Journal
FUEL
Volume 282, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.fuel.2020.118603
Keywords
MWCNT-Fe3O4 nanohybrid; Surface modification; Electromagnetic heating; Microwave absorption; Stability; Microfluidic enhanced oil recovery
Categories
Funding
- Tarbiat Modares University
- National Iranian Oil Company (NIOC)
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This study investigated the effect of different surface modifications on the microwave absorption performance of new synthesized MWCNT-Fe3O4 nanohybrid. MWCNT-Fe3O4 nanohybrids were synthesized via a co-precipitation method. For the dispersion of these nanomaterials into the water (as the injected fluid), the surfaces of them were modified. For this purpose, three different materials included 3-AminoPropylTriEthoxySilane (APTES), citric acid (CA), and polyethylene glycol (PEG 6000) were used as the surface modification agents. The nanoparticles were characterized by Fourier transform infrared spectroscopy (FTIR), X-ray crystallography (XRD), vibrating sample magnetometer (VSM), and field emission scanning electron microscopy (FESEM). Stability of the coated nanomaterials in distilled water studied by zeta potential analysis and qualitative deposition of particles over time. Microwave absorption of coated nanomaterials investigated by determining the temperature rises of solution (oil and water) containing nanoparticles. The results showed that modification of nanohybrid particles by citric acid had a significant impact on the no sediment condition of them in distilled water in comparison with APTES and PEG 6000. All of the coated nanoparticles were superparamagnetic and citric acid, APTES and PEG had minimum effects on the magnetic properties of uncoated nanoparticles, respectively. Also, by adding only 0.1 wt% of MWCNT-Fe3O4 nanohybrid modified with citric acid, the solution temperature rises significantly. Therefore, after 180 s of microwave radiation, the water-based solution temperature would increase about 11 degrees C more than the deionized water. Finally, it was found that, by using 400 W microwave radiation, the microfluidic oil recovery increased 24.9%, 30.3%, and 43.9% in comparison with water, Fe3O4 @ CA, and Fe3O4-MWCNT @ CA injection without microwave radiation, respectively.
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