Effects of calcium, magnesium, and strontium chlorides in determining the total acid number using potentiometric titration

Fernandes, Hayane Amorim; Zanelato, Luana N.; Decote, Paulo A.P.; Santos, Hélisson Nascimento dos; Senger, Caroline M.; Dias, Fabrício Costa; Müller, Edson Irineu; Flores, Érico M.M.; Mendes, Luiz A.N.; Vicente, Maristela de Araújo; Santos, Maria F.P.

doi:10.1016/j.fuel.2021.122522

Cited by 6 publications

(3 citation statements)

References 65 publications

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“…In addition to asphaltenes and resins, crude oil contains two other substances with interfacial activity: petroleum acids (including fatty acids, aromatic acids, and naphthenic acids) and waxes. − Generally, thin oils have low acid values, while heavy oils have high acid values. − Furthermore, fatty acids, such as natural anionic surfactants, inhibit the formation of water-in-oil emulsions. , Naphthenic acid has also been reported to soften rigid interfacial films and promote droplet aggregation. , We have previously reported that oleic acid limits the formation of high-phase-change emulsions and disrupts the stability of oil-in-water emulsions, despite its strong ability to reduce interfacial tension . Therefore, wax is a potential candidate for promoting high phase inversion.…”

Section: Introductionmentioning

confidence: 99%

Synergistic Effect of Asphaltene, Resin, and Wax Improving the Emulsification and Interfacial Properties of a High-Phase-Inversion Thin Oil

He,

Pu,

Yang

et al. 2024

Langmuir

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Nowadays, high-phase-inversion in situ emulsification technology has shown great potential in enhancing oil recovery from high-water-cut thin-oil reservoirs. However, emulsification characteristics, interfacial properties, and the mechanism of high phase inversion have not been systematically described. In this study, an emulsification experiment was conducted to investigate the effects of shear time, shear rate, and temperature on the phase inversion of thin oil. Furthermore, the influence of resin and wax on the dispersion of asphaltene was studied through microscopic morphology analysis. Interfacial tension measurement and interfacial viscoelasticity analysis were carried out to determine the interaction characteristics of asphaltene, resin, and wax at the interface. The results showed that, at 50 °C, the phase-inversion point of thin oil reached as high as 75%, and even at 60 °C, it remained at 70%. The shear time and shear rate did not affect the phase-inversion point of thin oil, while an increase in temperature led to a decrease in the phaseinversion point. Moreover, compared to the 20% phase-inversion point of base oil, the phase-inversion point increased with different proportions of asphaltene, resin, and wax. Particularly, at the ratio of asphaltene/resin/wax = 1:5:9, the phase-inversion point reached as high as 80%, indicating the optimal state. In this proportion, asphaltene aggregates exhibited the smallest and most uniform size, best dispersion, lower interfacial tension, and higher interfacial modulus. These findings provide reference and guidance for further enhancing oil recovery in medium-to-high-water-cut thin-oil reservoirs.

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Section: Introductionmentioning

confidence: 99%

Synergistic Effect of Asphaltene, Resin, and Wax Improving the Emulsification and Interfacial Properties of a High-Phase-Inversion Thin Oil

He,

Pu,

Yang

et al. 2024

Langmuir

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“…The existing methods for automatic identification of titration end-point can be divided into three main categories ( Table 1 ), i.e., potential identification [ 13 ], color identification, and artificial intelligence identification. The potential identification method applies indicator electrodes to detect potential changes in solution reactions [ 14 ] and indicates titration end-point with potential abrupt changes [ 15 ]. The potential identification method is unaffected by solution color and turbidity, and merely relies on the potential abrupt changes to identify the titration end-point when ions react completely; the accuracy of potential identification method measurement is high [ 16 ].…”

Section: Introductionmentioning

confidence: 99%

ResNet14Attention network for identifying the titration end-point of potassium dichromate

Liang

Yin

Zhang

et al. 2023

Heliyon

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“…Cloreto de sódio (NaCl), cloreto de magnésio (MgCl2) e cloreto de cálcio (CaCl2) são os principais responsáveis pelas contaminações de cloretos inorgânicos no petróleo (Mitra et al, 2022). Nos petróleos brasileiros, a proporção de cloretos inorgânicos pode variar: NaCl: 70-76%, MgCl2: 7-20%, CaCl2: 10-14% (Fernandes et al, 2022). Os cloretos inorgânicos, principalmente NaCl, CaCl2 e MgCl2, mesmo em baixas concentrações no petróleo, estão associados a uma série de problemas operacionais (Mitra et al, 2022;Pagliano et al, 2021;Wu et al, 2018).…”

Section: Introductionunclassified

Análise bibliométrica e tendências da pesquisa sobre determinação de cloretos na indústria do petróleo

Negris

Santos

Vicente

2023

Braz. J. Prod. Eng.

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A presença de cloretos inorgânicos, mesmo em baixas concentrações no petróleo, está associada a uma série de problemas operacionais. A determinação de cloretos inorgânicos tem importante papel na indústria do petróleo. Neste estudo, uma análise bibliométrica usando o aplicativo gratuito VOSviewer e a base de dados da Web of Science foi realizada para fornecer uma visão geral na aplicação da determinação de cloretos em petróleo. Um total de 3117 artigos foi analisado em vários aspectos das características da publicação, como produção de publicações, países, instituições, periódicos, artigos altamente citados e palavras-chave. O número de publicações nessa aplicação aumentou de forma constante nos últimos 23 anos. China e EUA foram os países com maior índice de link strength. A China teve um papel central na rede de colaboração entre os países mais produtivos. A Universidade Federal de Santa Maria (UFSM) foi a instituição com maior link strength (88). Energy & Fuels foi o jornal mais produtivo (173). As palavras-chave tensão superficial, líquidos iônicos, emulsão, desemulsificação, adsorção, potencial zeta e molhabilidade são considerados futuros pontos críticos de pesquisa.

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Effects of calcium, magnesium, and strontium chlorides in determining the total acid number using potentiometric titration

Cited by 6 publications

References 65 publications

Synergistic Effect of Asphaltene, Resin, and Wax Improving the Emulsification and Interfacial Properties of a High-Phase-Inversion Thin Oil

Synergistic Effect of Asphaltene, Resin, and Wax Improving the Emulsification and Interfacial Properties of a High-Phase-Inversion Thin Oil

ResNet14Attention network for identifying the titration end-point of potassium dichromate

Análise bibliométrica e tendências da pesquisa sobre determinação de cloretos na indústria do petróleo

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