Experimental Measurement of Diffusion Coefficient of Gaseous Solvents in Liquids

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dc.contributor.advisorAbedi, Jalal
dc.contributor.advisorHassanzadeh, Hassan
dc.contributor.authorKhalifi, Mohammad
dc.contributor.committeememberMoore, Robert Gordon
dc.contributor.committeememberMehta, Sudarshan
dc.contributor.committeememberZhang, Yan
dc.contributor.committeememberJohansen, Craig
dc.contributor.committeememberHejazi, Hossein
dc.date2021-06
dc.date.accessioned2021-05-14T22:05:47Z
dc.date.available2021-05-14T22:05:47Z
dc.date.issued2021-05-12
dc.description.abstractThe molecular diffusion coefficient is an important transport property used for modeling the diffusional mass transfer in many processes. In enhanced oil recovery from oil sands, molecular diffusion contributes to the mixing in the solvent-aided oil recovery techniques, and therefore, needs to be effectively captured for the successful modeling and performance prediction of the process. Despite the importance of diffusion coefficient in various engineering applications, there is an evident gap in the amount and quality of the diffusivity data available in the literature. This may be due to the complex nature of experimental measurements as well as the difficulties associated with analyzing the experimental data. In this study, a robust and reliable approach is developed for diffusivity measurement in systems of gaseous solvents and liquids. The developed methodology uses an analytical solution to the constant-pressure one-dimensional diffusion problem utilizing both the rate of gas dissolution and movement of the gas/liquid interface to estimate the molecular diffusivity coefficient. Moreover, a series of experimental setups have been designed, fabricated, and validated to maximize the accuracy of the experiments while satisfying the precision requirements for diffusivity measurements in systems of low soluble gases and liquids. The developed methodology was used to report the first datasets on diffusion coefficients of gaseous ethane in toluene and gaseous dimethyl ether in Athabasca bitumen and water. Also, an experimental method has been developed to measure the concentration dependency of the molecular diffusion coefficient of gases in liquids. The results indicated that the diffusion coefficient increases with the increase in test temperature. The pressure dependency, however, was explained by the effect of higher solvent concentration on the viscosity of the liquid mixture. Generally, lower viscosity at the diffusive boundary layer between gas and liquid resulted in higher diffusion coefficients. The developed methodology and the reported data have applications in the design and evaluation of solvent injection processes for heavy oil recovery.en_US
dc.identifier.citationKhalifi, M. (2021). Experimental Measurement of Diffusion Coefficient of Gaseous Solvents in Liquids (Doctoral thesis, University of Calgary, Calgary, Canada). Retrieved from https://prism.ucalgary.ca.en_US
dc.identifier.doihttp://dx.doi.org/10.11575/PRISM/38865
dc.identifier.urihttp://hdl.handle.net/1880/113411
dc.language.isoengen_US
dc.publisher.facultySchulich School of Engineeringen_US
dc.publisher.institutionUniversity of Calgaryen
dc.rightsUniversity of Calgary graduate students retain copyright ownership and moral rights for their thesis. You may use this material in any way that is permitted by the Copyright Act or through licensing that has been assigned to the document. For uses that are not allowable under copyright legislation or licensing, you are required to seek permission.en_US
dc.subjectDiffusion Coefficienten_US
dc.subjectMass-transferen_US
dc.subjectSolvent-aided Bitumen Recoveryen_US
dc.subjectDimethyl Etheren_US
dc.subjectSAGDen_US
dc.subject.classificationEngineering--Chemicalen_US
dc.subject.classificationEngineering--Petroleumen_US
dc.titleExperimental Measurement of Diffusion Coefficient of Gaseous Solvents in Liquidsen_US
dc.typedoctoral thesisen_US
thesis.degree.disciplineEngineering – Chemical & Petroleumen_US
thesis.degree.grantorUniversity of Calgaryen_US
thesis.degree.nameDoctor of Philosophy (PhD)en_US
ucalgary.item.requestcopytrueen_US
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