E. Dendy Sloan
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View article: Site-Specific Parameterization of Ocean Spectra for Power Estimates of Wave Energy Converters
Site-Specific Parameterization of Ocean Spectra for Power Estimates of Wave Energy Converters Open
Estimating the mean annual power of a wave energy converter (WEC) through the method of bins relies on a parametric representation of all possible sea states. In practice, two-parameter spectra based on significant wave height and energy p…
View article: A qualitative exploration of barriers, enablers, and implementation strategies to replace disposable medical devices with reusable alternatives
A qualitative exploration of barriers, enablers, and implementation strategies to replace disposable medical devices with reusable alternatives Open
Hospitals use many single-use devices that produce more waste and greenhouse gas emissions than reusable devices; operating theatres alone are responsible for up to a third of hospital waste. We explored barriers and enablers to replacing …
View article: T–x diagrams for the <scp>CO<sub>2</sub>–H<sub>2</sub>O</scp> system: The importance of water content in <scp>CO<sub>2</sub></scp> transportation for carbon capture and storage
T–x diagrams for the <span>CO<sub>2</sub>–H<sub>2</sub>O</span> system: The importance of water content in <span>CO<sub>2</sub></span> transportation for carbon capture and storage Open
When water is present in a CO 2 pipeline, corrosion or plugging can occur due to the formation of liquid water or gas hydrate, respectively. Understanding how corrosion and hydrate plugging can be avoided is important for enhanced oil reco…
View article: Hydrocarbon Hydrate Flow Assurance History as a Guide to a Conceptual Model
Hydrocarbon Hydrate Flow Assurance History as a Guide to a Conceptual Model Open
This work reviews major hydrocarbon hydrate advances in flowline applications of 25 international hydrate organizations. After a review of hydrate history and the current state-of-the-art, four conclusions were drawn: (1) engineers must ta…
View article: MICROMECHANICAL ADHESION FORCE MEASUREMENTS BETWEEN CYCLOPENTANE HYDRATE PARTICLES
MICROMECHANICAL ADHESION FORCE MEASUREMENTS BETWEEN CYCLOPENTANE HYDRATE PARTICLES Open
Cyclopentane hydrate interparticle adhesion force measurements were performed in pure cyclopentane liquid using a micromechanical force apparatus. Cyclopentane hydrate adhesion force measurements were compared to those of cyclic ethers, te…
View article: IN SITU NMR MEASUREMENT OF CH4 + C2H6 HYDRATE REFORMATION
IN SITU NMR MEASUREMENT OF CH4 + C2H6 HYDRATE REFORMATION Open
The reformation of methane-ethane hydrate was observed in situ using 13C MAS NMR spectroscopy. In all reformation experiments, structure I (stable state for the reformation conditions) reformed, and the hydrate cage occupancy ratios were f…
View article: Experimental Investigation of Deposition and Wall Growth in Water Saturated Hydrocarbon Pipelines in the Absence of Free Water
Experimental Investigation of Deposition and Wall Growth in Water Saturated Hydrocarbon Pipelines in the Absence of Free Water Open
Using a combination of micromechanical force and flowloop measurements, hydrate deposition on a pipe wall surface was investigated for ‘dry’ hydrates formed in the bulk phase and for hydrates growing on the pipe surface. Cyclopentane ‘dry’…
View article: NMR studies on CH4 + CO2 binary gas hydrates dissociation behavior
NMR studies on CH4 + CO2 binary gas hydrates dissociation behavior Open
The dissociation behavior of the CH4+CO2 binary gas hydrate has been investigated using Nuclear Magnetic Resonance (NMR) spectroscopy. This technique allows us to distinguish the hydrate structure present, as well as to quantify phase conc…
View article: NEUTRON DIFFRACTION AND EPSR SIMULATIONS OF THE HYDRATION STRUCTURE AROUND PROPANE MOLECULES BEFORE AND DURING GAS HYDRATE FORMATION
NEUTRON DIFFRACTION AND EPSR SIMULATIONS OF THE HYDRATION STRUCTURE AROUND PROPANE MOLECULES BEFORE AND DURING GAS HYDRATE FORMATION Open
Fundamental understanding of the structural changes occurring during hydrate formation and inhibition is important in the development of new strategies to control hydrates in flowlines and in inhibitor design. Neutron diffraction coupled w…
View article: HYDRATE PARTICLES ADHESION FORCE MEASUREMENTS: EFFECTS OF TEMPERATURE, LOW DOSAGE INHIBITORS, AND INTERFACIAL ENERGY
HYDRATE PARTICLES ADHESION FORCE MEASUREMENTS: EFFECTS OF TEMPERATURE, LOW DOSAGE INHIBITORS, AND INTERFACIAL ENERGY Open
Micromechanical adhesion force measurements were performed on tetrahydrofuran (THF) hydrate particles in n-decane. The experiments were performed at atmospheric pressure over the temperature range 261–275 K. A scoping study characterized t…
View article: GAS HYDRATE FORMATION AND DISSOCIATION FROM WATER-IN-OIL EMULSIONS STUDIED USING PVM AND FBRM PARTICLE SIZE ANALYSIS
GAS HYDRATE FORMATION AND DISSOCIATION FROM WATER-IN-OIL EMULSIONS STUDIED USING PVM AND FBRM PARTICLE SIZE ANALYSIS Open
