The stability and evolution of oil systems studied <i>via</i> advanced methods <i>in situ</i>

Martyanov, Oleg N.; Larichev, Yu. V.; Morozov, Evgeny V.; Trukhan, S. N.; Kazarian, Sergei G.

doi:10.1070/rcr4742

Cited by 37 publications

(25 citation statements)

References 30 publications

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“…SAXS experimental results can be compared to calculations of scattering length density using chemical composition. This technique is applicable to obtain the size from radius of gyration and power law exponents providing details about physical properties of the crude oil sample [38][39][40][41][42][43][44][45].…”

Section: Small-angle X-ray Scattering (Saxs)mentioning

confidence: 99%

Wax Deposition in Crude Oil Transport Lines and Wax Estimation Methods

Alnaimat¹,

Ziauddin²,

Mathew³

2020

Intelligent System and Computing

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Petroleum industry is one of the major industries serving the energy demands. Flow assurance is essential for providing continuous fuel supply. Wax deposition is the main issue that affects flow assurance or reduces the efficiency of transporting crude oil. As the maintenance cost of repairing and troubleshooting is very high, addressing issues related to flow assurance becomes critical in the petroleum industry. This chapter will explore methods used for reducing, cleaning, and monitoring deposition of wax. Wax dissolved in the crude oil gets crystallized causing accumulation across the pipe walls once the bulk temperature of the crude oil gets lower than wax appearance temperature (WAT). Mechanical, thermal, chemical, and microbial methods highlighting general practice in the industry are discussed in this chapter. Next, the direct techniques providing information about the numerical wax deposition models used along with scientific measurement techniques are emphasized. Later, the indirect measurement techniques are discussed providing information about the external probing and nondestructive techniques to obtain information about wax layer deposition inside the pipe. The role of artificial intelligence and use of fuzzy logic for effective wax prediction or in developing the existing wax numerical models are emphasized in the last section.

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Section: Small-angle X-ray Scattering (Saxs)mentioning

confidence: 99%

Wax Deposition in Crude Oil Transport Lines and Wax Estimation Methods

Alnaimat¹,

Ziauddin²,

Mathew³

2020

Intelligent System and Computing

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“…Among them, vanadium and nickel are a common cause of catalyst degradation and deactivation in hydrotreatment units. For the effective extraction of the metals, the molecular structure of the metal complexes and their location (binding) in the asphaltene-resin aggregates are intensively studied [1][2][3][4][5][6]. These studies appear even more interesting in light of the data proposing vanadyl complexes as a part of quantum computers [7,8] and even as a sensitive probe in biomedical applications [9].…”

Section: Introductionmentioning

confidence: 99%

“…Dickie and Yen were the first to suggest that, having many of the same interactive groups as asphaltenes, petroporphyrins could also play a role in asphaltene self-assembly, adsorption, and phase separation [24]. It is common knowledge that intermolecular interactions, such as hydrogen bonding, dipole−dipole interactions, and π − π stacking, in asphaltenes lead to aggregation into nanoaggregates in the bulk oil phase and the formation of elastic films at organic−aqueous interfaces although the basic asphaltene structure and mechanism of aggregation continue to be debated [2,17,25]. The relationship between petroporphyrins and asphaltenes is largely unexplored [1,4,[26][27][28].…”

Section: Introductionmentioning

confidence: 99%

“…Since practically all petroleum systems, especially highmolecular oil components (asphaltenes and resins) are paramagnetic [29][30][31][32], the presence of intrinsic paramagnetic centers (PC), primarily paramagnetic vanadyl-porphyrin complexes and organic "free" radicals (FR), gives an opportunity to study the structure (organization) of petroleum complexes without additional processing, in situ [2]. Different aspects of application of various electron paramagnetic resonance (EPR) and double resonance (ENDOR) techniques for the elucidation of the asphaltene architecture and the oil PC nature are covered in refs.…”

Section: Introductionmentioning

confidence: 99%

“…Different aspects of application of various electron paramagnetic resonance (EPR) and double resonance (ENDOR) techniques for the elucidation of the asphaltene architecture and the oil PC nature are covered in refs. [2,19,[32][33][34][35][36][37][38][39][40][41][42][43][44][45][46].…”

Section: Introductionmentioning

confidence: 99%

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High-Field (3.4 T) ENDOR Investigation of Asphaltenes in Native Oil and Vanadyl Complexes by Asphaltene Adsorption on Alumina Surface

et al. 2019

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Vanadyl porphyrin complexes in asphaltenes from heavy (Karmalinskoye) oil and in asphaltene films obtained as a result of adsorption on the surface of aluminum oxide were studied by electron paramagnetic resonance (EPR) and double electron-nuclear resonance (ENDOR) in the W-band frequency range (microwave frequency of 95 GHz, magnetic field of 3.4 T). Mims ENDOR spectra from 1H and 27Al nuclei are observed. ENDOR spectra are different for native oil and asphaltenes from one side and the adsorbed samples from the other side while no significant changes in X- (microwave frequency of 9 GHz) or W-band EPR spectra are found. The results allow supposing that vanadyl porphyrin complexes (at least in the studied asphaltene films) participate in the formation of asphaltene aggregates through the functional groups rather than π−π interactions. The data show the feasibility of the commercial pulsed ENDOR approaches for the investigation of crude oils and their constituents under external influence.

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