Adsorption of Pentane Insoluble Organic Matter from Oilsands Bitumen onto Clay Surfaces

Tu, Yun; Kingston, David; Kung, J.; Kotlyar, L.S.; Sparks, B.D.; Chung, Keng H.

doi:10.1080/10916460500280985

Cited by 28 publications

(59 citation statements)

References 18 publications

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“…The adsorption process often follows a Langmuir-type isotherm, although the mechanism for film formation and factors which contribute to monolayer and multi-layer films continue to be debated. 51,60,[64][65][66][67]70,75 The detailed discussion of adsorption "isotherms" is outside the scope of this article.…”

Section: Asphaltene Adsorptionmentioning

confidence: 99%

“…Heteroatoms (N, O, and S), largely contained in the ring system, have been found to be enriched in asphaltenes adsorbed onto clays in comparison with bulk asphaltenes. [75][76][77] The adsorption amount of asphaltenes onto kaolinite was reported to increase with increasing nitrogen and sulphur contents of asphaltenes. 77 The presence of heteroatoms in the form of polar functional groups in asphaltenes plays an important role in asphaltene-adsorbent interactions, presumably mainly through hydrogen bonding.…”

Section: Fractionation Of Asphaltenes Based On Asphaltene Adsorption mentioning

confidence: 99%

“…70 In addition, the asphaltenes with a higher degree of aromaticity showed enhanced affinity to adsorbents in both computational 92 and real adsorption studies. [75][76][77] Although intriguing, it remains unclear as to the correlation between specific structures and adsorption behaviors of asphaltenes. Therefore, it would be informative to fractionate asphaltenes based on their adsorption characteristics to better understand the adsorption mechanisms of asphaltenes at oil-solid interfaces.…”

Section: Fractionation Of Asphaltenes Based On Asphaltene Adsorption mentioning

confidence: 99%

“…26,[80][81][82][83][84][85][86] The asphaltenes adsorbed onto clays have also been found to be different in composition from whole asphaltenes. 70,[75][76][77] Therefore, it is important to find ways to extract and study these particular species from asphaltenes, which are mainly responsible for the relevant issues of interest. The fractionation of asphaltenes allows the investigation of these asphaltene subfractions thereby providing necessary information to improve our understanding of the governing mechanisms and develop efficient mitigating approaches to the related problems.…”

Section: Extended-sara (E-sara)mentioning

confidence: 99%

“…19,26,59 A range of experimental techniques have been adopted to study the adsorption of asphaltenes onto several different substrates including silica, [60][61][62] [69][70][71][72][73][74][75][76][77][78] Using quartz crystal microbalance with dissipation (QCM-D), asphaltene adsorption and film formation have been studied in real time. 51,60,61,64-66 X-ray photoelectron spectroscopy (XPS), 65,75 X-ray diffraction (XRD), 72,74,75 small-angle X-ray scattering (SAXS), 74 Fourier transform infrared spectroscopy (FTIR) 71,72,74 and Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) 73 have been applied to characterize the surface modification by asphaltene adsorption. It is however not straightforward to compare the results from different adsorption studies since asphaltene adsorption is a complex process affected by many aspects such as source of asphaltenes, type of solvents (quality and composition), moisture content of solvents, flow condition, temperature, etc.…”

Section: Asphaltene Adsorptionmentioning

confidence: 99%

See 4 more Smart Citations

Fractionation of Asphaltenes in Understanding Their Role in Petroleum Emulsion Stability and Fouling

et al. 2017

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SARA fractionation separates the oil into fractions of saturates (S), aromatics (A), resins (R), and asphaltenes (A) based on the differences in their polarizability and polarity.Defined as a solubility class, asphaltenes are normally considered as a menace in the petroleum industry mainly due to their problematic precipitation and adsorption at oil water and oil-solid interfaces. As a broad range of molecules fall within the group of asphaltenes with distinct sizes and structures, considering the asphaltenes as a whole was noted to limit the deep understanding of governing mechanisms in asphaltene-induced problems.Extended-SARA (E-SARA) is being proposed as a concept of asphaltene fractionation according to their interfacial activities and adsorption characteristics, providing critical information to correlate specific functional groups with certain characteristics of asphaltene aggregation, precipitation and adsorption. Such knowledge obtained is essential to addressing asphaltene-related problems by targeting specific subfractions of asphaltenes for selective removal.2

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Section: Asphaltene Adsorptionmentioning

confidence: 99%

Section: Fractionation Of Asphaltenes Based On Asphaltene Adsorption mentioning

confidence: 99%

Section: Fractionation Of Asphaltenes Based On Asphaltene Adsorption mentioning

confidence: 99%

Section: Extended-sara (E-sara)mentioning

confidence: 99%

Section: Asphaltene Adsorptionmentioning

confidence: 99%

See 3 more Smart Citations

Fractionation of Asphaltenes in Understanding Their Role in Petroleum Emulsion Stability and Fouling

et al. 2017

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Prediction of asphaltene adsorption capacity of clay minerals using machine learning

et al. 2022

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A thorough understanding of asphaltene adsorption on clay minerals is particularly important in oil production and contaminated soil remediation using claybased adsorbents. In this paper, we introduced a machine learning approach as a reliable alternative for commonly used adsorption isotherms that suffer from inherent limitations in the prediction of asphaltene adsorption onto clay minerals. Machine learning (ML) models, namely multilayer perceptron (MLP), support vector machine (SVM), decision tree (DT), random forest (RF), and committee machine intelligent system (CMIS) combined with two optimizers were used. Experimental data (142 data points for six different clay minerals) was used for the modelling. To improve the accuracy of the smart models, a comprehensive data preparation such as outlier removal and feature selection was carried out. The results showed that relatively all the proposed models predict asphaltene adsorption on clay minerals with acceptable precision. Nevertheless, the MLP model showed superior performance compared with other models in which the overall root mean square error (RMSE) and coefficient of determination (R 2 ) values of 6.72 and 0.93 were obtained, respectively. Finally, the developed MLP model was compared with the well-known adsorption isotherms of Langmuir and Freundlich and exhibited superior performance.

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Improving compositional space accessibility in (+) APPI FT-ICR mass spectrometric analysis of crude oils by extrography and column chromatography fractionation

Giraldo-Dávila

Chacón-Patiño

Orrego-Ruiz

et al. 2016

Fuel

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Adsorption of Pentane Insoluble Organic Matter from Oilsands Bitumen onto Clay Surfaces

Cited by 28 publications

References 18 publications

Fractionation of Asphaltenes in Understanding Their Role in Petroleum Emulsion Stability and Fouling

Fractionation of Asphaltenes in Understanding Their Role in Petroleum Emulsion Stability and Fouling

Prediction of asphaltene adsorption capacity of clay minerals using machine learning

Improving compositional space accessibility in (+) APPI FT-ICR mass spectrometric analysis of crude oils by extrography and column chromatography fractionation

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