An understanding of the mechanism for hydrate formation from water-in-oil emulsions is integral for progressing from preventing hydrate formation through expensive thermodynamic means to hydrate blockage prevention. This work presents hydr…
View article: CLATHRATES OF HYDROGEN WITH APPLICATION TOWARDS HYDROGEN STORAGE
CLATHRATES OF HYDROGEN WITH APPLICATION TOWARDS HYDROGEN STORAGE Open
In the current work we present a significant advancement in the area of hydrogen storage in clathrates: hydrogen storage from both enclathrated molecular hydrogen as well as storage from the clathrate host lattice. We have investigated the…
View article: HYDRATE BLOCKAGE POTENTIAL IN AN OIL-DOMINATED SYSTEM STUDIED USING A FOUR INCH FLOW LOOP
HYDRATE BLOCKAGE POTENTIAL IN AN OIL-DOMINATED SYSTEM STUDIED USING A FOUR INCH FLOW LOOP Open
An understanding of the blockage potential for an oil dominated system is an important step in moving from hydrate prevention to hydrate management. To better understand this problem a series of experiments were performed by varying the wa…
View article: HYDRATE NUCLEATION MEASUREMENTS USING HIGH PRESSURE DIFFERENTIAL SCANNING CALORIMETRY
HYDRATE NUCLEATION MEASUREMENTS USING HIGH PRESSURE DIFFERENTIAL SCANNING CALORIMETRY Open
Understanding when hydrates will nucleate has notable importance in the area of flow assurance. Attempts to model hydrate formation in subsea pipelines currently requires an arbitrary assignment of a nucleation subcooling. Previous studies…
View article: A STUDY OF HYDRATE FORMATION AND DISSOCIATION FROM HIGH WATER CUT EMULSIONS AND THE IMPACT ON EMULSION INVERSION.
A STUDY OF HYDRATE FORMATION AND DISSOCIATION FROM HIGH WATER CUT EMULSIONS AND THE IMPACT ON EMULSION INVERSION. Open
Methane hydrate formation and dissociation studies from high water content (>60 vol% water) – crude oil emulsions were performed. The hydrate and emulsion system was characterized using two particle size analyzers and conductivity measurem…
View article: STANDARDIZATION AND SOFTWARE INFRASTRUCTURE FOR GAS HYDRATE DATA COMMUNICATIONS
STANDARDIZATION AND SOFTWARE INFRASTRUCTURE FOR GAS HYDRATE DATA COMMUNICATIONS Open
Gas Hydrates Markup Language (GHML) has been under development since 2003 by the CODATA Task Group “Data for Natural Gas Hydrates” as an international standard for data storage and transfer in the gas hydrates community. We describe the de…
View article: A MODELING APPROACH TO HYDRATE WALL GROWTH AND SLOUGHING IN A WATER SATURATED GAS PIPELINE
A MODELING APPROACH TO HYDRATE WALL GROWTH AND SLOUGHING IN A WATER SATURATED GAS PIPELINE Open
A hydrate plugging and formation model for oil and gas pipelines is becoming increasingly important as producers continue to push flow assurance boundaries. A key input for any hydrate plugging model is the rate of hydrate growth and the v…
View article: HYDRATE PLUG FORMATION PREDICTION TOOL – AN INCREASING NEED FOR FLOW ASSURANCE IN THE OIL INDUSTRY
HYDRATE PLUG FORMATION PREDICTION TOOL – AN INCREASING NEED FOR FLOW ASSURANCE IN THE OIL INDUSTRY Open
Hydrate plugging of hydrocarbon production conduits can cause large operational problems resulting in considerable economical losses. Modeling capabilities to predict hydrate plugging occurrences would help to improve facility design and o…
View article: RAMAN STUDIES OF METHANE-ETHANE HYDRATE STRUCTURAL TRANSITION
RAMAN STUDIES OF METHANE-ETHANE HYDRATE STRUCTURAL TRANSITION Open
The inter-conversion of methane-ethane hydrate from metastable to stable structures was studied using Raman spectroscopy. To investigate factors controlling the inter-conversion, the rate of structural transition was measured at 59% and 93…
View article: PRELIMINARY REPORT ON THE ECONOMICS OF GAS PRODUCTION FROM NATURAL GAS HYDRATES
PRELIMINARY REPORT ON THE ECONOMICS OF GAS PRODUCTION FROM NATURAL GAS HYDRATES Open
Economic studies on simulated natural gas hydrate reservoirs have been compiled to estimate the price of natural gas that may lead to economically viable production from the most promising gas hydrate accumulations. As a first estimate, la…
View article: SIMULATION OF HYDRATE AGGREGATE STRUCTURE VIA THE DISCRETE ELEMENT METHOD
SIMULATION OF HYDRATE AGGREGATE STRUCTURE VIA THE DISCRETE ELEMENT METHOD Open
As the oil industry moves from a heuristic of avoidance of hydrates to a heuristic of risk management time dependent phenomena of hydrate formation and plugging must be known. One of the key parameters to this process is the aggregation of…
View article: A NOVEL APPROACH TO MEASURING METHANE DIFFUSIVITY THROUGH A HYDRATE FILM USING DIFFERENTIAL SCANNING CALORIMETRY
A NOVEL APPROACH TO MEASURING METHANE DIFFUSIVITY THROUGH A HYDRATE FILM USING DIFFERENTIAL SCANNING CALORIMETRY Open
The avoidance of hydrate blockages in deepwater subsea tiebacks presents a major technical challenge with severe implications for production, safety and cost. The successful prediction of when and where hydrate plugs form could lead to sub…