1
|
Liang C, Liu X, Jiang H, Xu Y, Jia Y. Dissipative Particle Dynamics-Based Simulation of the Effect of Asphaltene Structure on Oil-Water Interface Properties. ACS OMEGA 2023; 8:33083-33097. [PMID: 37720765 PMCID: PMC10501109 DOI: 10.1021/acsomega.3c05486] [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: 07/27/2023] [Accepted: 08/14/2023] [Indexed: 09/19/2023]
Abstract
Asphaltenes are the main substances that stabilize emulsions during the production, processing, and transport of crude oil. The purpose of this research is to investigate the process of asphaltenes forming interfacial films at the oil-water interface by means of dissipative particle dynamics (DPD) and the effect of asphaltenes of different structures on the oil-water interface during the formation of interfacial film. It is demonstrated that the thickness of the interfacial film formed at the oil-water interface gradually increases as the asphaltene concentration rises and the amount of asphaltene adsorbed at the oil-water interface gradually multiplies. Both the number and type of heteroatoms in asphaltenes affect the interfacial behavior of asphaltenes. The interface activity of asphaltenes can be enhanced by increasing the number of heteroatoms in the asphaltene, and the type of heteroatom affects as well the interfacial activity of the asphaltene as it affects the aggregation behavior of the asphaltene in the system. As the number of asphaltene aromatic rings increases, the oil-water interfacial tension (IFT) trends down gradually, while the effect of alkyl side chains on the reduction of IFT of asphaltenes is different, and asphaltenes with medium length alkyl side chains can reduce IFT more efficiently.
Collapse
Affiliation(s)
- Chonghao Liang
- School
of Mechanical Science and Engineering, Northeast
Petroleum University, Daqing 163318, China
| | - Xiaoyan Liu
- School
of Mechanical Science and Engineering, Northeast
Petroleum University, Daqing 163318, China
| | - Hui Jiang
- School
of Civil Architecture and Engineering, Northeast
Petroleum University, Daqing 163318, China
| | - Ying Xu
- School
of Mechanical Science and Engineering, Northeast
Petroleum University, Daqing 163318, China
| | - Yongying Jia
- School
of Mechanical Science and Engineering, Northeast
Petroleum University, Daqing 163318, China
| |
Collapse
|
2
|
Ma J, Yao M, Yang Y, Zhang X. Comprehensive review on stability and demulsification of unconventional heavy oil-water emulsions. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.118510] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
|
3
|
Ning Y, Li Y, Song G, Wang W, Liu X, Liu Z, Zhang J. Investigation on Hydrate Formation and Growth Characteristics in Dissolved Asphaltene-Containing Water-In-Oil Emulsion. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:11072-11083. [PMID: 34514801 DOI: 10.1021/acs.langmuir.1c01698] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Clarifying the effect of asphaltene on hydrate formation and growth is of great significance to the operation safety in deepwater petroleum fields. To investigate the influence of low-concentration dissolved asphaltenes on the formation kinetics and growth process of hydrates in water-in-oil emulsions, experiments with asphaltene concentrations ranging from 50 to 1000 ppm were carried out using a high-pressure visual reactor. At a low concentration, the adsorption of asphaltene monomers on the oil-water interface or nanoaggregates in the bulk barely affected the nucleation of hydrate and the induction time of hydrate formation. However, it would hinder the microscopic mass transfer process and heat transfer process between gas molecules and then mitigate the initial rate of hydrate formation. Therefore, the dissolved asphaltenes could not be used as antiagglomerants (AAs) to efficiently inhibit the aggregation of hydrate particles at low concentrations under our experimental conditions, causing extensive hydrate agglomeration and deposition in the reactor.
