Hydrate Phase Equilibria of Methane + Mixed (TBAB + THF) in the Presence and Absence of NaCl and/or MgCl2 Aqueous Solutions,Journal of Chemical & Engineering Data

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Hydrate Phase Equilibria of Methane + Mixed (TBAB + THF) in the Presence and Absence of NaCl and/or MgCl2 Aqueous Solutions
Journal of Chemical & Engineering Data ( IF 2.0 ) Pub Date : 2019-12-20 , DOI: 10.1021/acs.jced.9b00886
Hassan Pahlavanzadeh ₁ , Mohammad Pourranjbar ₁ , Ali Askari Zadeh Mahani ₂ , Amir H. Mohammadi ₃

Affiliation

Available water for the formation of natural gas hydrate at the industrial scale is normally saline water in which the dissolved salts inhibit the hydrate formation. To overcome this challenge, thermodynamic promoters can be used. In the present work, hydrate phase equilibria of methane + mixed promoters of tetrahydrofuran (THF) and tetra-n-butyl ammonium bromide (TBAB) were investigated in the absence and presence of NaCl, MgCl₂, and NaCl + MgCl₂ aqueous solutions. The phase equilibrium data, which were generated using an isochoric pressure-search method with a step heating technique, are reported in the pressure and temperature ranges of 1.09–5.16 MPa and 286.0–299.0 K, respectively. Equilibrium data show that an aqueous mixture of THF + TBAB (0.15 + 0.05 mass fractions) in the presence of NaCl systems is a more effective promoter compared to a single promoter TBAB or THF even at a high concentration of about 0.2 mass fraction.

中文翻译：

NaCl和/或MgCl ₂水溶液存在和不存在下甲烷+混合（TBAB + THF）的水合物平衡

在工业规模上用于形成天然气水合物的可用水通常是盐水，其中溶解的盐抑制水合物的形成。为了克服这一挑战，可以使用热力学促进剂。在本工作中，研究了在不存在和存在NaCl，MgCl ₂和NaCl + MgCl ₂的情况下，甲烷+四氢呋喃（THF）和四正丁基溴化铵（TBAB）混合促进剂的水合平衡。水溶液。使用等温压力搜索方法和逐步加热技术生成的相平衡数据分别在1.09-5.16 MPa和286.0-299.0 K的压力和温度范围内记录。平衡数据显示，即使在约0.2质量分数的高浓度下，在NaCl系统存在下，THF + TBAB（0.15 + 0.05质量分数）的水性混合物也比单个促进剂TBAB或THF更有效。

更新日期：2019-12-21

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