Next Article in Journal
Inter-Criteria Dependencies-Based Decision Support in the Sustainable wind Energy Management
Previous Article in Journal
Experimental Study of Particle Deposition on Surface at Different Mainstream Velocity and Temperature
Open AccessArticle

Effect of Salts on Interfacial Tension and CO2 Mass Transfer in Carbonated Water Injection

Department of Petroleum Technology, University of Stavanger, Stavanger 4035, Norway
*
Author to whom correspondence should be addressed.
Energies 2019, 12(4), 748; https://doi.org/10.3390/en12040748
Received: 1 February 2019 / Revised: 16 February 2019 / Accepted: 22 February 2019 / Published: 24 February 2019
Carbonated water injection (CWI) is a promising enhanced oil recovery (EOR) and CO2 sequestration method, which overcomes the problems associated with CO2 EOR. CO2 mass transfer and interfacial tension (IFT) are important parameters that influence oil recovery efficiency. This study addresses the impact of MgCl2 and Na2SO4 in carbonated water (CW) on CW/hydrocarbon IFT and CO2 mass transfer. An axisymmetric drop shape analysis was used to estimate the IFT and the CO2 diffusion coefficient. It was found that CW+MgCl2 reduced both the CW/n-decane IFT (36.5%) and CO2 mass transfer, while CW+Na2SO4 increased both the IFT and CO2 mass transfer (57%). It is suggested that reduction in IFT for CW+MgCl2 brine is mainly due to the higher hydration energy of Mg2+. The Mg2+ ion forms a tight bond to the first hydration shell [Mg(H2O)6]2+, this increases the effective size at the interface, hence reduce IFT. Meanwhile, the SO42− outer hydration shell has free OH groups, which may locally promote CO2 mass transfer. The study illustrates the potential of combining salts and CW in enhancing CO2 mass transfer that can be the base for further investigations. Furthermore, the contribution and proposed mechanisms of the different ions (SO42− and Mg2+) to the physical process in carbonated water/hydrocarbon have been addressed, which forms one of primary bases of EOR. View Full-Text
Keywords: CO2+brine; interfacial tension; carbonated water; CO2 diffusion coefficient; synthetic sea water CO2+brine; interfacial tension; carbonated water; CO2 diffusion coefficient; synthetic sea water
Show Figures

Figure 1

MDPI and ACS Style

Hamouda, A.A.; Bagalkot, N. Effect of Salts on Interfacial Tension and CO2 Mass Transfer in Carbonated Water Injection. Energies 2019, 12, 748.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop