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You searched for subject:(Bitumen Composition). Showing records 1 – 2 of 2 total matches.

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University of Alberta

1. Garcia, Jose Luis. Use of a solvent in the oxidative desulfurization of bitumen via autoxidation; effects on viscosity and oxidation.

Degree: MS, Department of Chemical and Materials Engineering, 2013, University of Alberta

This work describes the effect that including a solvent in the reaction media of the autoxidation of Cold Lake bitumen has on the viscosity and also on the oxidation degree reached. The comparison of viscosity was performed both in the basis of equal residence time and equal oxygen conversion showing that the solvent does not have a moderating effect on the viscosity increase of bitumen during autoxidation. Nevertheless, it is shown that the presence of a solvent greatly increases the oxidation rate. All the efforts made to oxidize sulfur compounds in bitumen are worthless if there is not a viable route to remove the oxidized species and release the sulfur as SO2. The release of SO2 from oxidized bitumen by pyrolysis and the effect on the desulfurization level reached is explored. Differential Scanning Calorimetry (DSC) was employed in the thermal analysis of reactions involving model compounds for autoxidation and pyrolysis.

Subjects/Keywords: Autoxidation; Bitumen Composition; Viscosity; ODS; SO2 release; Sulfones; HPLC; Bitumen

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Garcia, J. L. (2013). Use of a solvent in the oxidative desulfurization of bitumen via autoxidation; effects on viscosity and oxidation. (Masters Thesis). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/5h73px31c

Chicago Manual of Style (16th Edition):

Garcia, Jose Luis. “Use of a solvent in the oxidative desulfurization of bitumen via autoxidation; effects on viscosity and oxidation.” 2013. Masters Thesis, University of Alberta. Accessed November 19, 2019. https://era.library.ualberta.ca/files/5h73px31c.

MLA Handbook (7th Edition):

Garcia, Jose Luis. “Use of a solvent in the oxidative desulfurization of bitumen via autoxidation; effects on viscosity and oxidation.” 2013. Web. 19 Nov 2019.

Vancouver:

Garcia JL. Use of a solvent in the oxidative desulfurization of bitumen via autoxidation; effects on viscosity and oxidation. [Internet] [Masters thesis]. University of Alberta; 2013. [cited 2019 Nov 19]. Available from: https://era.library.ualberta.ca/files/5h73px31c.

Council of Science Editors:

Garcia JL. Use of a solvent in the oxidative desulfurization of bitumen via autoxidation; effects on viscosity and oxidation. [Masters Thesis]. University of Alberta; 2013. Available from: https://era.library.ualberta.ca/files/5h73px31c


Université de Lorraine

2. Arenas Calderon, Edward Julián. Étude de l'élaboration en continu d'émulsions de bitime [i.e.bitume] à taille de gouttes maîtrisée à l'aide de mélangeurs statiques : Study of continuous process using static mixers for the production of bitumen emulsions with controlled droplet size.

Degree: Docteur es, Génie des procédés et des produits, 2014, Université de Lorraine

Cette étude porte sur l'émulsification en continu du bitume à l'aide de mélangeurs statiques de type SMX, dans le domaine des émulsions concentrées, voire très concentrées. Ce travail suit une approche intégrant trois types de paramètres : procédé, formulation physico-chimique et composition, avec pour objectif ultime la maîtrise de la taille de gouttes. Il a été montré qu'une combinaison de fortes teneurs en bitume et de hautes températures d'émulsification favorisent l'obtention de très petites tailles de gouttes (diamètre médian inférieur ou égal à 1 µm). Cette observation contraste avec l'émulsification à forte teneur en phase dispersée en procédé discontinu. Ces résultats mettent en évidence une compétition entre les aspects énergétiques de l'émulsification et la formulation physico-chimique. Il a été mis en évidence, que lors de l'émulsification en continu à des fractions massiques en bitume supérieures à 90 %, la taille des gouttes n'est pas une fonction de l'énergie fournie mais que ce sont les paramètres de formulation qui contrôlent l'émulsification. Le suivi de la cinétique de l'émulsification et de la morphologie de l'émulsion au cours du processus d'émulsification a montré que le mécanisme d'émulsification à très fortes concentrations en bitume (90 % massique) passe par une étape d'inversion de phases catastrophique, suivie d'un affinage de l'émulsion dû aux effets de cisaillement et d'élongation lors de la phase finale de mélange. Une méthodologie basée sur une analogie de Poiseulle pour la mesure en ligne de la viscosité de procédé a été développée, permettant l'évaluation in-line du comportement rhéologique d'un fluide à travers des mesures de débit et de perte de charge

