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.
Results
Showing 1 to 20 of 35 for “"Hydrate formation"”.
-
Hydrate Formation Using Dowfax Gemini Surfactants
"Gas hydrate formation is a stochastic and slow process. However, the use of a small amount of surfactant can speed up the rate of hydrate formation. This work investigates the effect of two Dow surfactants, Dowfax 2A1 and Dowfax C6L, on gas hydrate formation, first by determining the adsorption …
-
Viscosity study of kinetics of hydrate formation, A
Includes bibliographical references.
-
Hydrate formation and adhesion on low surface energy materials
Clathrate hydrates are ice-like solid substances that often form inside oil and gas pipelines and are responsible for flow blockages, sometimes leading to catastrophic disasters. Minimizing hydrate adhesion and accumulation of solids on pipelines can effectively address this problem. In this …
-
Experimental and computer study of gas hydrate formation and inhibition, An
Includes bibliographical references (pages 128-132).
-
Desalination of Produced Water via Gas Hydrate Formation and Post Treatment
… which produced water is cleaned by forming gas hydrate in it and subsequently dewatering the hydrate to remove the residual produced water trapped in between the hydrate crystals. All experiments were performed with pressure in the range of 450 to 800psi and temperature in the range of -1 to 1°C …
-
Experimental investigation of sodium surfactin as potential methane-water hydrate formation inhibitor
… as surfactants in these operations, including hydrate formation prevention and control. Surfactants usage in oil and gas processes stem from their tensioactive capabilities. However, dosage and environmental compatibility continue to be an issue arising from the use of these chemical …
-
Investigation of glucose hydrate formation and loss: Parameters, mechanisms, and physical stability
… either α-anhydrous glucose (α-AG) or glucose monohydrate (GM). The β-anhydrous glucose (β-AG) form is also possible, but is more difficult to crystallize and not sold as an ingredient. Conversion between the anhydrous and monohydrate structure may occur during long-term storage, however, hydrate …
-
Post combustion capture of carbon dioxide through hydrate formation in silica gel column
Carbon dioxide CO₂capture through hydrate formation is a novel technology under consideration as an efficient means of separating CO₂from flue/fuel gas mixtures for sequestration and enhanced oil recovery operations. This thesis examines post-combustion capture of CO₂from fossil-fuel power plant …
-
Multi-scale Analysis of Methane Gas Hydrate Formation and Dissociation via Point Source Thermal Stimulation and Carbon Dioxide Exchange
The formation and dissociation of methane gas hydrate was investigated over a range of laboratory scale systems with sample volumes of 1.3 cm3, 0.059 m3 and 0.141 m3. Three unique hydrate apparatuses were used to study a point source thermal dissociation method in which gas production profiles and …
-
Effect of Sediment Composition on the Uniformity of Experimentally-Formed Methane Hydrate
… that try to duplicate the methane hydrate found in natural systems have regularly made non-uniform hydrate in packed sediments. Some element of the natural system is missing from the experimental procedure. The goal of this research was to discover what role sediment composition and …
-
Probing Nucleation Mechanisms of Gas Hydrates via Molecular Simulations
Gas hydrates are ice-like solids where guest species can be encapsulated in water cages. Gas hydrates have received considerable attention because of the vast natural methane hydrates and various promising hydrate-based technologies. Relevant to the applications, a fundamental molecular-level …
-
Multiphase flow modeling and deposition of hydrates in oil and gas pipelines
… multiphase flow. The risk of plugging due to gas hydrate formation remains one of the most prevailing flow-assurance problems in deepwater subsea oil and gas operations. Due to the potentially severe economic impact of forming a gas hydrate plug, it is critical to develop gas hydrate formation …
-
LARGE-EDDY SIMULATION OF DEEP-WATER HYDROCARBON PLUME DYNAMICS
… diameter, the local gas dissolution rate and hydrate formation/decomposition rate and bubble rise velocity are parameterized, which are then used in the gas transport equations to model the evolution of the gas bubble field due to turbulent transport and gas dissolution and hydrate formation …
-
Experimental Studies on the Geomechanical Behavior and Heterogeneity in Laboratory Synthesized Hydrate-bearing Sands
Hydrate-bearing sands (HBS) store large volumes of methane gas, and along with their potential to be commercially exploited using current oil and gas production techniques, make them suitable as a future energy resource. When hydrates form in the pore space of a sediment, they significantly …
-
Stability of Methane-Ethane-Propane Mixed Gas Hydrates under Deep Water Conditions
Methane hydrates are globally distributed in sediments along the continental margins and potentially contain more energy than all fossil fuel reserves. However, methane is also a potential greenhouse gas which could play a major role in global climate change. Understanding the stability of gas …
-
Methane storage and transport via structure H clathrate hydrate
… thesis examines the prospect of structure H (sH) hydrate to be exploited for methane storage. The methane content in the hydrate, hydrate kinetics and conversion rates are areas of particular importance. Experiments and theory are employed at the macroscopic and molecular levels to study the …
-
Impact of Hydrate Dissociation on the Stiffness and Strength of Hydrate Bearing Sands
… energy resources, notably natural gas hydrates. These ice-like compounds, abundant in permafrost and marine sediments, harbor vast quantities of methane, a potent energy source. However, conventional methods for recovering methane gas from natural hydrate bearing sand (HBS) deposits …
-
Carbon dioxide hydrates for carbon capture, utilization, and storage
… low temperatures (subsea or via JT cooling), gas hydrate formation must be considered. Carbon dioxide fluid properties at hydrate forming conditions will be important moving forward with CCUS. In order to better characterize nearly pure carbon dioxide streams for CCUS, the water content of carbon …
-
Development of hydrate risk quantification in oil and gas production
… facility face issues from solid deposits such as hydrates, waxes, asphaltenes, etc. The solid deposits not only affect the production but also pose a safety concern; thus, flow assurance is significantly important in designing and operating subsea oil and gas production. In most subsea oil and gas …
Page 1 of 2