Investigation of solids deposition from wax solvent mixtures under static, sheared, and cold flow cooling conditions

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dc.contributor.advisorMehrotra, Anil Kumar
dc.contributor.authorBidmus, Hamid
dc.date.accessioned2017-12-18T21:50:58Z
dc.date.available2017-12-18T21:50:58Z
dc.date.issued2009
dc.descriptionBibliography: p. 258-273en
dc.descriptionSome pages are in colouren
dc.description.abstractThis study presents a procedure developed to measure the liquid-deposit interface temperature during solids deposition from wax- solvent mixtures under static and sheared cooling conditions using a novel batch deposition apparatus. Batch deposition experiments were carried out with two types of multi-component waxes, using different wax concentrations, coolant temperatures, and different size of cooling surface area. All experiments showed the interface temperature throughout the deposit layer growth process was equal to the wax appearance temperature (WA T) of the liquid phase. Results from static cooling deposition experiments compared well with predictions from a mathematical model based on the moving boundary problem formulation. In addition, precipitation-filtration experiments were developed and performed on several wax solvent mixtures at temperatures below the respective WAT. The WAT of all filtrates was found to be 1-2°C less than the precipitation and filtration temperature. A novel bench-scale flow-loop apparatus was developed to investigate the role of heat transfer during deposition from wax solvent mixtures under 'cold flow' conditions. Experiments were carried out with 3 and 6 mass% wax-solvent mixtures, at different mixture flow rates, coolant temperature, and mixture temperature. The deposit mass increased with a decrease in the coolant temperature and an increase in both the wax concentration and mixture temperature. Solids deposition during 'cold flow' did not occur when the difference between the liquid-deposit interface temperature became equal to the coolant temperature. Predictions from a steady-state heat-transfer model showed good agreement with the 'cold flow' deposition experimental data.
dc.format.extentxxi, 277 leaves : ill. ; 30 cm.en
dc.identifier.citationBidmus, H. (2009). Investigation of solids deposition from wax solvent mixtures under static, sheared, and cold flow cooling conditions (Doctoral thesis, University of Calgary, Calgary, Canada). Retrieved from https://prism.ucalgary.ca. doi:10.11575/PRISM/2640en_US
dc.identifier.doihttp://dx.doi.org/10.11575/PRISM/2640
dc.identifier.urihttp://hdl.handle.net/1880/103641
dc.language.isoeng
dc.publisher.institutionUniversity of Calgaryen
dc.publisher.placeCalgaryen
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.
dc.titleInvestigation of solids deposition from wax solvent mixtures under static, sheared, and cold flow cooling conditions
dc.typedoctoral thesis
thesis.degree.disciplineChemical and Petroleum Engineering
thesis.degree.grantorUniversity of Calgary
thesis.degree.nameDoctor of Philosophy (PhD)
ucalgary.item.requestcopytrue
ucalgary.thesis.accessionTheses Collection 58.002:Box 1847 520502017
ucalgary.thesis.notesUARCen
ucalgary.thesis.uarcreleaseyen
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