Pore wettability for enhanced oil recovery, contaminant adsorption and oil/water separation: A review

Ding, Fan; Gao, Manglai

doi:10.1016/j.cis.2021.102377

Cited by 126 publications

(53 citation statements)

References 215 publications

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“…Due to increasingly serious water pollution caused by discharge of industrial wastewater with oil or oil spill accidents, more and more attention has been focused on oil-water separation. [1][2][3][4][5][6][7][8][9][10][11][12][13] In particular, gravity-assisted oil-water separation has a high application value. [14][15][16][17][18][19][20] The key to gravity-assisted oil-water separation is the selection of filtration media exhibiting extreme wettability.…”

Section: Introductionmentioning

confidence: 99%

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Preparation of porous PTFE/C composite foam and its application in gravity‐driven oil–water separation

Guo

Yao

Zhu

et al. 2022

Polymer International

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Porous superhydrophobic filtration media with durable performance that can be used in harsh environments remain an urgent requirement. Here, we designed and prepared a porous polytetrafluoroethylene (PTFE)/C composite foam derived from PTFE/glutaraldehyde‐crosslinked poly(vinyl formal) foam via a method of low‐temperature in situ carbonization by the combination of sintering in nitrogen atmosphere and oxygen atmosphere. The as‐prepared porous PTFE/C composite foam had an interconnected macropore structure and wettability of superhydrophobicity. Meanwhile, the porous skeleton of the PTFE/C composite foam showed a skin–core microstructure with the functional skin layer of PTFE continuous phase and the support core of PTFE and carbon in situ composite phase. The PTFE functional layer was anchored to the support composite layer in a root‐like branching, which endows the porous PTFE/C composite foam with an extremely durable performance. In gravity‐driven oil–water separation, the porous PTFE/C composite foam achieved considerable oil flux (from 27 174 to 73 242 L h−1 m−2) and purity (as high as 99.83 wt%). Meanwhile, the porous PTFE/C composite foam presented resistance to strong acids, strong alkalis, chemical solvents and friction. Even after it had been mechanically damaged, the superhydrophobic properties of the foam were not degraded. The as‐prepared porous PTFE/C composite foam showed great potential in all kinds of harsh environments. © 2021 Society of Industrial Chemistry.

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Section: Introductionmentioning

confidence: 99%

“…Due to increasingly serious water pollution caused by discharge of industrial wastewater with oil or oil spill accidents, more and more attention has been focused on oil–water separation 1–13 . In particular, gravity‐assisted oil–water separation has a high application value 14–20 .…”

Section: Introductionmentioning

confidence: 99%

Preparation of porous PTFE/C composite foam and its application in gravity‐driven oil–water separation

Guo

Yao

Zhu

et al. 2022

Polymer International

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“…Through simulation calculations based on density functional theory (DFT) [26][27][28] and MD [29][30][31], we studied the adsorption mechanism of RM for phosphate removal from phosphorus-containing wastewater. Both wettability [32][33][34] and adsorption energy [35][36][37] provide strong evidence to explain adsorption. This study established the crystal structure of cancrinite and built a sodium dodecylbenzene sulfonate (SDBS) wetting layer on its surface.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of phosphate by cancrinite in red mud: a first-principles study

Zhou

Qiu

et al. 2022

Mater. Res. Express

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Cancrinite is the key substance that affects the adsorption effect of phosphate from red mud(RM) . Therefore, cancrinite in RM was modified to improve its adsorption performance. Based on density functional theory(DTF), this paper optimized the structure of cancrinite, the main component of red mud, modified the cancrinite with sodium dodecyl benzene sulfonate, and studied the surface wettability changes of cancrinite before and after modification through dynamics relaxation. The effects of wetting modification on the adsorption properties of cancrinite were studied by molecular dynamics simulation of radial distribution function, adsorption site , adsorption energy and mean square displacement. Research shows that modified cancrinite Surface wettability increased by 77%, also has more adsorption sites, adsorption energy is smaller, diffusion process is accelerated, so the adsorption capacity is stronger. This study lays a theoretical foundation for enhancing the adsorption of phosphate from wastewater by RM.

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“…Furthermore, there is no research on the effect of nanofluids and surfactants in enhanced oil recovery by the hot-water-based method (HWBE) because this process has mostly been used for sandstone asphalt rocks. Last but not least, details regarding the effect of nanofluids on mineral surface wettability are unclear [ 22 , 23 , 24 ], as in most reports, wettability has only been studied through contact angle, and elemental and morphological analyses are lacking, which are required for establishing a detailed mechanism.…”

Section: Introductionmentioning

confidence: 99%

Synergistic Effect of Nanofluids and Surfactants on Heavy Oil Recovery and Oil-Wet Calcite Wettability

Hou

Sun

2021

Nanomaterials

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In recent years, unconventional oils have shown a huge potential for exploitation. Abundant reserves of carbonate asphalt rocks with a high oil content have been found; however, heavy oil and carbonate minerals have a high interaction force, which makes oil-solid separation difficult when using traditional methods. Although previous studies have used nanofluids or surfactant alone to enhance oil recovery, the minerals were sandstones. For carbonate asphalt rocks, there is little research on the synergistic effect of nanofluids and surfactants on heavy oil recovery by hot-water-based extraction. In this study, we used nanofluids and surfactants to enhance oil recovery from carbonate asphalt rocks synergistically based on the HWBE process. In order to explore the synergistic mechanism, the alterations of wettability due to the use of nanofluids and surfactants were studied. Nanofluids alone could render the oil-wet calcite surface hydrophilic, and the resulting increase in hydrophilicity of calcite surfaces treated with different nanofluids followed the order of SiO2 > MgO > TiO2 > ZrO2 > γ-Al2O3. The concentration, salinity, and temperature of nanofluids influenced the oil-wet calcite wettability, and for SiO2 nanofluids, the optimal nanofluid concentration was 0.2 wt%; the optimal salinity was 3 wt%; and the contact angle decreased as the temperature increased. Furthermore, the use of surfactants alone made the oil-wet calcite surface more hydrophilic, according to the following order: sophorolipid (45.9°) > CTAB (49°) > rhamnolipid (53.4°) > TX-100 (58.4°) > SDS (67.5°). The elemental analysis along with AFM and SEM characterization showed that nanoparticles were adsorbed onto the mineral surface, resulting in greater hydrophilicity of the oil-wet calcite surface, and the roughness was related to the wettability. Surfactant molecules could aid in the release of heavy oil from the calcite surface, which exposes the uncovered calcite surface to its surroundings; additionally, some surfactants adsorbed onto the oil-wet calcite surface, and the combined role made the oil-wet calcite surface hydrophilic. In conclusion, the study showed that hybrid nanofluids showed a better effect on wettability alteration, and the use of nanofluids and surfactants together resulted in synergistic alteration of oil-wet calcite surface wettability.

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Pore wettability for enhanced oil recovery, contaminant adsorption and oil/water separation: A review

Cited by 126 publications

References 215 publications

Preparation of porous PTFE/C composite foam and its application in gravity‐driven oil–water separation

Preparation of porous PTFE/C composite foam and its application in gravity‐driven oil–water separation

Adsorption of phosphate by cancrinite in red mud: a first-principles study

Synergistic Effect of Nanofluids and Surfactants on Heavy Oil Recovery and Oil-Wet Calcite Wettability

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