiphase production and transportation process is frequently plagued by pipeline blockage issues.![]()
Collapse
Affiliation(s)
- Yang Liu
- Jiangsu Key Laboratory of Oil and Gas Storage and Transportation Technology, Changzhou University Changzhou Jiangsu 213164 China
| | - Chengxuan Wu
- Jiangsu Key Laboratory of Oil and Gas Storage and Transportation Technology, Changzhou University Changzhou Jiangsu 213164 China
| | - Xiaofang Lv
- Jiangsu Key Laboratory of Oil and Gas Storage and Transportation Technology, Changzhou University Changzhou Jiangsu 213164 China .,Institute of Petroleum Engineering Technology, Sinopec Northwest Oil Field Company Urumqi Xinjiang 830011 China
| | - Xinyi Xu
- Jiangsu Key Laboratory of Oil and Gas Storage and Transportation Technology, Changzhou University Changzhou Jiangsu 213164 China
| | - Qianli Ma
- Jiangsu Key Laboratory of Oil and Gas Storage and Transportation Technology, Changzhou University Changzhou Jiangsu 213164 China
| | - Jiawei Meng
- Jiangsu Key Laboratory of Oil and Gas Storage and Transportation Technology, Changzhou University Changzhou Jiangsu 213164 China
| | - Shidong Zhou
- Jiangsu Key Laboratory of Oil and Gas Storage and Transportation Technology, Changzhou University Changzhou Jiangsu 213164 China
| | - Bohui Shi
- National Engineering Laboratory for Pipeline Safety/State Key Laboratory of Natural Gas Hydrate, China University of Petroleum-Beijing Beijing 102249 China
| | - Shangfei Song
- National Engineering Laboratory for Pipeline Safety/State Key Laboratory of Natural Gas Hydrate, China University of Petroleum-Beijing Beijing 102249 China
| | - Jing Gong
- National Engineering Laboratory for Pipeline Safety/State Key Laboratory of Natural Gas Hydrate, China University of Petroleum-Beijing Beijing 102249 China
| |
Collapse
|
7
|
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.
Collapse
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
| |
Collapse
|