Collapse
Affiliation(s)
- Yuanxing Ning
- Shandong Key Laboratory of Oil-Gas Storage and Transportation Safety, China University of Petroleum, Qingdao 266580, Shandong, P. R. China
- College of Pipeline and Civil Engineering, China University of Petroleum, Qingdao 266580, Shandong, P. R. China
| | - Yuxing Li
- Shandong Key Laboratory of Oil-Gas Storage and Transportation Safety, China University of Petroleum, Qingdao 266580, Shandong, P. R. China
- College of Pipeline and Civil Engineering, China University of Petroleum, Qingdao 266580, Shandong, P. R. China
| | - Guangchun Song
- Shandong Key Laboratory of Oil-Gas Storage and Transportation Safety, China University of Petroleum, Qingdao 266580, Shandong, P. R. China
- College of Pipeline and Civil Engineering, China University of Petroleum, Qingdao 266580, Shandong, P. R. China
| | - Wuchang Wang
- Shandong Key Laboratory of Oil-Gas Storage and Transportation Safety, China University of Petroleum, Qingdao 266580, Shandong, P. R. China
- College of Pipeline and Civil Engineering, China University of Petroleum, Qingdao 266580, Shandong, P. R. China
| | - Xiang Liu
- Shandong Key Laboratory of Oil-Gas Storage and Transportation Safety, China University of Petroleum, Qingdao 266580, Shandong, P. R. China
- College of Pipeline and Civil Engineering, China University of Petroleum, Qingdao 266580, Shandong, P. R. China
| | - Zhiming Liu
- Shandong Key Laboratory of Oil-Gas Storage and Transportation Safety, China University of Petroleum, Qingdao 266580, Shandong, P. R. China
- College of Pipeline and Civil Engineering, China University of Petroleum, Qingdao 266580, Shandong, P. R. China
| | - Jialu Zhang
- Shandong Key Laboratory of Oil-Gas Storage and Transportation Safety, China University of Petroleum, Qingdao 266580, Shandong, P. R. China
- College of Pipeline and Civil Engineering, China University of Petroleum, Qingdao 266580, Shandong, P. R. China
| |
Collapse
|
4
|
Song G, Ning Y, Guo P, Li Y, Wang W. Investigation on Hydrate Growth at the Oil-Water Interface: In the Presence of Wax and Surfactant. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:6838-6845. [PMID: 34036780 DOI: 10.1021/acs.langmuir.1c01060] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Natural gas hydrates can readily form in deep-water-oil production processes and pose a great threat to subsea pipeline flow assurance. The usage of surfactants and hydrate antiagglomerants is a common strategy to prevent hydrate hazards. In water/wax-containing oil systems, hydrate coexisting with wax could lead to more complex and risky transportation conditions. Moreover, the effectiveness of surfactants and hydrate antiagglomerants in the presence of wax should be further evaluated. In this work, for the purpose of investigating how wax and surfactants could affect hydrate growth at the oil-water interface, a series of microexperiments was conducted in an atmospheric visual cell where the nucleation and growth of hydrates took place on a water droplet surrounded by wax-containing oils. On the basis of the experimental phenomena observed using a microscope, the formation of a hydrate shell by lateral growth, the collapse of a water droplet after hydrate initial formation, and the formation of hollow-conical hydrate crystals were identified. These experimental phenomena were closely related to the concentration of wax and surfactant used in each case. In addition, it was shown that the effectiveness of the surfactant could be weakened by wax molecules. Moreover, there existed a critical wax content above which the effectiveness of the surfactant was greatly reduced and the critical wax content gradually increased with increasing surfactant concentration. This work could provide guidance for hydrate management in wax-containing systems.
Collapse
Affiliation(s)
- Guangchun Song
- Shandong Key Laboratory of Oil-Gas Storage and Transportation Safety, China University of Petroleum, Qingdao, 266580 Shandong, China
- College of Pipeline and Civil Engineering, China University of Petroleum, Qingdao, 266580 Shandong, China
| | - Yuanxing Ning
- Shandong Key Laboratory of Oil-Gas Storage and Transportation Safety, China University of Petroleum, Qingdao, 266580 Shandong, China
- College of Pipeline and Civil Engineering, China University of Petroleum, Qingdao, 266580 Shandong, China
| | - Penghao Guo
- Shandong Key Laboratory of Oil-Gas Storage and Transportation Safety, China University of Petroleum, Qingdao, 266580 Shandong, China
- College of Pipeline and Civil Engineering, China University of Petroleum, Qingdao, 266580 Shandong, China
| | - Yuxing Li
- Shandong Key Laboratory of Oil-Gas Storage and Transportation Safety, China University of Petroleum, Qingdao, 266580 Shandong, China
- College of Pipeline and Civil Engineering, China University of Petroleum, Qingdao, 266580 Shandong, China
| | - Wuchang Wang
- Shandong Key Laboratory of Oil-Gas Storage and Transportation Safety, China University of Petroleum, Qingdao, 266580 Shandong, China
- College of Pipeline and Civil Engineering, China University of Petroleum, Qingdao, 266580 Shandong, China
| |
Collapse
|