Evidence of naturally-occurring vanadyl porphyrins containing multiple S and O atoms

Qian, Kuangnan; Fredriksen, Thomas R.; Mennito, Anthony S.; Zhang, Yunlong; Harper, Michael R.; Merchant, Shamel S.; Kushnerick, J. Douglas; Rytting, B. McKay; Kilpatrick, Peter K.

doi:10.1016/j.fuel.2018.09.115

Cited by 30 publications

(36 citation statements)

References 20 publications

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“…Zhao et al [35] combined chromatographic fractionation with ESI-FT-ICR-MS, and identified three series of vanadyl porphyrins that contained functional oxygen groups. Shi et al [36] detected simultaneous vanadyl, nickel, iron, and gallium porphyrins in an asphaltene sample derived from marine shale with ESI-FT-ICR-MS. An overview of known vanadyl, nickel, and iron petroporphyrin types is shown in Table 3 [174].…”

Section: Metals In Asphaltene By Ms Molecular Techniquementioning

confidence: 99%

Fractionation and Characterization of Petroleum Asphaltene: Focus on Metalopetroleomics

et al. 2020

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Asphaltenes, as the heaviest and most polar fraction of petroleum, have been characterized by various analytical techniques. A variety of fractionation methods have been carried out to separate asphaltenes into multiple subfractions for further investigation, and some of them have important reference significance. The goal of the current review article is to offer insight into the multitudinous analytical techniques and fractionation methods of asphaltene analysis, following an introduction with regard to the morphologies of metals and heteroatoms in asphaltenes, as well their functions on asphaltene aggregation. Learned lessons and suggestions on possible future work conclude the present review article.

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Section: Metals In Asphaltene By Ms Molecular Techniquementioning

confidence: 99%

Fractionation and Characterization of Petroleum Asphaltene: Focus on Metalopetroleomics

et al. 2020

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“…We recently established a method to isolate ultrahigh-purity petroporphyrins from the high boiling fractions of petroleum resids and characterized their purity with various measures, 37 with evidence of multiple S- and O-containing petroporphyrins and their unique distribution. 22…”

Section: Introductionmentioning

confidence: 99%

Elucidating the Geometric Substitution of Petroporphyrins by Spectroscopic Analysis and Atomic Force Microscopy Molecular Imaging

et al. 2019

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Determination of the molecular structures of petroporphyrins has been crucial to understand the diagenetic pathways and maturation of petroleum. However, these studies have been hampered by their structural complexity and the challenges associated with their isolation. In comparison to the skeletal macrocyclic structures, much less is known about the substitutions, which are more sensitive to the maturation and diagenesis pathways. While these isolated vanadyl petroporphyrins largely consist of etioporphyrin and deoxophylloerythroetioporphyrin as expected, surprisingly, we find evidence that one or a few β hydrogens are present in petroporphyrins of low carbon numbers using a combination of ultraviolet–visible spectroscopy, Fourier transform ion cyclotron resonance mass spectrometry, and non-contact atomic force microscopy. Petroporphyrins with β hydrogens were not anticipated on the basis of their biological precursors. The data support dealkylation under catagenesis but not transalkylation or random alkylation of the β and meso positions, despite the fact that more complex porphyrin structures are formed.

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“…Vanadium compounds are typically found as complexes with porphyrin. Compounds that can potentially exhibit a porphyrin‐like structure, with additional aromatic rings and thiophene were reported in previous studies . However, the compounds found in this study contain three nitrogen atoms and hence, they are not likely to have a porphyrin‐like structure.…”

Section: Resultsmentioning

confidence: 99%

Molecular Level Investigation of Oil Sludge at the Bottom of Oil Tank in Ratawi Oil Field by Atmospheric Pressure Photo Ionization Ultrahigh‐resolution Mass Spectrometry

Cho

Abed

Kim

2020

Bulletin Korean Chem Soc

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The crude oil precipitate recovered from the bottom of oil tanks in the Ratawi oil field is analyzed by positive mode atmospheric pressure photoionization ultrahigh-resolution mass spectrometry (APPI UHR-MS). The precipitate is fractionated into three fractions and according to the APPI UHR-MS data, the mass spectrum of the top fraction is similar to that of the original oil while the middle fraction shows the lowest M n and m/z distribution. The data obtained with APPI technique show that hydrocarbon molecules with aromatic rings and long alkyl chains are more abundant in the bottom fraction. In addition, vanadium is also found to be abundant in the bottom fraction. This study shows that aromatic compounds with long alkyl chains can be responsible for the solid deposits that are potentially harmful to oil processing equipment. Moreover, these results provide a basis for understanding the chemistry of the oil sludge formation.

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Evidence of naturally-occurring vanadyl porphyrins containing multiple S and O atoms

Cited by 30 publications

References 20 publications

Fractionation and Characterization of Petroleum Asphaltene: Focus on Metalopetroleomics

Fractionation and Characterization of Petroleum Asphaltene: Focus on Metalopetroleomics

Elucidating the Geometric Substitution of Petroporphyrins by Spectroscopic Analysis and Atomic Force Microscopy Molecular Imaging

Molecular Level Investigation of Oil Sludge at the Bottom of Oil Tank in Ratawi Oil Field by Atmospheric Pressure Photo Ionization Ultrahigh‐resolution Mass Spectrometry

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