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http://dx.doi.org/10.9713/kcer.2020.58.4.635

Phase Equilibria and Formation Behaviors of Methane Hydrate with Ethylene Glycol and Salts  

Kim, Dong Hyun (Department of Energy and Resources Engineering, Kangwon National University)
Park, Ki Hun (Department of Energy and Resources Engineering, Kangwon National University)
Cha, Minjun (Department of Energy and Resources Engineering, Kangwon National University)
Publication Information
Korean Chemical Engineering Research / v.58, no.4, 2020 , pp. 635-641 More about this Journal
Abstract
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
Methane hydrate; thermodynamic inhibitor; ethylene glycol; salt; phase equilibria; formation behaviors;
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