Notice bibliographique
Résumé
Interfacial activity of SAGD PW endogenous surfactants, humic acids (HAs), and their interaction dynamics with naphtha-diluted Alberta oil sand bitumen (AOSB) present in model SAGD produced water has been addressed in the first part of this PhD thesis. Dynamic interfacial tension σ(t) between oil and water phases has been studied using a pendant drop tensiometer in the first part of this PhD thesis and its correlation to the properties of SAGD PW has been further investigated. The effect of AOSB dilution ratios, pH of model SAGD PW and surfactant concentrations on the dynamic interfacial tension (IFT) of naphtha-diluted bitumen/water interface has been monitored. A theoretical model of surfactant adsorption at the interface of naphtha-diluted bitumen/model SAGD produced water has been applied to the experimental curves. In the next part of this PhD thesis, the oil/water (O/W) interface at nano-scale has been studied using a thin liquid film (TLF) set up. The interface of O/W has been monitored for different aqueous phases of surfactant solutions and ionic liquids. Later, a systematic study of TLF of n-dodecane as an intervening liquid phase in aqueous surfactant solution is performed using a 3D-printed modified Scheludko-cell (MSC). The effect of the ionic strength of the ionic liquid (IL) phase on the current–voltage characteristic curve of the system is monitored. It is found that TLF conductivity increases as the ionic strength of the IL phase increases. Moreover, the transient study of the TLF conductivity showed that the TLF conductivity increases over time until it reaches to a quasi-steady condition. We obtained an induced conductivity for the TLF formed for two cases of SDS as anionic surfactants and KCl as inorganic hydrophilic ions. We later developed a model for the adsorption of the ionic species at the perfect dielectric liquid (PDL)/IL interface in both cases of the anionic surfactants and inorganic hydrophilic ions. In order to rule out the charge leakage effect within oil phase in the observed increase in the TLF conductivity, the oil film conductivity without the presence of any aqueous phase is measured under the current experimental conditions. The electric field applied to the TLF is also quantified by simultaneously solving the non-linear Poisson-Boltzmann equation for IL phase and Laplace equation for the PDL phase. Either studies rule out the evidence of charge leakage within the oil phase under the current experimental conditions. The validity of the surfactants adsorption at O/W interface is also examined by utilizing the pendant drop tensiometric study of the oil phase in aqueous solution. The adsorption time-scale of surfactants present in IL phase at O/W interface using this method was comparable to the electrical conductivity measurement done by MSC. In the last part of this PhD thesis work, a theoretical model has been developed to study the O/W interface electric potential at different applied voltages to the TLF. We anticipate that the results of this study will bring about a better understanding of the interfacial film properties leading to the advancement of the design of the next generation SAGD W/O or O/W emulsion separation unit operations and the furtherance of the prediction of the coalescence mechanism in SAGD PW emulsions.
Récupéré en direct depuis OpenAlex et désinversé. Les résumés ne sont pas conservés dans cette base de données : les index inversés représentent 8,6 Go des 9,3 Go de texte de la base, et le serveur dispose de 13 Go libres.
Comment cette classification a été obtenuedéplier
Prédiction distillée sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Apprise à partir de 10 348 étiquettes directes de Codex et de 10 348 étiquettes directes de Gemma. Le mode candidate est l'union des têtes enseignantes seuillées; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont ni des étiquettes humaines ni des étiquettes directes de modèles de pointe.
Scores Codex et Gemma par catégorie
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,000 | 0,000 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,000 | 0,000 |
| Bibliométrie | 0,000 | 0,000 |
| Études des sciences et des technologies | 0,000 | 0,000 |
| Communication savante | 0,000 | 0,000 |
| Science ouverte | 0,000 | 0,000 |
| Intégrité de la recherche | 0,000 | 0,000 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,000 | 0,000 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découleClassification
machine, non validéePrédiction automatique; un appel candidat d’une seule tête enseignante, pas un consensus.
Le détail, modèle par modèle et score par score, se trouve en fin de page sous « Comment cette classification a été obtenue ».