Search Results - "Lee, Jaehyoung"

Experimental Verification of Methane–Carbon Dioxide Replacement in Natural Gas Hydrates Using a Differential Scanning Calorimeter by Lee, Seungmin, Lee, Yohan, Lee, Jaehyoung, Lee, Huen, Seo, Yongwon

“…The methane (CH4) – carbon dioxide (CO2) swapping phenomenon in naturally occurring gas hydrates is regarded as an attractive method of CO2 sequestration and…”
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Saturation Modeling of Gas Hydrate Using Machine Learning with X-Ray CT Images by Kim, Sungil, Lee, Kyungbook, Lee, Minhui, Ahn, Taewoong, Lee, Jaehyoung, Suk, Hwasoo, Ning, Fulong

“…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…”
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Guest Gas Enclathration in Semiclathrates of Tetra-n-butylammonium Bromide: Stability Condition and Spectroscopic Analysis by Lee, Seungmin, Park, Sungmin, Lee, Youngjun, Lee, Jaehyoung, Lee, Huen, Seo, Yongwon

“…In this study, guest gas enclathration behavior in semiclathrates of tetra-n-butylammonium bromide (TBAB) was closely investigated through phase equilibrium…”
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Sequestering Carbon Dioxide into Complex Structures of Naturally Occurring Gas Hydrates by Park, Youngjune, Kim, Do-Youn, Lee, Jong-Won, Huh, Dae-Gee, Park, Keun-Pil, Lee, Jaehyoung, Lee, Huen

“…Large amounts of CH₄ in the form of solid hydrates are stored on continental margins and in permafrost regions. If these CH₄ hydrates could be converted into…”
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Comparison of standard-setting methods for the Korean Radiological Technologist Licensing Examination: Angoff, Ebel, bookmark, and Hofstee by Park, Janghee, Ahn, Duck-Sun, Yim, Mi Kyoung, Lee, Jaehyoung

“…Purpose: This study aimed to compare the possible standard-setting methods for the Korean Radiological Technologist Licensing Examination, which has a fixed…”
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Effect of Interlayer Ions on Methane Hydrate Formation in Clay Sediments by Yeon, Sun-Hwa, Seol, Jiwoong, Seo, Young-ju, Park, Youngjune, Koh, Dong-Yeun, Park, Keun-Pil, Huh, Dae-Gee, Lee, Jaehyoung, Lee, Huen

“…Natural methane hydrates occurring in marine clay sediments exhibit heterogeneous phase behavior with high complexity, particularly in the negatively charged…”
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CH4 recovery and CO2 sequestration using flue gas in natural gas hydrates as revealed by a micro-differential scanning calorimeter by Lee, Yohan, Kim, Yunju, Lee, Jaehyoung, Lee, Huen, Seo, Yongwon

“…•The extent of the replacement was improved due to the enclathration of N2 in small cages.•The dissociation enthalpies of the replaced gas hydrates were…”
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Experimental analysis on the effects of variable apertures on tracer transport by Lee, Jaehyoung, Kang, Joe M., Choe, Jonggeun

“…Aperture distributions have been measured using replicas of apertures to investigate the effect of variable aperture on solute transport in five transparent…”
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Inclusion Effect of Thermal Stimulation on the Cyclic Depressurization Process for Gas Hydrate Production Using X‑ray Computed Tomography Image Analysis by Seo, Young-ju, Kim, Joo Yeon, Lee, Jaehyoung, Ahn, Taewoong

“…A combined cyclic depressurization method was introduced to enhance the productivity and sediment stability for gas hydrate (GH) production. Specifically, the…”
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Effective CH4 production and novel CO2 storage through depressurization-assisted replacement in natural gas hydrate-bearing sediment by Choi, Wonjung, Mok, Junghoon, Lee, Jonghyuk, Lee, Yohan, Lee, Jaehyoung, Sum, Amadeu K., Seo, Yongwon

“…[Display omitted] •Depressurization-assisted replacement in hydrate-bearing sediment was investigated.•Longitudinal distributions of replacement efficiency and…”
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Optimal driving force for the dissociation of CH4 hydrates in hydrate-bearing sediments using depressurization by Choi, Wonjung, Mok, Junghoon, Lee, Yohan, Lee, Jaehyoung, Seo, Yongwon

“…In this study, three kinds of driving forces for the dissociation of CH4 hydrates were experimentally investigated to determine which was optimal for a…”
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CO2 hydrate behavior in the deep ocean sediments; phase equilibrium, formation kinetics, and solubility by Lee, Kyung Min, Lee, Huen, Lee, Jaehyoung, Kang, Joo M.

