A5020511211- Methane Hydrates and Related Phenomena
- Hydrocarbon exploration and reservoir analysis
- Atmospheric and Environmental Gas Dynamics
- CO2 Sequestration and Geologic Interactions
- Spacecraft and Cryogenic Technologies
- Hydraulic Fracturing and Reservoir Analysis
- Seismic Imaging and Inversion Techniques
- Global trade and economics
- Groundwater flow and contamination studies
- Reservoir Engineering and Simulation Methods
- Enhanced Oil Recovery Techniques
- Carbon Dioxide Capture Technologies
- Coal Properties and Utilization
- Turbomachinery Performance and Optimization
- World Trade Organization Law
- International Environmental Law and Policies
- Refrigeration and Air Conditioning Technologies
- Industrial Gas Emission Control
- Control and Dynamics of Mobile Robots
- Robotic Path Planning Algorithms
- Tribology and Lubrication Engineering
- Quantum, superfluid, helium dynamics
- Cyclone Separators and Fluid Dynamics
- Healthcare Education and Workforce Issues
- Network Security and Intrusion Detection
Korea Institute of Geoscience and Mineral Resources
2014-2024
Hanwha Solutions (South Korea)
2021
Sungkyunkwan University
2019
Korea Health Personnel Licensing Examination Institute
2018
Korea University
2013
Korea Advanced Institute of Science and Technology
2006-2010
Changwon National University
2010
Kongju National University
2010
Korea Institute of Energy Research
2009
Seoul National University
1999-2003
Large amounts of CH 4 in the form solid hydrates are stored on continental margins and permafrost regions. If these could be converted into CO 2 hydrates, they would serve double duty as sources storage sites. We explore here swapping phenomenon occurring structure I (sI) II (sII) hydrate deposits through spectroscopic analyses its potential application to sequestration at preliminary phase. The present 85% recovery rate sI achieved by direct use binary N + guests is surprising when compared...
The methane (CH4) – carbon dioxide (CO2) swapping phenomenon in naturally occurring gas hydrates is regarded as an attractive method of CO2 sequestration and CH4 recovery. In this study, a high pressure microdifferential scanning calorimeter (HP μ-DSC) was used to monitor quantify the replacement hydrate structure. HP μ-DSC provided reliable measurements dissociation equilibrium heat for pure mixed hydrates. data obtained from endothermic thermograms replaced indicate that at least 60%...
In this study, guest gas enclathration behavior in semiclathrates of tetra-n-butylammonium bromide (TBAB) was closely investigated through phase equilibrium measurement and spectroscopic analysis. The three-phase equilibria semiclathrate (H), liquid water (L(W)), vapor (V) for the ternary CH(4) + TBAB CO(2) mixtures with various concentrations were experimentally measured to determine stability conditions double semiclathrates. Equilibrium dissociation temperatures pure also at same under...
The direct recovery of methane from gas hydrate‐bearing sediments is demonstrated, where a gaseous mixture CO 2 + N used to trigger replacement reaction in complex phase surroundings. A one‐dimensional high‐pressure reactor (8 m) was designed test the actual aspects occurring natural hydrate (NGH) reservoir conditions. NGH can be converted into by “replacement mechanism,” which serves double duty as means both sustainable energy source extraction and greenhouse sequestration. efficiency...
On the basis of crystallographic analysis results, a recent study reported that structure H (sH) hydrate exists in natural environment, providing direct evidence from samples recovered Barkley canyon, on northern Cascadia margin. It was further indicated sH is more stable than sI and may thus potentially be found wider pressure−temperature regime are methane deposits. Accordingly, it worthwhile to examine whether swapping process can spontaneously occur between gaseous CO2/(N2 + CO2)...
Smectite clays are widely dispersed in deep ocean sediments and can be subdivided into two representative clay types, Cheto- Wyoming-montmorillonites. In this study, we measured the thermodynamic phase behavior of methane hydrates intercalated at various concentrations these found relatively weak promotion tendency when compared to that pure hydrate stability. The structure morphology (IMH) samples were analyzed using MAS NMR, RAMAN, LT-XRD, Cryo-FE-SEM. 27Al 29Si solid-state NMR spectra IMH...
Natural methane hydrates occurring in marine clay sediments exhibit heterogeneous phase behavior with high complexity, particularly the negatively charged interlayer region. To date, real effect on natural hydrate formation and stability remains still much unanswered, even though a few computer simulation model studies are reported. We first examined chemical shift difference of 27Al, 29Si, 23Na between dry containing intercalated (MH) interlayer. also measured solid-state 13C MAS NMR...
Natural gas hydrates were recovered from near-seafloor sediments and analysed to compare two distinctive methane inclusion phenomena. We document the first observation of abnormal occupancy in sediment-rich NGH deposits.
If the conversion of methane hydrate to carbon dioxide with net recovery could occur, this would be quite attractive as an innovative method both production and storage. In study, swapping phenomenon occurring in gas hydrates its potential application sequestration was demonstrated through stability condition measurements 13C NMR spectroscopic analysis. The phase equilibria for ternary CH4 + CO2 water mixtures were measured determine conditions mixed hydrates. Through measurements, it found...
Abstract The Korea Institute of Geoscience and Mineral Resources conducted depressurization experiments at various gas hydrate saturation conditions, using mini pressure cells, to determine critical saturation. Their results indicated that it is necessary carry out a numerical simulation in connection with the numerous conditions could not be incorporated into experiments. In this study, model, which simulated cell, was developed verify aforementioned changes fluid density computer...
Aperture distributions have been measured using replicas of apertures to investigate the effect variable aperture on solute transport in five transparent fracture samples. The coefficient variation ( C v ), correlation length (λ), and anisotropy ratio (AR) were used quantify distributions. Step‐type tracer tests showed that dispersion is significantly influenced by both λ . Dispersivity (α) increases with magnitude α proportional a polynomial function natural logarithm 2 linearly total sill...
Replacement technique is known as a promising method for potential energy extraction from gas hydrate deposits and greenhouse sequestration into deep ocean sediments. When it comes to the utilization of replacement in field applications, soaking duration or frequency CO2/N2 injection becomes an important process variable. In this study, influence on CH4 efficiency was quantitatively investigated first time by imitating hydrate-bearing The with performed through two consecutive stages:...
This study proposes a reliable evaluation method for three-phase saturation (water, gas hydrate (GH), and gas) during the GH dissociation core experiment using deep learning. A convolutional neural network (CNN) takes computed tomography (CT) images obtained as an input provides output. Although machine/deep learning methods have been applied to from CT in previous research, they were not due lack of adequate amount training data where model could find appropriate parameters. Besides,...
This study conducts saturation modeling in a gas hydrate (GH) sand sample with X-ray CT images using the following machine learning algorithms: random forest (RF), convolutional neural network (CNN), and support vector (SVM). The RF yields best prediction performance for water, gas, GH samples among three methods. CNN SVM also exhibit sufficient performances under restricted conditions, but require improvements to their reliability overall performance. Furthermore, lowest mean square error...