천연 가스 하이드레이트 생산 방법 개발을 위한 거시적, 미시적 연구 및 하이드레이트의 수소 저장 매체로의 응용

학위논문(석사) - 한국과학기술원 : 생명화학공학과, 2014.2, [ iv, 92 p. ]The demands of energy resources keep increasing with high industrialization. Simultaneously, global warming problems are in serious state all around the world since global warming gas is emitted from carbon based fuels. As a solution of energy and environmental problems, natural gas hydrate has received attention recently because of its high potential for new energy resource and reservoir for CO2 sequestration. Fortunately, the presence of huge natural gas hydrate reservoirs was revealed in the Ulleung basin of the Korea by Korean expedition team. Natural gas hydrate is one type of clathrate hydrates. Clathrate hydrates are non-stoichiometric crystalline inclusion compounds. Clathrate hydrates are composed of host molecules (H2O) and small guest molecules (gaseous or ionic molecule) with their physical interaction. In general, when water molecules are cooled below the freezing point, they make hexagonal form of ice. However, when water molecules are placed in a high pressure condition with gaseous molecules or mixed with certain ionic compounds, hydrogen bonded linkages are formed between water molecules making “cage” which can accommodate guest molecules. Many researchers investigated the structure, physical and chemical properties, host-guest interaction, and thermodynamic properties of clathrate hydrate and tried to apply to industrial fields. Moreover, people try to find out new clathrate system as a candidate of new energy storage material. In this study, kinetic, thermodynamic, and spectroscopic analysis of clathrate hydrates were performed, especially focused on macroscopic and microscopic analysis for developing production method of natural gas hydrate and physicochemical analysis of new clathrate compound. In this study, there are three sections. First, by using 1-dimensional tube type reactor (8 meters long), productivity of CH4 from CH4 hydrate was evaluated with CO2 + N2 mixture in macroscopic scale. Next, thermodynamic and spectroscopic analys...한국과학기술원 : 생명화학공학과

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