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Functionalized Magnetic Carbon Nanoparticles Efficiently Break Water-in-Heavy Oil Emulsions
Jinlong Gao1, Lulu Yan2, Jun Ma2
1College of Energy and Chemical Engineering, Shaanxi Polytechnic University, Xianyang 712000, China.
Polyethyleneimine-modified magnetic carbon nanoparticles (P-MCNs) effectively break water-in-heavy oil emulsions. This green demulsification approach enhances water removal efficiency in the petroleum industry.
Area of Science:
- Materials Science
- Chemical Engineering
- Petroleum Engineering
Background:
- Efficient demulsification of water-in-heavy oil (W/HO) emulsions is crucial for the petroleum industry.
- Existing green demulsification materials, like magnetic carbon nanoparticles, show limited efficiency for W/HO emulsions.
Purpose of the Study:
- To develop and evaluate polyethyleneimine-modified magnetic carbon nanoparticles (P-MCNs) for enhanced demulsification of W/HO emulsions.
- To investigate the mechanism behind the improved demulsification performance of P-MCNs.
Main Methods:
- Surface functionalization of magnetic carbon nanoparticles with polyethyleneimine.
- Evaluation of demulsification performance using the standard bottle test at 50 °C.
- Microscopic visualization to characterize interfacial activity and demulsification mechanisms.
Main Results:
- P-MCNs achieved effective water removal (500 ppm) from W/HO emulsions within 60 minutes at 50 °C.
- High interfacial activity of P-MCNs was observed, facilitating rapid migration to the oil-water interface.
- Demulsification is attributed to the disruption of interfacial films via electrostatic interactions and hydrogen bonding.
Conclusions:
- Polyethyleneimine modification significantly enhances the demulsification efficiency of magnetic carbon nanoparticles for W/HO emulsions.
- P-MCNs offer a promising green solution for improving water removal in the heavy oil industry.
- This study lays the groundwork for developing advanced magnetic carbon nanomaterials for petroleum applications.
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