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Korean Chemical Engineering Research,
Vol.42, No.2, 168-174, 2004
Vol.42, No.2, 168-174, 2004
다성분계 천연가스 하이드레이트 제조 및 특성 분석
Study on Synthesis and Characteristics of Multi-Components System Natural Gas Hydrates
메탄을 포함한 천연가스 하이드레이트의 상평형 조건을 관찰하였으며, 제조시 반응시간에 따른 천연가스 주요 성분들의 초기 농도 대비 농도변화에 대한 하이드레이트 생성 거동을 관찰하였다. 하이드레이트 제조 중에 천연가스의 성분들이 서로 다른 농도변화를 나타내고 제조된 하이드레이트를 해리시켰을 때도 가스 성분들의 서로 다른 해리 속도에 의해 성분들의 농도가 변화되었다. 천연가스 하이드레이트 제조시 유도지체시간은 다성분계이므로 짧은 시간에서 관찰되었다. 온도가 276.65 K이고 교반속도가 600 rpm 일때 반응 압력이 4 MPa에서 7 MPa로 증가할수록 생성속도는 증가하였고, 가스저장량은 압력이 4 MPa 이외에는 거의 유사하였다. 또한 압력이 6 MPa이고 교반속도가 600 rpm 일때 반응온도가 274.15 K에서 283.15 K까지 증가할수록 생성속도와 가스저장량은 감소하였다. 그리고 온도가 276.65 K이고 압력이 6 MPa일때 교반속도가 300 rpm에서 600 rpm으로 증가하면, 생성속도와 가스저장량은 증가하였다.
A phase equilibrium of natural gas hydrate including methane is observed by visual cell, in the manufacture of the natural gas hydrate the phenomena of a hydrate formation on the change of the gas concentration in comparison with initial concentration is observed for the reaction time. The concentration of components of natural gas is changed during the reaction and the concentration of components is changed by each decomposing rates of gases during the decomposition of hydrate. The induction delay time of natural gas hydrate formation is shorter than that of methane hydrate formation due to multiple components. The hydrate growth rate increases with increasing reaction pressure(4 MPa to 7 MPa) and gas storage ability is constant
for the reaction pressure except 4 MPa at 276.65 K and 600 rpm. The hydrate growth rate and gas storage ability decreases with increasing reaction temperature(274.15 K to 283.15K) at 6 MPa and 600 rpm. Hydrate growth rate and gas storage ability increases with increasing stirring rate(300 to 600 rpm) at 6 MPa and 276.65 K.
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