Nuclear magnetic resonance spectrometry of petroleum fractions.  Carbon-13 and proton nuclear magnetic resonance characterizations in terms of average molecule parameters

Clutter, Dale R.; Petrakis, L.; Stenger, R. L.; Jensen, R. K.

doi:10.1021/ac60316a002

Cited by 178 publications

(47 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The history of 1 H and 13 C NMR spectroscopy shows that application of these techniques for compositional characterization of petroleum fractions was a breakthrough and was considered a novel development in this area [23][24][25]. According to the specifications given in the literature, there are two problems in obtaining quantitatively reliable data using 13 C NMR spectroscopy to study asphaltenes: differences in relaxation times for different molecules present in asphaltenes and the extensive variations in the Nuclear Overhauser Enhancement (NOE) parameter [24].…”

Section: Nmr Spectroscopymentioning

confidence: 99%

“…Among the compositional characterization techniques used for petroleum fractions, 13 C and 1 H NMR spectroscopy have gained popularity [23]. By determining the number, type and relative positions of hydrogen and carbon atoms through 1 H and 13 C NMR spectra, several parameters are calculable, which provide information to predict the structure of the average molecule in a given fraction, such as asphaltene [23,34].…”

Section: Nmr Analysismentioning

confidence: 99%

“…By determining the number, type and relative positions of hydrogen and carbon atoms through 1 H and 13 C NMR spectra, several parameters are calculable, which provide information to predict the structure of the average molecule in a given fraction, such as asphaltene [23,34]. The various types of protons that are present in the asphaltene fraction express different intensities.…”

Section: Nmr Analysismentioning

confidence: 99%

See 2 more Smart Citations

Structural Study of Asphaltenes from Iranian Heavy Crude Oil

Davarpanah

Vahabzadeh

Dermanaki

2013

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

View full text Add to dashboard Cite

and available online here Cet article fait partie du dossier thématique ci-dessous publié dans la revue OGST, Vol. 70, n°6, pp. 909-1132 et téléchargeable ici D o s s i e rOil & Gas Science and Technology -Rev. IFP Energies nouvelles, Vol. 70 (2015), No. 6, pp. 909-1132 Copyright © 2015, IFP Energies nouvelles > Editorial -Enhanced Oil Recovery (EOR), Asphaltenes and HydratesÉditorial -EOR «récupération assistée du pétrole», Asphaltènes et Hydrates D. Langevin and F. Baudin ENHANCED OIL RECOVERY (EOR) > HP-HT Drilling Mud Based on Environmently-Friendly Fluorinated ChemicalsBoues de forage HP/HT à base de composés fluorés respectueux de l'environnement Résumé -Étude structurale d'asphaltènes de pétrole brut lourd iranien -Dans la présente étude, la précipitation d'asphaltènes du pétrole brut lourd iranien (au large du golfe Persique) a été effectuée au moyen de n-pentane (n-C 5 ) et de n-heptane (n-C 7 ) comme alcanes légers précipitants. Plusieurs techniques analytiques, chacune utilisant différents principes, ont ensuite été utilisées pour caractériser la structure des asphaltènes précipités. Le rendement en asphaltènes obtenu par l'utilisation du précipitant n-pentane était plus élevé que pour les asphaltènes précipités à l'aide du n-heptane. L'extraction des asphaltènes a affecté les fractions de maltènes n-C 5 et n-C 7 à des températures inférieures à 204 °C, comme l'indiquent les données obtenues par la technique de distillation simulée. La viscosité du pétrole lourd est influencée par la teneur et le comportement des asphaltènes. La dépendance de la viscosité du pétrole lourd testé avec le taux de cisaillement appliqué a été déterminée et l'écoulement était faible à γ. supérieur à 25 s -1 . Les échantillons de pétrole lourd reconstitués ont été préparés en ajoutant différentes quantités d'asphaltènes aux maltènes (pétrole lourd désasphalté) et les effets des asphaltènes ont été plus prononcés à la basse température de 25 °C, comparés à ceux obtenus à des températures plus élevées. Selon le modèle de loi de puissance utilisé dans cette étude, la fluidité du pétrole lourd testé a révélé un caractère pseudoplastique. Les résultats structuraux obtenus à partir de la spectroscopie InfraRouge à Transformée de Fourier (IRTF) ont montré la présence de différents groupes fonctionnels dans les asphaltènes précipités. Par exemple, la présence de différents hydrocarbures (aliphatique, aromatique et alicyclique), basée sur leurs caractéristiques dans le spectre IRTF, a été confirmée. Les résines sont des dispersants efficaces et le retrait de cette fraction du pétrole brut perturbe la nature colloïdale du pétrole lourd, la floculation et la précipitation des asphaltènes finissant par se produire. L'apparition de pores sur les images SEM (Scanning Electron Microscopy) a été utilisée comme indicateur du détachement de la résine. A l'aide de la spectroscopie de Résonance Magnétique Nucléaire (RMN) 1 H et 13 C, deux paramètres structuraux importants des asphaltènes ont été déterminés. A savoir, l'aromaticité (f a ) et...

