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Synthesis and application of hydrophilically-modified Fe(3)O(4) nanoparticles in oil sands separation
Nanoparticles have been reported to be a promising candidate for the separation of heavy oil from its host rock's surface. These nanoparticles (NPs) are often dispersed and stabilized in the solution by some surfactants during the unconventional oil ores processing. Herein, the PEG600–KH560 (PK...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Royal Society of Chemistry
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9080067/ https://www.ncbi.nlm.nih.gov/pubmed/35539488 http://dx.doi.org/10.1039/c8ra01966e |
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author | Zhang, Zisheng Li, Hongda Sui, Hong He, Lin Li, Xingang |
author_facet | Zhang, Zisheng Li, Hongda Sui, Hong He, Lin Li, Xingang |
author_sort | Zhang, Zisheng |
collection | PubMed |
description | Nanoparticles have been reported to be a promising candidate for the separation of heavy oil from its host rock's surface. These nanoparticles (NPs) are often dispersed and stabilized in the solution by some surfactants during the unconventional oil ores processing. Herein, the PEG600–KH560 (PK) has been grafted onto Fe(3)O(4) NP surfaces, obtaining a kind of hydrophilically-modified recyclable nanoparticle. Results show that these NPs (averaged at around 16 nm for single sphere) could be well dispersed in water (no settling in 72 h), forming PK-Fe(3)O(4) nanofluids (NFs) at 0.2 wt%. These PK-Fe(3)O(4) NFs are found to be able to be quickly separated from the dispersions by an external magnetic field, and returning back to stable NFs when the magnetic field disappears and by shaking. The PK-Fe(3)O(4) NFs have been further used for the enhancement of heavy oil recovery from oil sands. The floatation results show that the PK-Fe(3)O(4) NFs could improve oil recovery by at least 12% compared with the traditional hot water extraction process (HWEP). After the extraction, up to 70% of the PK-Fe(3)O(4) NPs could be directly recycled from the solution for further use. The rest of the NPs are left in the oil phase and attached on the residual solid surface. However, the efficiency of the PK-Fe(3)O(4) NPs is found to be decreased when the recycling times exceed 5 due to the adsorption of oil components. A mechanistic study shows that the hydrophilic PK-Fe(3)O(4) NPs could be adsorbed on the mineral surface, making the surface more hydrophilic. The hydrophilic surface and the agitation disturbance helps the liberation process of bitumen from the solid surfaces. On the other hand, when adding the PK-Fe(3)O(4) NPs into the heavy oil–water system, the oil–water interface is found to be highly modified by the NPs, resulting in significant reduction of the oil–water interfacial tension. The above findings suggest that the PK-Fe(3)O(4) NPs combined the surface-active role (surfactant) and the nano-size role (adsorption) together, which facilitates its role in oil sands separation. |
format | Online Article Text |
id | pubmed-9080067 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | The Royal Society of Chemistry |
record_format | MEDLINE/PubMed |
spelling | pubmed-90800672022-05-09 Synthesis and application of hydrophilically-modified Fe(3)O(4) nanoparticles in oil sands separation Zhang, Zisheng Li, Hongda Sui, Hong He, Lin Li, Xingang RSC Adv Chemistry Nanoparticles have been reported to be a promising candidate for the separation of heavy oil from its host rock's surface. These nanoparticles (NPs) are often dispersed and stabilized in the solution by some surfactants during the unconventional oil ores processing. Herein, the PEG600–KH560 (PK) has been grafted onto Fe(3)O(4) NP surfaces, obtaining a kind of hydrophilically-modified recyclable nanoparticle. Results show that these NPs (averaged at around 16 nm for single sphere) could be well dispersed in water (no settling in 72 h), forming PK-Fe(3)O(4) nanofluids (NFs) at 0.2 wt%. These PK-Fe(3)O(4) NFs are found to be able to be quickly separated from the dispersions by an external magnetic field, and returning back to stable NFs when the magnetic field disappears and by shaking. The PK-Fe(3)O(4) NFs have been further used for the enhancement of heavy oil recovery from oil sands. The floatation results show that the PK-Fe(3)O(4) NFs could improve oil recovery by at least 12% compared with the traditional hot water extraction process (HWEP). After the extraction, up to 70% of the PK-Fe(3)O(4) NPs could be directly recycled from the solution for further use. The rest of the NPs are left in the oil phase and attached on the residual solid surface. However, the efficiency of the PK-Fe(3)O(4) NPs is found to be decreased when the recycling times exceed 5 due to the adsorption of oil components. A mechanistic study shows that the hydrophilic PK-Fe(3)O(4) NPs could be adsorbed on the mineral surface, making the surface more hydrophilic. The hydrophilic surface and the agitation disturbance helps the liberation process of bitumen from the solid surfaces. On the other hand, when adding the PK-Fe(3)O(4) NPs into the heavy oil–water system, the oil–water interface is found to be highly modified by the NPs, resulting in significant reduction of the oil–water interfacial tension. The above findings suggest that the PK-Fe(3)O(4) NPs combined the surface-active role (surfactant) and the nano-size role (adsorption) together, which facilitates its role in oil sands separation. The Royal Society of Chemistry 2018-04-26 /pmc/articles/PMC9080067/ /pubmed/35539488 http://dx.doi.org/10.1039/c8ra01966e Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/ |
spellingShingle | Chemistry Zhang, Zisheng Li, Hongda Sui, Hong He, Lin Li, Xingang Synthesis and application of hydrophilically-modified Fe(3)O(4) nanoparticles in oil sands separation |
title | Synthesis and application of hydrophilically-modified Fe(3)O(4) nanoparticles in oil sands separation |
title_full | Synthesis and application of hydrophilically-modified Fe(3)O(4) nanoparticles in oil sands separation |
title_fullStr | Synthesis and application of hydrophilically-modified Fe(3)O(4) nanoparticles in oil sands separation |
title_full_unstemmed | Synthesis and application of hydrophilically-modified Fe(3)O(4) nanoparticles in oil sands separation |
title_short | Synthesis and application of hydrophilically-modified Fe(3)O(4) nanoparticles in oil sands separation |
title_sort | synthesis and application of hydrophilically-modified fe(3)o(4) nanoparticles in oil sands separation |
topic | Chemistry |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9080067/ https://www.ncbi.nlm.nih.gov/pubmed/35539488 http://dx.doi.org/10.1039/c8ra01966e |
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