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Yao Lu,Zhe Li,Gebremariam Hailu,Derong Xu,Hairong Wu,Wanli Kang 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.72 No.-
The existing downhole oil–water separation (DOWS) technology has disadvantages in terms ofseparation efficiency, cost, complexity, etc. The novelfiltration separation technology using metalmeshes has been investigated and it displays the potential to increase DOWS efficiency. In current study, asuper-hydrophobic copper mesh was fabricated by a simple dip-coating method and then characterized. Focusing on the application in DOWS technology, the separation of the mesh materials in the liftingprocess of produced liquid from the wellbore was simulated and investigated by a designed indoor devicefor thefirst time. The results show that the highly hydrophobic copper mesh with water contact angle of153 can be obtained by oxidizing 40 min, followed by immersing in a 50 g L 1 stearic acid solution for25 min. The mesh can keep super-hydrophobicity and high separation stability after treatment at 100 Cor in the pH range of 5–7, while the separation efficiency is susceptible to the oil viscosity and the claycontents of the producedfluids. The super-hydrophobic copper mesh can be a promising candidate forDOWS in moderate condition. The inherent separation mechanism was further discussed by the variationof wettability and surface structure in microscopic scale.
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