show abstract

Section: Nmr Spectroscopymentioning

confidence: 99%

Section: Nmr Analysismentioning

confidence: 99%

Section: Nmr Analysismentioning

confidence: 99%

See 1 more Smart Citation

Structural Study of Asphaltenes from Iranian Heavy Crude Oil

Davarpanah

Vahabzadeh

Dermanaki

2013

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

View full text Add to dashboard Cite

show abstract

“…Crude petroleum contains many kinds of hydrocarbons which are fractionated into saturated and aromatic hydrocarbons, resins, and asphaltenes by silica gel chromatography 4,20) . A number of compounds slightly degradable by microorganisms are contained in the fraction of aromatic hydrocarbons.…”

mentioning

confidence: 99%

Change in the Predominant Bacteria in a Microbial Consortium Cultured on Media Containing Aromatic and Saturated Hydrocarbons as the Sole Carbon Source

2007

View full text Add to dashboard Cite

A No.22 consortium was isolated from contaminated soils at oilfields by repeated transfer on a mineral salts medium with the aromatic hydrocarbon fraction from crude petroleum. The consortium was able to degrade aromatic hydrocarbons at high rates. Fourteen major DNA bands were detected in the consortium by PCR-DGGE. Three strains were capable of forming colonies on agarose plates containing mineral salts and aromatic hydrocarbons, and identified as Pandoraea sp. Y1, Hyphomicrobium facile Y3, and Burkholderia multivorans Y4 by 16S rRNA gene sequencing. The consortia of three cultures; an aromatic subculture, a saturated culture transferred from the subculture, and an aromatic obtained culture from the transferred culture, were compared using PCR-DGGE, a clone library, and quantitative real-time PCR. Burkholderia species containing strain Y4 became the dominant species in the saturated culture whereas its abundance decreased in the aromatic culture. Pandoraea sp. Y1, which was of low abundance in the saturated culture, and an unisolated bacterium, Brachymonas sp. F, in contrast, increased in the aromatic culture. The aromatic hydrocarbons were degraded by Pandoraea sp. Y1 and B. multivorans Y4, whereas the saturates were only degraded by B. multivorans Y4. The results indicate that the No.22 consortium adapts well to different carbon sources through a change in its predominant species. This study provides some basic information regarding bioremediation using the consortium.

show abstract

“…In complex hydrocarbon mixtures, 'H NMR measurements can be used to distinguish four types of hydrogen atoms (Clutter et al, 1972). These are listed as follows with their corresponding resonance frequency ranges: (1) H, , = hydrogen attached to an aromatic carbon (G& si 6.0-9.0);…”

Section: 'H Nmr Spectroscopymentioning

confidence: 99%

Phase equilibriums for high-boiling fossil fuel distillates. 1. Characterization

Alexander¹,

Creagh²,

Prausnitz³

1985

Ind. Eng. Chem. Fund.