“…Three‐phase equilibria (H‐LW‐V) for CO2 and NaCl solutions containing clay were measured to examine both electrolyte and capillary effect inside interlayer…”
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Influence of CO2 injection rate and memory water on depressurization-assisted replacement in natural gas hydrates and the implications for effective CO2 sequestration and CH4 exploitation by Choi, Wonjung, Mok, Junghoon, Lee, Jonghyuk, Lee, Yohan, Lee, Jaehyoung, Seo, Yongwon

“…This study was conducted to investigate the influence of CO2 injection rate and memory water on guest exchange and hydrate reformation behavior in CH4…”
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Structure identification and dissociation enthalpy measurements of the CO2+N2 hydrates for their application to CO2 capture and storage by Lee, Yohan, Lee, Seungmin, Lee, Jaehyoung, Seo, Yongwon

“…•We examined the structure and dissociation enthalpies of CO2+N2 hydrates.•The μ-DSC provided reliable hydrate phase equilibrium data.•The structural…”
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Energy-efficient natural gas hydrate production using gas exchange by Koh, Dong-Yeun, Kang, Hyery, Lee, Jong-Won, Park, Youngjune, Kim, Se-Joon, Lee, Jaehyoung, Lee, Joo Yong, Lee, Huen

“…[Display omitted] •The state-of-the-art gas exchange concept for NGH production is presented.•Thermodynamic principles and underlying mechanisms of gas…”
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Structural transition induced by cage-dependent guest exchange in CH4 + C3H8 hydrates with CO2 injection for energy recovery and CO2 sequestration by Lee, Yohan, Choi, Wonjung, Seo, Young-ju, Lee, Joo Yong, Lee, Jaehyoung, Seo, Yongwon

“…[Display omitted] •The guest exchange behavior during replacement was quantitatively investigated.•The CO2 occupation induced the depletion of C3H8 in the…”
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CH4 – Flue gas replacement occurring in sH hydrates and its significance for CH4 recovery and CO2 sequestration by Lee, Yohan, Seo, Young-ju, Ahn, Taewoong, Lee, Jaehyoung, Lee, Joo Yong, Kim, Se-Joon, Seo, Yongwon

“…•We experimentally verify the isostructural CH4 – flue gas replacement that occurs in sH hydrate.•13C NMR spectroscopy reveals that the initial CH4+NH hydrate…”
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Thermodynamic stability and guest distribution of CH4/N2/CO2 mixed hydrates for methane hydrate production using N2/CO2 injection by Lim, Dongwook, Ro, Hyeyoon, Seo, Yongwon, Seo, Young-ju, Lee, Joo Yong, Kim, Se-Joon, Lee, Jaehyoung, Lee, Huen

“…•We examine the thermodynamic stability and guest distribution of CH4/N2/CO2 mixed hydrates.•Phase equilibria of the CH4/N2/CO2 mixed hydrates were measured to…”
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Effects of viscosity ratio, interfacial tension and flow rate on hysteric relative permeability of CO2/brine systems by Jeong, Gu Sun, Lee, Jaehyoung, Ki, Seil, Huh, Dae-Gee, Park, Chan-Hee

“…It is essential to understand the relative permeability of CO2 and brine when characterizing the flow of CO2 as it is injected into an aquifer. The relative…”
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One-dimensional productivity assessment for on-field methane hydrate production using CO2/N2 mixture gas by Koh, Dong-Yeun, Ahn, Yun-Ho, Kang, Hyery, Park, Seongmin, Lee, Joo Yong, Kim, Se-Joon, Lee, Jaehyoung, Lee, Huen

“…The direct recovery of methane from gas hydrate‐bearing sediments is demonstrated, where a gaseous mixture of CO2 + N2 is used to trigger a replacement…”
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