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Received June 2, 2020
Accepted July 14, 2020
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에틸렌글리콜과 염이 포함된 메탄 하이드레이트의 상평형과 형성 거동
Phase Equilibria and Formation Behaviors of Methane Hydrate with Ethylene Glycol and Salts
강원대학교 에너지-자원공학과, 24341 강원도 춘천시 강원대학길 1
Department of Energy and Resources Engineering, Kangwon National University, 1, Kangwondaehak-gil, Chuncheon-si, Gangwon-do, 24341, Korea
minjun.cha@kangwon.ac.kr
Korean Chemical Engineering Research, November 2020, 58(4), 635-641(7), 10.9713/kcer.2020.58.4.635 Epub 29 October 2020
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Abstract
이 연구에서는 에틸렌글리콜과 염이 포함된 메탄 하이드레이트의 상평형과 형성 거동을 측정하였다. 염의 종류로는 염화나트륨(NaCl), 브롬화나트륨(NaBr), 아이오딘화나트륨(NaI)을 이용하였으며, 272~283 K의 온도 범위와 3.5~11 MPa의 압력범위에서 상평형 조건을 확인하였다. 5 wt% NaCl + 10 wt% MEG, 5 wt% NaBr + 10 wt% MEG, 5 wt% NaI + 10 wt% MEG의 순서로 메탄 하이드레이트의 억제 효과가 나타났음을 확인하였다. 에틸렌글리콜과 염이 포함된 메탄 하이드레이트의 형성 거동은 생성유도시간, 가스소모량과 성장 속도를 분석하여 확인하였다. 에틸렌글리콜과 염이 포함된 메탄 하이드레이트의 생성유도시간은 실험 조건에서 큰 차이를 보이지 않았지만, 에틸렌글리콜과 염의 첨가는 가스소모량과 성장 속도에 영향을 주었음을 확인할 수 있었다.
In this study, phase equilibria and formation behaviors of methane hydrate containing mono-ethylene glycol (MEG) and salts (sodium chloride, NaCl; sodium bromide, NaBr; sodium iodide, NaI) are investigated. Equilibrium conditions of methane hydrate containing MEG and salts are measured in a temperature range 272~283 K and a pressure range 3.5~11 MPa. Hydrate inhibition performance in the presence of additives can be summarized as follows: methane hydrate containing (5 wt% NaCl + 10 wt% MEG) > (5 wt% NaBr + 10 wt% MEG) > (5 wt% NaI + 10 wt% MEG). Formation behaviors of methane hydrate with MEG and salts are investigated for analyzing the induction time, gas consumption amount and growth rate of methane hydrates. There are no significant changes in the induction time during methane hydrate formation, but the addition of MEG and salts solution during hydrate formation can affect the gas consumption amount and growth rate.
Keywords
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