View full text Add to dashboard Cite

Ind. Eng. Chem. Fundam. 1985, 24, 301-310 301 debted to the Donegani Research Institute of the Montedison Co., Novara (Italy), for his yearlong visit at MIT. Appendix lations of the system parameters, eq 1-4The following equations have been used for the calcua / a d = 1.05Re0.047 We0.135 -4-4) In kAm (L/(g-mol 9)) = --13600*5 + 53.69 (A-5)log K , (g-mol/L) = --3404*7 + 14.843 -0.03279T T ( A 4 log K2 (g-mol/L) = --2902'4 + 6.498 -0.0238T (A-9) [K+] = 3.62 g-mol/L, [DEA] = 0.25[Am], [Am] = 0.238 g-mol/L, v1 = 1 cP, cr = 61 dyn/cm, p1 = 1240 kg/m3, D1 = 1.65 X cmz/s T absorber stripper units f an 0.38 0.80 2.02 x lO-'/P[atm] 2.77 Xm2/s 1.93 x 10-5 1.31 x lo-' k g i y -7 1 2 377 m -1 0.685 1.68 m C, 3.6 9.525 2 x lo-' m D , 6.35 x 10-3 Registry No. DEA, 111-42-2; COz, 124-38-9. Literature Cited Suenson, M. M.; Georgakis, C.; Evans, L. G. Ind. Eng. Chem. Fundam.,An experimental procedure is described for characterizing high-boiling, distillable fossil-fuel mixtures to facilitate estimation of thermodynamic properties for processdesign calculations. A mixture is first separated into narrow-boiling fractions by usirlg a spinning-band band column operating at low pressure and high reflux. Each fraction is considered to be a pseudocomponent of the mixture. Each pseudocomponent is characterized by structural properties per average molecule: carbon, a-hydrogen, @-hydrogen, y-hydrogen, hydroxyl, ether oxygen, primary amine, secondary amine, pyridinlc nitrogen, and thiophenic sulfur. These structural properties are obtained from elemental analysis, proton nuclear magnetic resonance spectra, infrared spectra, and cryoscopic measurements. The proposed characterization procedure is illustrated with an Exxon donor solvent product, a Lurgi creosote, five crude4 fractions from Belridge, CA, and five crude-oil fractions from Hendrick Station, TX. The molecular-structure properties obtained from characterization data are used to calculate equation-of-state constants as discussed in the following article.To design processes for high-boiling fossil-fuel feedstocks, it is necessary to estimate thermodynamic properties of such feeds. Particularly important are the equilibrium ratios (K factors) as obtained from an equation of state. Typically, three or more equation-of-state constants are required for each component, as well as binary interaction constants for each pair of components. As the number of components in a high-boiling feed is prohibitively large, it is efficient to consider the feed to be a mixture of a relatively small number of pseudocomponents. By correlating equation-of-state constants with physically significant characterization data for model compounds, it 0196-43 13/85/ 1024-0301$01.50/0 is then possible to use characterization data for pseudocomponents to obtain their equation-of-state constants. This work presents a method for obtaining such characterization data for distillable (Tb,h < 450 "C), high-boiling fossil-fuel liquids.Traditional methods of characterization are now about 50 years old. These methods...

show abstract

Nuclear magnetic resonance spectrometry of petroleum fractions. Carbon-13 and proton nuclear magnetic resonance characterizations in terms of average molecule parameters

Cited by 178 publications

References 4 publications

Structural Study of Asphaltenes from Iranian Heavy Crude Oil

Structural Study of Asphaltenes from Iranian Heavy Crude Oil

Change in the Predominant Bacteria in a Microbial Consortium Cultured on Media Containing Aromatic and Saturated Hydrocarbons as the Sole Carbon Source

Phase equilibriums for high-boiling fossil fuel distillates. 1. Characterization

Contact Info

Product

Resources

About