| Autor: |
Xinrong Wang, Xincheng Cui, Dongxing Du, Shuo Yuan, Fei Wang, Bin Ding, Xiangfei Geng |
| Rok vydání: |
2021 |
| Předmět: |
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| Zdroj: |
Colloids and Surfaces A: Physicochemical and Engineering Aspects. 629:127463 |
| ISSN: |
0927-7757 |
| DOI: |
10.1016/j.colsurfa.2021.127463 |
| Popis: |
In correspondence to the bright prospects of CO2 EOR technology on greenhouse gas geological storage as well as oil recovery enhancement practices, the phase equilibrium characteristics of CO2/oil/water system was investigated in this paper. n-Hexadecane (n-C16H34) is employed as the oil component and water is introduced into the two phase system as the dissolved component in CO2. PR-EOS with modified alpha functions and Binary Interaction Parameters (BIPs) is employed to calculate the Minimum Miscibility Pressure (MMPs) of the CO2/n-C16H34 system with or without water presence at three temperatures of 40.3 ℃, 55.4 ℃ and 70 ℃. Calculation model and the employed parameters were validated through comparison with corresponding measurements, including the observation on decreased MMPs of the CO2/H2O/n-C16H34 system in comparison with the CO2/n-C16H34 system. Parameter studies were carried out for the CO2/n-C16H34 system with or without water presence at different molar ratios. It is found the existence of water component could reduce the MMP values of the CO2/n-C16H34 system and the degree of the MMP reduction was related to the molar ratio of CO2 in the system. Higher CO2 molar ratio could result in larger MMP deviation between CO2/C16H34 system and CO2/H2O/C16H34 system. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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