Kinetics of Gas Hydrate Formation and Dissociation

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dc.contributor.advisorSharma, Mukul Mani
dc.creatorSchmitt, Alexander David
dc.date.accessioned2020-04-21T03:19:47Z
dc.date.available2020-04-21T03:19:47Z
dc.date.issued2008-08
dc.description.abstractA consistent method was developed to monitor the rate of formation and dissociation of hydrates. The method consisted of monitoring pressure and temperature over time, and visually documenting the presence of hydrates inside a fixed volume high pressure cell and extracting hydrate samples from the cell. The effect of various types and concentrations of surfactants and foaming agents on the formation and dissociation of gas hydrates was investigated. The surfactants tested were sodium dodecyl sulfate, cetyl trimethyl ammonium bromide (CTAB) and Aerosol AY. Foaming appeared to have a limited effect on the rate of hydrate formation. Some surfactants appeared to significantly increase the rate of hydrate formation and decrease nucleation time. This would be beneficial in any process that required purposefully producing gas hydrates. Hydrates produced with surfactants were much more homogeneous than those formed with gas and water alone, and appeared to grow from the edge of the cell inwards rather than randomly. Two surfactants, CTAB and Aerosol AY, appeared to act as hydrate inhibitors at relatively low concentrations, suggesting they could be used to prevent hydrate formation in pipes and equipment. Hydrate nucleation time appeared to be a stochastic process, and there was no significant evidence that trials with numerous “freeze periods” had decreased nucleation time, or significantly altered hydrate formation.en_US
dc.description.departmentPetroleum and Geosystems Engineeringen_US
dc.format.mediumelectronicen_US
dc.identifier.urihttps://hdl.handle.net/2152/80751
dc.identifier.urihttp://dx.doi.org/10.26153/tsw/7766
dc.language.isoengen_US
dc.relation.ispartofUT Electronic Theses and Dissertationsen_US
dc.rightsCopyright © is held by the author. Presentation of this material on the Libraries' web site by University Libraries, The University of Texas at Austin was made possible under a limited license grant from the author who has retained all copyrights in the works.en_US
dc.rights.restrictionRestricteden_US
dc.subjectGas hydrate formationen_US
dc.subjectHydratesen_US
dc.titleKinetics of Gas Hydrate Formation and Dissociationen_US
dc.typeThesisen_US
dc.type.genreThesisen_US
thesis.degree.departmentPetroleum and Geosystems Engineeringen_US
thesis.degree.disciplinePetroleum Engineeringen_US
thesis.degree.grantorUniversity of Texas at Austinen_US
thesis.degree.levelMastersen_US
thesis.degree.nameMasters of Science in Engineeringen_US

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