Estimation of average structural parameters of bitumens by 13C nuclear magnetic resonance spectroscopy

Michon, Laurent C.; Martin, Didier; Planche, Jean‐Pascal; Hanquet, Bernard

doi:10.1016/s0016-2361(96)00184-6

Cited by 64 publications

(69 citation statements)

References 9 publications

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“…They usually gather the traces of transition metals of the whole bitumen, from a few ppm up to a few tenth of wt.% of Ni, Va, Fe,..., in the form of complexes such as metallo-porphyrins [26]. Ultra-Violet fluorescence [41,54], FTIR [41,55], X-Ray Raman spectroscopy [56] and Nuclear Magnetic Resonance [55,57,58] show that they contain fused aromatic rings, with a most probable structure corresponding to 4-10 fused rings, causing a maximum UV-fluorescence around 450 nm [54], together with some pending aliphatic chains. Average molecular structures for asphaltenes have been published [46,52,59,60], examples of which are reproduced in Fig.…”

Section: Asphaltenesmentioning

confidence: 99%

The colloidal structure of bitumen: Consequences on the rheology and on the mechanisms of bitumen modification

Lesueur¹

2009

Advances in Colloid and Interface Science

1,328

710

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Section: Asphaltenesmentioning

confidence: 99%

The colloidal structure of bitumen: Consequences on the rheology and on the mechanisms of bitumen modification

Lesueur¹

2009

Advances in Colloid and Interface Science

1,328

710

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“…These methods are rather slow, elaborate, and expensive, requiring large sample amounts of the crude to be sent to the laboratory. As a fast and viable alternative, spectroscopic methods such as nuclear magnetic resonance (NMR), [4][5][6][7][8][9][10][11] Raman, 12,13 infrared (IR), [14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31] and near infrared (NIR) 24,25 have been proposed, since the corresponding spectra reflect the complete molecular composition of the crude oil. 26 Particularly, when combined with chemometric modeling techniques, [27][28][29] it might be possible to classify crude oils in terms of suitability for bitumen manufacture from their spectra.…”

Section: Introductionmentioning

confidence: 99%

Prediction of Long and Short Residue Properties of Crude Oils from Their Infrared and Near-Infrared Spectra

et al. 2008

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Research has been carried out to determine the feasibility of chemometric modeling of infrared (IR) and near-infrared (NIR) spectra of crude oils to predict the long residue (LR) and short residue (SR) properties of these samples. A novel method is described to predict short residue properties at different flashing temperatures based on the IR spectrum of a crude oil measured at room temperature. The resulting method is the subject of European patent application number 07251853.3 filed by Shell Internationale Research Maatschappij B.V. The study has been carried out on 47 crude oils and 4 blends, representing a large variety of physical and chemical properties. From this set, 28 representative samples were selected by principle component analysis (PCA) and used for calibration. The remaining 23 samples were used as a test set to validate the obtained partial least squares (PLS) regression models. The results demonstrate that this integrated approach offers a fast and viable alternative for the currently applied elaborate ASTM (American Society for Testing and Materials) and IP (Institute of Petroleum) methods. IR spectra, in particular, were found to be a useful input for the prediction of different LR properties. Root mean square error of prediction values of the same order of magnitude as the reproducibility values of the ASTM methods were obtained for yield long on crude (YLC), density (D LR ), viscosity (V LR ), and pour point (PP) , while the ability to predict the sulfur contents (S) and the carbon residue (CR) was found to be useful for indicative purposes. The prediction of SR properties is also promising. Modeling of the IR spectra, and to a lesser extent, the NIR spectra as a function of the average flash temperature (AFT) was particularly successful for the prediction of the short residue properties density (D SR ) and viscosity (V SR ). Similar results were obtained from the models to predict SR properties as a function of the yield short on crude (YSC) values. Finally, it was concluded that the applied protocol including sample pretreatment and instrumental measurement is highly reproducible and instrument and accessory independent.

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“…Thus the study of the chemical composition in understanding and effect of modification on the chemical fractions present before and after modification is important to know [4]. The evolution of chemical structure because of modification usually enhances the mechanical strength of binder and ultimately the modified bituminous mix [5].…”

Section: Introductionmentioning

confidence: 99%

Investigation on the effect of phase segregation on the mechanical properties of polymer modified bitumen using analytical and morphological tools

et al. 2017

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Abstract. The mechanical strength of polymer modified bituminous mix which is evaluated in terms of stiffness reflects the deformation behaviour of bituminous mixture. The stiffness of the binder strongly depends on its chemical composition besides aggregate structure of the bituminous mixture. Compatibility of polymer with the base bitumen is considered as major strength enhancing factor in the case of polymer modified bituminous mix. To relate the factors affecting the mechanical strength of the binder a new approach in this research study was adopted in order to relate the compatibility of 80/100 pen bitumen with polymer Polypropylene (PP) using analytical and morphological tools. Morphological tools like Atomic Force Microscopy (AFM) and Transmission Electron Microscope (TEM) were used to study the changes due to the difference in compatibility of polymer with bitumen. It was observed that the presence of phase segregated layer as observed by AFM surface morphology was considered as the main strength enhancing factor of the bituminous mix. While the presence of lamella as observed in TEM scanned images of PP PMB revealed that addition of polymer forms localized network in the phase segregated layer which induces the stiffening effect in PMB. From the chromatographic method (SARA) analytical analysis Saturate, Aromatics, Resin and Asphaltene fractionate were determined in the blend. It was observed that chemical composition of the blend also has a profound effect on the rheological properties and on the morphology of polymer modified bituminous (PMB) blend. It was concluded that PP PMB gets benefited by phase segregated layer in the blend when the polymer concentration was kept below 3% as it sufficiently enhances the mechanical strength of the PMB binder as observed by dynamic creep results.

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Estimation of average structural parameters of bitumens by 13C nuclear magnetic resonance spectroscopy

Cited by 64 publications

References 9 publications

The colloidal structure of bitumen: Consequences on the rheology and on the mechanisms of bitumen modification

The colloidal structure of bitumen: Consequences on the rheology and on the mechanisms of bitumen modification

Prediction of Long and Short Residue Properties of Crude Oils from Their Infrared and Near-Infrared Spectra

Investigation on the effect of phase segregation on the mechanical properties of polymer modified bitumen using analytical and morphological tools

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