Simple Methods for the Separation of Various Subfractions from Coal and Petroleum Asphaltenes

Musin, L. I.; Foss, L. E.; Shabalin, K. V.; Nagornova, O. A.; Borisova, Yu. Yu.; Borisov, D. N.; Yakubov, M. R.

doi:10.1021/acs.energyfuels.9b03283

Cited by 8 publications

(14 citation statements)

References 110 publications

(132 reference statements)

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“…Particularly, SARA has been identified as the most used approach, resulting from the good ability to separate asphaltene fractions from others, including the saturated, aromatic, and resin fractions [32][33][34]. This technique is initiated by dissolving the crude oil in dichloromethane solvent, followed by the addition of alumina material, and drying through flowing nitrogen gas [35].…”

Section: ■ Detection and Quantification Of Metallic Porphyrins In Crude Oilsmentioning

confidence: 99%

The Origin, Physicochemical Properties, and Removal Technology of Metallic Porphyrins from Crude Oils

et al. 2021

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Crude oil is an indispensable energy feedstock for daily activities, although some amounts of metallic porphyrins components with undesired characteristics have been identified. These constituents are assumed to originate from the geochemical process of chlorophyll and heme derivatives. In addition, their chemical structures have been thoroughly characterized using spectroscopy techniques, while several analytical methods were adopted in the detection and concentration quantification in the crude oils. The metallic porphyrins have several demerits, including the deactivation of used catalysts, contamination of the treated petrochemical products, and corrosion of the industrial equipment. Also, the removal process is considered challenging due to the strong interaction with the asphaltene fraction of crude oil. This review article, therefore, provides brief information on the origin, physicochemical properties, and possible removal technology of metallic porphyrins from crude oil samples. Besides, a better understanding of chemistry contributes a useful insight towards the development and establishment of better futuristic processing technology.

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Section: ■ Detection and Quantification Of Metallic Porphyrins In Crude Oilsmentioning

confidence: 99%

The Origin, Physicochemical Properties, and Removal Technology of Metallic Porphyrins from Crude Oils

et al. 2021

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“…The methods include mixing polar and nonpolar solvents, ionic liquids, fluids supercritical of solvents, different chromatographic and adsorption methods, metal oxide nanoparticles, and complexation with different compounds. 10 The extractive separation methods require a specific combination of polar and nonpolar solvents appropriated for the composition of asphaltene derivatives. Therefore, it is difficult to find a single solvent combination for extractive separation of asphaltene derivatives because the intermolecular interactions depend on the heteroatoms, the coordination properties of transition metals, and the presence of free radicals.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Therefore, it is difficult to find a single solvent combination for extractive separation of asphaltene derivatives because the intermolecular interactions depend on the heteroatoms, the coordination properties of transition metals, and the presence of free radicals. 10 The extraction of asphaltenes using supercritical fluids has environmental and chemical advantages, but high temperatures can alter the chemical composition of asphaltenes. The extraction with ionic liquids is an efficient method but expensive.…”

Section: ■ Introductionmentioning

confidence: 99%

Harvesting of Surfactant-Solubilized Asphaltenes by Magnetic Nanoparticles

et al. 2022

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Asphaltenes are a severe problem for the oil industry. The high content of aromatic and aliphatic hydrocarbons in asphaltenes poses a challenge for efficient methods of the solubilization and degradation of their components. The main goal of this study was to investigate an efficient and innovative method for asphaltene solubilization with surfactants to produce supramolecular aggregates with affinity by magnetic nanoparticles (Fe 3 O 4 ) for magnetic separation and degradation. Asphaltene mixed with the cationic surfactant cetyltrimethylammonium bromide (CTAB) was both solubilized in chloroform and the solvent dried with N 2 to produce a film that was resuspended in water and formed a stable colloid with asphaltene incorporated in CTAB micelles. The suspensions of CTAB/asphaltene supramolecular aggregates obtained at different surfactant/asphaltene ratios were characterized by dynamic and static light scattering (DLS and SLS) and by electrophoretic mobility for ζ potential determination. CTAB concentrations of 30 and 60 mM produced spherical supramolecular aggregates (SMAs) of size between 100 and 200 nm with polydispersity. The ζ potential of CTAB micelles loaded with asphaltenes increased from +9.17 +/− 4.6 to +56.7 +/− 5.8 eV. Electron paramagnetic resonance revealed that asphaltene forms stable free radicals in CTAB micelles. Classical molecular dynamics simulations were also used to study interactions of the functional groups of asphaltenes. The association with CTAB micelles provided the binding affinity of asphaltenes for nanoparticulate magnetite (Fe 3 O 4 ) and precipitation of the most CTAB content. In this condition, Fe 3 O 4 promoted the degradation of asphaltenes to low molecular mass products. Therefore, incorporation in CTAB micelles is a simple and innovative method contributing to asphaltene removal, degradation, and possible conversion to products with aggregated value.

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“…In this regard, it is worth noting that during the processing of asphaltenes, the number of aliphatic side groups remaining in the system can be controlled. 54 Therefore, we assume that these aliphatic groups might be a means to vary the miscibility between asphaltenes and P3HT containing side hexyl groups of the same chemical nature, and thereby the active layer morphology. Our intriguing computationally guided assumptions certainly require experimental verification that we plan to carry out in the nearest future.…”

mentioning

confidence: 99%

“…Since our analysis is limited by the simulation box sizes available in classical all-atom MD simulations and mainly determined by computational costs, we can only speculate on the behavior of components at larger length scales. In this regard, it is worth noting that during the processing of asphaltenes, the number of aliphatic side groups remaining in the system can be controlled . Therefore, we assume that these aliphatic groups might be a means to vary the miscibility between asphaltenes and P3HT containing side hexyl groups of the same chemical nature, and thereby the active layer morphology.…”

mentioning

confidence: 99%

Model Carboxyl-Containing Asphaltenes as Potential Acceptor Materials for Bulk Heterojunction Solar Cells

et al. 2021

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We put forward chemically modified asphaltenes, polycyclic aromatic byproducts of deep oil refining, for use as novel low-cost acceptor materials for bulk heterojunction (BHJ) solar cells. The electronic properties of asphaltenes with varying chemical structures are studied by density functional theory (DFT), while the morphology of DFTselected carboxyl-containing asphaltenes mixed with poly(3-hexylthiophene) (P3HT) as a model polymer-donor is investigated by means of all-atom molecular dynamics (MD) simulations. DFT calculations show that the chemical modification of asphaltenes with carboxyl groups enables their energy levels to be fine-tuned, thereby obtaining the desirable energy difference between the lowest unoccupied molecular orbitals of the acceptor and donor materials for efficient charge transfer. MD simulations reveal the heterophase morphology of the P3HT/asphaltene mixture, as well as the formation of extended stacks of asphaltenes via π−π stacking between their polyaromatic cores. Overall, from both the electronic and morphological standpoints, carboxyl-containing asphaltenes do indeed represent a potential low-cost acceptor for BHJ solar cells.

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Simple Methods for the Separation of Various Subfractions from Coal and Petroleum Asphaltenes

Cited by 8 publications

References 110 publications

The Origin, Physicochemical Properties, and Removal Technology of Metallic Porphyrins from Crude Oils

The Origin, Physicochemical Properties, and Removal Technology of Metallic Porphyrins from Crude Oils

Harvesting of Surfactant-Solubilized Asphaltenes by Magnetic Nanoparticles

Model Carboxyl-Containing Asphaltenes as Potential Acceptor Materials for Bulk Heterojunction Solar Cells

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