Characterization of Algerian Hassi-Messaoud asphaltene structure using Raman spectrometry and X-ray diffraction

Bouhadda, Y.; Bormann, D.; Sheu, Eric Y.; Bendedouch, Dalila; Krallafa, A.; Daaou, Mortada

doi:10.1016/j.fuel.2006.12.006

Cited by 174 publications

(167 citation statements)

References 27 publications

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“…Detailed examination of asphaltene characterization by Raman spectroscopy (Bouhadda et al, 2007) suggested that G mode peak is much similar to the one seen in commercial carbon black. This similarity does not systematically indicate that molecules are accumulated like a graphite crystal structure but it allows us to use similar analysis, especially about the Tuinstra and Koenig equation as long as the G mode is within the correct range.…”

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confidence: 78%

“…Rigolio et al discussed that a large aromatic sheet with multiple rings may have a high aromaticity (Rigolio et al, 2001). This itself shows in Raman spectroscopy as a reduction in D1 intensity and a shift of G band to low frequencies, also it is reported that the position of the D band and the ratio of G/D band intensity alters with covalent modification of the graphite sheet (Bouhadda et al, 2007). Table 2 compares the fitting parameters derived from equation (2) for samples A and B.…”

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confidence: 79%

“…and 900-1800 cm À1 region are shown in Figures 2 and 3, respectively (Bouhadda et al, 2007). Since one of the aims of this work is to follow up changing asphaltene's molecule in presence of aluminum oxide nanoparticles, the aggregate structure of asphaltene should be considered.…”

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confidence: 99%

“…Consequently, microcrystalline planar crystal size L a was determined. L a is obtained by integrated intensities (areas) of the D1 and G bands (I D and I G , respectively) (Bouhadda et al, 2007):…”

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confidence: 99%

“…This similarity does not systematically indicate that molecules are accumulated like a graphite crystal structure but it allows us to use similar analysis, especially about the Tuinstra and Koenig equation as long as the G mode is within the correct range. Since G mode observed is near 1600 cm À1 the Tuinstra and Koenig equation is applicable here (Bouhadda et al, 2007).…”

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confidence: 99%

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Aluminum Oxide Nanoparticles for Highly Efficient Asphaltene Separation from Crude Oil Using Ceramic Membrane Technology

Rezakazemi

Mirzaei

Asghari

et al. 2017

Oil & Gas Science and Technology - Rev. IFP Energies nouvel

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-The effects of aluminum oxide nanoparticles on the removal of asphaltenes from an Iranian crude oil (Soroush) using a ceramic membrane with pore size of 0.2 mm were investigated. In order to achieve superior asphaltene separation by ultrafiltration, it is essential to make some changes for destabilizing asphaltene in crude oil. The asphaltene destabilization was done using crude oil contact with an acid containing dissolved metal ions. Metal oxide nanoparticles adsorbed asphaltene molecules and increased their molecular size. The nanoparticle of aluminum oxide was applied to alter precipitation and peptization properties of asphaltenes. Dynamic Light Scattering (DLS) was used to measurement of the asphaltene molecular size dissolved in toluene. Raman spectroscopy and the Tuinstra equation were used to determine the aromatic sheet diameter (L a ) via the integrated intensities of the G and D1 modes. This revealed that the asphaltene particles react with nano aluminum oxide and the average molecular size of asphaltene was raised from 512.754 to 2949.557 nm and L a from 5.482 to 13.787. The obtained results showed that using nano aluminum oxides, asphaltene separation increased from 60-85 wt% to 90-97 wt% based on the asphaltene content of crude oil.

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confidence: 78%

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confidence: 79%

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confidence: 99%

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confidence: 99%

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confidence: 99%

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Aluminum Oxide Nanoparticles for Highly Efficient Asphaltene Separation from Crude Oil Using Ceramic Membrane Technology

Rezakazemi

Mirzaei

Asghari

et al. 2017

Oil & Gas Science and Technology - Rev. IFP Energies nouvel

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Polycyclic aromatic hydrocarbons (PAHs) adsorption on solid surfaces applied to waste lubricant oils recovery process

2010

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Lubricant oils undergo degradation increasing polycyclic aromatic hydrocarbons (PAHs) concentration. In this work, PAHs adsorption onto activated carbon, powder silica, and powder chitosan surfaces was estimated, with their concentrations in organic solvents (ethanol, 2-propanol, 1-butanol, and terc-butanol) monitored by UV-visible absorption. Equilibrium concentration was attained after 72 h and the isotherms presented characteristic of multilayer formation. The greater surface density was determined for the chitosan, but the system containing activated carbon and 1-butanol presented better efficiency for PAHs removal. Results indicated that the adsorption evaluated in this work can be a potential stage in the waste lubricant oils global recovery process.Les huiles de lubrification subissent une dégradation augmentant la concentration d'hydrocarbures aromatiques polycycliques (HAP). Dans ce travail, on a estimé l'adsorption de HAPs sur du carbone activé, de la silice en poudre et des surfaces de chitosane en poudre, leurs concentrations dans des solvants organiques (éthanol, 2-propanol, 1-butanol et terc-butanol)étant suivies par absorption UV et dans le domaine visible. Une concentration d'équilibre aété atteinte après 72 h et les isothermes présentaient des caractéristiques de formation de couches multiples. La densité de surface la plus importante aété déterminée pour le chitosane mais le système contenant du carbone activé et du 1-butanol présentait une meilleure efficience en matière de retrait des HAPs. Les résultats indiquaient que l'adsorptionévaluée dans ce travail pourrait constituer uneétape potentielle du processus global de récupération des résidus d'huiles de lubrification.

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Determination of asphaltene structural parameters by Raman spectroscopy

AlHumaidan

Rana

2021

J Raman Spectroscopy

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The objective of this study is to determine the aromatic sheet diameter (L a ) and the number of aromatic sheets per stack (n) for asphaltene molecules from Raman spectra by investigating and optimizing empirical equations proposed in the literature for both crystalline and amorphous carbon materials. The results clearly indicated that the best empirical equation for determining the aromatic sheet diameter for asphaltene was the equation proposed by Tuinstra and Koenig, but only when the graphitization indicator I D /I G would have been determined from the peak integrated ratio, rather than from the peak intensity ratio. The best results of L a were obtained when the Raman spectra were deconvoluted and fitted with three peaks using Gaussian function. The number of aromatic sheets per stack for asphaltene was also determined by examining various empirical equations proposed for crystalline carbon materials. The results indicated that these equations could be applied on asphaltene if the first-order region of Raman spectrum were to be fitted with two peaks, representing the G and D bands. Fitting the spectra with more peaks could result in splitting the G band into two bands (i.e., G and D2 bands), which would shift the G-band position to a wavenumber below 1581.6 cm À1 , and, subsequently, prevent the utilization of these empirical equations.

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Characterization of Algerian Hassi-Messaoud asphaltene structure using Raman spectrometry and X-ray diffraction

Cited by 174 publications

References 27 publications

Aluminum Oxide Nanoparticles for Highly Efficient Asphaltene Separation from Crude Oil Using Ceramic Membrane Technology

Aluminum Oxide Nanoparticles for Highly Efficient Asphaltene Separation from Crude Oil Using Ceramic Membrane Technology

Polycyclic aromatic hydrocarbons (PAHs) adsorption on solid surfaces applied to waste lubricant oils recovery process

Determination of asphaltene structural parameters by Raman spectroscopy

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