1998
DOI: 10.1021/ef9701854
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Characterization of Asphaltenes Molecular Structure

Abstract: The features of molecular structure of seven n-C7 asphaltenes isolated from different feedstocks (i.e., vacuum residue, atmospheric residue and crude oil) have been investigated by pyrolysisgas chromatography/mass spectrometry (Py-GC/MS), and their average structural parameters have been estimated using a mathematical optimization method. The results of structural analysis pointed out substantial differences among the asphaltenes investigated. The size of aromatic fused ring systems ranged from 5.1 to 14.9, wh… Show more

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Cited by 83 publications
(71 citation statements)
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“…Asphaltenes are the precursors of coke formation because they are formed from large molecules that have high coke forming tendencies that inevitable ends up in HDT catalysts deactivation. They also cause variations in the relative rates of catalytic reactions such as hydrodesulfurization [2][3][4].…”
Section: Introductionmentioning
confidence: 99%
“…Asphaltenes are the precursors of coke formation because they are formed from large molecules that have high coke forming tendencies that inevitable ends up in HDT catalysts deactivation. They also cause variations in the relative rates of catalytic reactions such as hydrodesulfurization [2][3][4].…”
Section: Introductionmentioning
confidence: 99%
“…They are defined basing on their method of precipitation i.e. as a fraction of bitumen that is soluble in light aromatic hydrocarbons but insoluble in low molecular weight paraffins such as pentane [1][2][3][4]. It is well known that asphaltenes consist of condensed aromatic rings, bound by alkyl chains and containing various functional groups i.e.…”
Section: Introductionmentioning
confidence: 99%
“…Other more recent studies, which are not inevitably on the OMWW but on some compounds, belong to the same family [39,[57][58]. According to the work in the literature on organic compounds, polyphenols and flavonoids (antioxidants) [9,[39][40]47,53,[56][57][58][59][60][61][62][63][64][65][66]. Typical 13 C NMR spectra are presented in (Fig.…”
mentioning
confidence: 98%