文化大學機構典藏 CCUR:Item 987654321/46164
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    題名: Measurements of the dissociation conditions for methane hydrates with various additives of 1,2-epoxybutane, 2,3-dihydrofuran, N-methylformamide, 4-methylmorpholine, or 1-(2-furyl)methylamine
    作者: Wu, TT (Wu, Tsung-Tse)
    Shao, WC (Shao, Wan-Chun)
    Chen, YP (Chen, Yan-Ping)
    Tang, M (Tang, Muoi)
    貢獻者: 化材系
    關鍵詞: Methane hydrate
    Five additives
    Isochoric method
    Dissociation conditions
    Hydrate plus liquid water plus vapor (H-L-w-V)
    Phase equilibrium
    日期: 2020-04-01
    上傳時間: 2020-04-14 10:48:51 (UTC+8)
    摘要: The experimental phase equilibrium measurements for the dissociation conditions of methane hydrates in the presence of five additives are reported in this study. The isochoric method was employed to measure the three-phase (hydrate + liquid water + vapor, H-L-w-V) dissociation conditions (the three-phase equilibrium temperatures and pressures) under various concentrations of five additive compounds. These additives include 1,2-epoxybutane that showed a promotion effect up to 2.6 K at a fixed pressure for the formation of methane hydrate. Other additives of 2,3-dihydrofuran N-methylformamide, 4-methylmorpholine and 1-(2-furyl)methylamine, however, all showed the inhibition effect from 1.3 up to 9 K. The possible structures of methane hydrates with these additives were estimated from the Clausius-Clapeyron equation by using the measured equilibrium temperature and pressure data. It is shown that with the additive of 1,2-epoxybutane, a sII hydrate structure might cause the promotion effect. The other four additives with inhibition effect all showed the possible sI structure. This study reports novel phase equilibrium data and verifies a useful screening method to select the available additives for natural gas production or transportation. (C) 2020 Elsevier B.V. All rights reserved.
    關聯: FLUID PHASE EQUILIBRIA 卷冊: 509 文獻號碼: 112456
    顯示於類別:[化學工程與材料工程學系暨碩士班] 期刊論文

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