Hydrate Dissociation Equilibrium Conditions for Carbon Dioxide + Tetrahydrofuran

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• 作者：Mao Wang ; Zhi-Gao SunXiao-Han Qiu ; Ming-Gui Zhu ; Cheng-Hao Li ; Ai-Jun Zhang ; Juan Li ; Cui-Min Li ; Hai-Feng Huang
• 刊名：Journal of Chemical & Engineering Data
• 出版年：2017
• 出版时间：February 9, 2017
• 年：2017
• 卷：62
• 期：2
• 页码：812-815
• 全文大小：248K
• ISSN：1520-5134

文摘

Hydrate equilibrium conditions (vapor + hydrate + liquid water + liquid tetrahydrofuran, THF) formed from carbon dioxide in aqueous solutions of THF is determined using a stepwise heating method under isochoric conditions in this work. THF is reported to form an SII hydrate. Hydrate phase equilibrium conditions are measured under the conditions of the THF mass concentration range of 0.0726–0.2503 and pressure range of 0.10–1.87 MPa. The experimental results present that the equilibrium pressures of the experimental systems of carbon dioxide + THF + H₂O are obviously lower than that of the carbon dioxide + H₂O system under test conditions. Furthermore, the experimental results also indicate that the carbon dioxide hydrate formation pressure decreased more apparently with more additives of THF.