Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 16 of 16 for “"Vapor extraction"”.
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Asymptotic methods applied to the geoenvironmental problems of ground subsidence and soil vapor extraction
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1998.
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An analysis of air sparging/soil vapor extraction systems emphasizing volatilization kinetics in JP-4 jet fuel
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1996.
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Influence of Soil Moisture Dynamics on DNAPL Spill Zone Architecture and Its Impact on Mass Removal Mechanisms During Soil Vapor Extraction in Heterogeneous Porous Media
… the pore-scale processes that control soil vapor extraction (SVE). To test this hypothesis, a fully coupled multiphase flow and transport simulator, STOMP was chosen. STOMP was first used to develop a new conceptual model for the migration and distribution of DNAPL in heterogeneous porous …
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Design, performance, and analysis of a multi-level air permeability test
The design, performance, and analysis of a soil vapor extraction system to identify zones most conductive to air transport and quantify kair in sequential soil layers is presented. A multi-level extraction well, with alternating solid and screened sections, was utilized to characterize …
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Flow problems in air venting and air sparging
Soil Vapor Extraction (SVE) and Air Sparging have been used for site remediation for about ten years, but most of the past designs are based on experiences and numerical models. Understanding toward the physical problems is far from complete, and some simplified assumptions used in those models may …
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Simulation Study of Warm VAPEX Process Using Water-soluble Solvent
Vapor extraction (VAPEX) is considered a promising alternative to the SAGD process to recover Alberta's heavy oil and bitumen resources. In the past, researchers have found that the main drawback of the VAPEX process is its slow oil production rate due to the inherent mechanism of relatively slower …
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Mass transfer studies in heavy oil recovery using solvents
… down the viscosity of bitumen. One such method, vapor extraction (VAPEX) process uses gaseous solvents like hydrocarbon solvents and CO<sub>2</sub> to reduce bitumen viscosity. Vaporized solvents is introduced laterally to bitumen to reduce its viscosity and the less viscous bitumen drains under …
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Ultrasound Testing System for the Detecting of the Shape and Growth of a Vapor Chamber in the VAPEX Process
… acoustic waves for detection and monitoring of vapor chamber growth and pressure front movement in porous media during vapor chamber expansion in the VAPEX process. Vapor extraction is a potential nonthermal recovery process used to improve the recovery factor from heavy oil and bitumen …
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Effect of Temperature on Performance of Vapex Process for Heavy Oil
… for improving the oil drainage rate of Vapex (Vapor Extraction) in extra-heavy oil formations. This study was aimed at quantifying the upper limit of oil rates achievable with heated solvent injection. Results of the performed research can also be used to assess the applicability of Vapex to …
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A Numerical Simulation Study of the N-SolvTM Process
… recovery processes are a potential alternative. Vapor Extraction (VAPEX) and N-SolvTM are two potentially competing solvent recovery processes that offer water-free operation. Although VAPEX has demonstrated success in laboratory experiments, it has not been demonstrated to be technically or …
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Application of Polymer and Nanomaterials for Improving Heavy Oil Recovery
… instead of or combined with SAGD improves the extraction of oil from Canadian oil reservoirs. Reservoir pressure, which is a driving force for pushing oil toward production wells, reduces drastically in the early stages of oil production from underground resources. This leads to a significant …
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Computational Tools for Improved Analysis and Assessment of Groundwater Remediation Sites
… remedial technique with MNA. Excavation and soil vapor extraction when applied to the front end of a remedial action plan can decrease the amount of time to remediation and while generally more expensive than an MNA-only approach, may accrue long-term economic advantages that would otherwise be …
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Superstructure optimization of hybrid thermal desalination configurations
… the representation of numerous feed, brine and vapor routing schemes. A superstructure is developed. By adjusting the flow routings, the superstructure is capable of representing the common thermal desalination structures, as well as an extremely large number of alternate structures, some of …