This work focuses on the continuous emulsification process (using SMX static mixers) of bitumen for concentrated and highly concentrated emulsions. This work uses an approach that integrates the process, the physic-chemical formulation and composition parameters, with the main objective of controlling the drop size of the emulsions. It was shown that the emulsification carried out at high bitumen concentrations and high temperatures favours the production of emulsions with very small droplets sizes (mean diameter ? 1 mm). This is in contrast with emulsification process in batch mode, in the same concentration and temperature conditions. These results demonstrate the competition between energy and physic-chemical formulation aspects. It was also revealed that when continuous emulsification is carried out at 90 % wt. of bitumen, droplet sizes are not a function of the energy provided and, hence, the emulsification process is controlled by the formulation parameters. Morphological analyzes, coupled with kinetics of emulsification obtained by in-situ monitoring of the viscosity, allowed the description of the mechanisms occurring during the emulsification at high internal phase ratio. It was possible to identify two principal steps in the mechanism: a catastrophic phase inversion followed by a droplet reduction by agitation, the…

Advisors/Committee Members: Choplin, Lionel (thesis director), Sadtler, Véronique (thesis director).

Subjects/Keywords: Émulsions de bitume; Mélangeurs statiques; Formulation/composition; Bitumen emulsions; Static mixers; Formulation/composition; 625.85

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Arenas Calderon, E. J. (2014). Étude de l'élaboration en continu d'émulsions de bitime [i.e.bitume] à taille de gouttes maîtrisée à l'aide de mélangeurs statiques : Study of continuous process using static mixers for the production of bitumen emulsions with controlled droplet size. (Doctoral Dissertation). Université de Lorraine. Retrieved from http://www.theses.fr/2014LORR0050

Chicago Manual of Style (16th Edition):

Arenas Calderon, Edward Julián. “Étude de l'élaboration en continu d'émulsions de bitime [i.e.bitume] à taille de gouttes maîtrisée à l'aide de mélangeurs statiques : Study of continuous process using static mixers for the production of bitumen emulsions with controlled droplet size.” 2014. Doctoral Dissertation, Université de Lorraine. Accessed November 19, 2019. http://www.theses.fr/2014LORR0050.

MLA Handbook (7th Edition):

Arenas Calderon, Edward Julián. “Étude de l'élaboration en continu d'émulsions de bitime [i.e.bitume] à taille de gouttes maîtrisée à l'aide de mélangeurs statiques : Study of continuous process using static mixers for the production of bitumen emulsions with controlled droplet size.” 2014. Web. 19 Nov 2019.

Vancouver:

Arenas Calderon EJ. Étude de l'élaboration en continu d'émulsions de bitime [i.e.bitume] à taille de gouttes maîtrisée à l'aide de mélangeurs statiques : Study of continuous process using static mixers for the production of bitumen emulsions with controlled droplet size. [Internet] [Doctoral dissertation]. Université de Lorraine; 2014. [cited 2019 Nov 19]. Available from: http://www.theses.fr/2014LORR0050.

Council of Science Editors:

Arenas Calderon EJ. Étude de l'élaboration en continu d'émulsions de bitime [i.e.bitume] à taille de gouttes maîtrisée à l'aide de mélangeurs statiques : Study of continuous process using static mixers for the production of bitumen emulsions with controlled droplet size. [Doctoral Dissertation]. Université de Lorraine; 2014. Available from: http://www.theses.fr/2014LORR0050

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