Jesana M. Loreto, Emilia Annese, L. G. Pedroni, Fernando Stavale
{"title":"预湿方解石中的除油:用傅里叶变换红外和x射线光电子能谱研究活性与非活性离子","authors":"Jesana M. Loreto, Emilia Annese, L. G. Pedroni, Fernando Stavale","doi":"10.1021/acs.langmuir.5c00286","DOIUrl":null,"url":null,"abstract":"In presalt reservoirs, natural rocks interact simultaneously with formation water (FW) and mineral oil. The prehydrated calcites with FW and demineralized water (DW) are suitable model systems to investigate oil adsorption (removal) on (from) their surfaces by Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy. Preliminary characterization of the chemical composition of fresh cleaved calcite conditioned directly with low salinity (LS) waters, FW, and DW indicates that calcite undergoes (i) surface dissolution once in contact with DW and diluted LS water (LS100) as testified by the split of ν<sub>3</sub> vibration bands of the CO<sub>3</sub><sup>2–</sup> group and (ii) partial chemical modification of calcite e through Mg incorporation, water anchoring at the surface, and salt deposit formation at the calcite/FW interface. Pristine and (FW, DW) prewet calcites were conditioned with Nujol, and an overall larger CH<sub>2</sub> and CH<sub>3</sub> vibration band intensity of Nujol was observed on the FW prehydrated surface than calcite/DW/oil and calcite/oil interfaces. The final conditioning of calcite/oil, calcite/FW/oil, and calcite/DW/oil with LS water ended up with greater oil removal for a saline solution of 0.2 mol/L ion strength, independent of the prehydration. Our results indicate that altered calcite chemical composition or dissolution affects subsequent oil adsorption and removal, and, therefore, there is a competitive role between brine ion strength and oil and surface compositions in the enhanced oil recovery process using LS water.","PeriodicalId":50,"journal":{"name":"Langmuir","volume":"108 1","pages":""},"PeriodicalIF":3.9000,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Oil Removal in Prewet Calcite: Active Versus Inactive Ions Investigated by a Fourier Transform Infrared and X-ray Photoelectron Spectroscopy Study\",\"authors\":\"Jesana M. Loreto, Emilia Annese, L. G. Pedroni, Fernando Stavale\",\"doi\":\"10.1021/acs.langmuir.5c00286\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"In presalt reservoirs, natural rocks interact simultaneously with formation water (FW) and mineral oil. The prehydrated calcites with FW and demineralized water (DW) are suitable model systems to investigate oil adsorption (removal) on (from) their surfaces by Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy. Preliminary characterization of the chemical composition of fresh cleaved calcite conditioned directly with low salinity (LS) waters, FW, and DW indicates that calcite undergoes (i) surface dissolution once in contact with DW and diluted LS water (LS100) as testified by the split of ν<sub>3</sub> vibration bands of the CO<sub>3</sub><sup>2–</sup> group and (ii) partial chemical modification of calcite e through Mg incorporation, water anchoring at the surface, and salt deposit formation at the calcite/FW interface. Pristine and (FW, DW) prewet calcites were conditioned with Nujol, and an overall larger CH<sub>2</sub> and CH<sub>3</sub> vibration band intensity of Nujol was observed on the FW prehydrated surface than calcite/DW/oil and calcite/oil interfaces. The final conditioning of calcite/oil, calcite/FW/oil, and calcite/DW/oil with LS water ended up with greater oil removal for a saline solution of 0.2 mol/L ion strength, independent of the prehydration. 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Oil Removal in Prewet Calcite: Active Versus Inactive Ions Investigated by a Fourier Transform Infrared and X-ray Photoelectron Spectroscopy Study
In presalt reservoirs, natural rocks interact simultaneously with formation water (FW) and mineral oil. The prehydrated calcites with FW and demineralized water (DW) are suitable model systems to investigate oil adsorption (removal) on (from) their surfaces by Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy. Preliminary characterization of the chemical composition of fresh cleaved calcite conditioned directly with low salinity (LS) waters, FW, and DW indicates that calcite undergoes (i) surface dissolution once in contact with DW and diluted LS water (LS100) as testified by the split of ν3 vibration bands of the CO32– group and (ii) partial chemical modification of calcite e through Mg incorporation, water anchoring at the surface, and salt deposit formation at the calcite/FW interface. Pristine and (FW, DW) prewet calcites were conditioned with Nujol, and an overall larger CH2 and CH3 vibration band intensity of Nujol was observed on the FW prehydrated surface than calcite/DW/oil and calcite/oil interfaces. The final conditioning of calcite/oil, calcite/FW/oil, and calcite/DW/oil with LS water ended up with greater oil removal for a saline solution of 0.2 mol/L ion strength, independent of the prehydration. Our results indicate that altered calcite chemical composition or dissolution affects subsequent oil adsorption and removal, and, therefore, there is a competitive role between brine ion strength and oil and surface compositions in the enhanced oil recovery process using LS water.
期刊介绍:
Langmuir is an interdisciplinary journal publishing articles in the following subject categories:
Colloids: surfactants and self-assembly, dispersions, emulsions, foams
Interfaces: adsorption, reactions, films, forces
Biological Interfaces: biocolloids, biomolecular and biomimetic materials
Materials: nano- and mesostructured materials, polymers, gels, liquid crystals
Electrochemistry: interfacial charge transfer, charge transport, electrocatalysis, electrokinetic phenomena, bioelectrochemistry
Devices and Applications: sensors, fluidics, patterning, catalysis, photonic crystals
However, when high-impact, original work is submitted that does not fit within the above categories, decisions to accept or decline such papers will be based on one criteria: What Would Irving Do?
Langmuir ranks #2 in citations out of 136 journals in the category of Physical Chemistry with 113,157 total citations. The journal received an Impact Factor of 4.384*.
This journal is also indexed in the categories of Materials Science (ranked #1) and Multidisciplinary Chemistry (ranked #5).