X-ray diffraction analysis of the resinous-asphaltene components of West Siberian crude oil

Kam’yanov, V.F.; Bodraya, N.V.; Sivirilov, P. P.; Унгер, Ф. Г.; Filimonova, T.A.; Chernyavskii, V.N.

doi:10.1016/0031-6458(89)90001-4

Cited by 9 publications

(12 citation statements)

References 2 publications

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“…Different structural parameters can be obtained from the XRD patterns. ,− The diameter of the aromatic planar sheet ( L a ), the height of the crystallite in the c -axis direction ( L c ), the distance between two aromatic sheets ( d m ), the average number of stacked aromatic sheets ( M ) per one cluster and the distance between two saturated chains ( d γ ), the aromaticity ( f a ), and the average numbers of aromatic rings in one aromatic sheet ( R a ) have been determined in the present study.…”

Section: Results and Discussionmentioning

confidence: 99%

“…The diffractograms were normalized, and γ and (002) bands were resolved employing the methods proposed in earlier studies . The background was established by drawing a straight line that connected data from zones within the observed profile that lacked diffraction contributions.…”

Section: Results and Discussionmentioning

confidence: 99%

“…The diffractograms were normalized, and γ and (002) bands were resolved employing the methods proposed in earlier studies. 45 The background was established by drawing a straight line that connected data from zones within the observed profile that lacked diffraction contributions. All of the diffractograms plotted against sin(θ)/λ were deconvoluted as the sum of Gaussian distributions, and the bandwidth at halfheight (B 1/2 ) was obtained for (002) and ( 001) bands (see Table S1).…”

Section: Energy and Fuelsmentioning

confidence: 99%

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Elucidation of the Average Molecular Structure of Argentinian Asphaltenes

et al. 2019

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Petroleum asphaltenes were separated from three different Argentinian crude oils. The asphaltene fractions were extracted by precipitation employing n-pentane and n-heptane solvents, and the coprecipitated resins were removed via Soxhlet extraction. The asphaltenes were characterized by elemental analysis, thermogravimetric analysis, laser desorption ionization mass spectrometry, Fourier-transform infrared spectroscopy, proton nuclear magnetic resonance, powder X-ray diffraction, and Raman spectroscopy. It was found that the asphaltene fractions present both a higher content of heteroatoms and a major degree of aromaticity, when n-heptane is employed. Average structural parameters were obtained by a comprehensive analysis of the experimental data, including those describing the central polycyclic aromatic hydrocarbon (PAH) cores and lateral chains. Thus, a hypothetical average molecular structure is proposed for the Argentinian asphaltenes. The average model molecules have a nucleus of PAHs arranged as pericondensed systems of 4−6 fused aromatic rings, with naphthenic groups and/or alkyl chains of 5−10 carbon long attached.

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Section: Results and Discussionmentioning

confidence: 99%

Section: Results and Discussionmentioning

confidence: 99%

Section: Energy and Fuelsmentioning

confidence: 99%

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Elucidation of the Average Molecular Structure of Argentinian Asphaltenes

et al. 2019

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“…Radiation assisted oxidation. 130 One of the virtues of this technology is the possibility of achieving any desired degree of sulfur oxidation at minimum processing time and maximum process simplicity. This was supplemented by radiation methods developed for H 2 S extraction from gaseous mixes.…”

Section: Ods By Other Methodsmentioning

confidence: 99%

“…The application of ozone as an oxidizer for oil mixtures was proposed earlier. 130 One of the virtues of this technology is the possibility of achieving any desired degree of sulfur oxidation at minimum processing time and maximum process simplicity. This approach is technically feasible; however, it requires the development of special equipment and use of a multi-step process.…”

Section: Radiation Assisted Oxidationmentioning

confidence: 99%

An evaluation of desulfurization technologies for sulfur removal from liquid fuels

2012

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Sulfur compounds represent one of the most common impurities present in the crude oil. Sulfur in liquid fuel oil leads directly to the emission of SO 2 and sulfate particulate matter (SPM) that endangers public health and community property; and reduces the life of the engine due to corrosion. Furthermore, the sulfur compounds in the exhaust gases of diesel engines can significantly impair the emission control technology designed to meet NO x and SPM emission standards. The research efforts for developing conventional hydrodesulfurization and alternative desulfurization methods such as selective adsorption, biodesulfurization, oxidation/extraction (oxidative desulfurization), etc. for removing these refractory sulfur compounds from petroleum products are on the rise. Research laboratories and refineries are spending huge amounts of money in finding a viable and feasible solution to reduce sulfur to a concentration of less than 10 mg l 21 . This paper reviews the current status in detail of various desulphurization techniques being studied worldwide. It presents an overview of novel emerging technologies for ultra-deep desulfurization so as to produce ultra-lowsulfur fuels.

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Comprehensive review on heavy-oil emulsions: Colloid science and practical applications

Lee

Babadagli

2020

Chemical Engineering Science

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X-ray diffraction analysis of the resinous-asphaltene components of West Siberian crude oil

Cited by 9 publications

References 2 publications

Elucidation of the Average Molecular Structure of Argentinian Asphaltenes

Elucidation of the Average Molecular Structure of Argentinian Asphaltenes

An evaluation of desulfurization technologies for sulfur removal from liquid fuels

Comprehensive review on heavy-oil emulsions: Colloid science and practical applications

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