Phase equilibria for the ionic semiclathrate hydrate formed with tetrabutylphosphonium chloride plus CO₂, CH₄, or N₂

详细信息    查看全文

• 作者：Kento Iino ; Yusuke Sakakibara ; Takuya Suginaka ; Ryo Ohmura
• 关键词：Clathrate hydrates ; Semiclathrate hydrates ; Tetrabutylphosphonium chloride ; Phase equilibrium
• 刊名：Journal of Chemical Thermodynamics
• 出版年：April, 2014
• 年：2014
• 卷：71
• 期：Complete
• 页码：133-136
• 全文大小：452 K

文摘

This paper presents the phase equilibrium conditions for the semiclathrate hydrates in the systems of (CO₂, CH₄ or N₂ + tetrabutylphosphonium chloride + water). The experiments were performed by isochoric method within the range of temperature from (283.0 to 291.8) K and pressure from (0.19 to 5.02) MPa with mass fraction of tetrabutylphosphonium chloride aqueous solution 0.36. The presence of tetrabutylphosphonium chloride increases the phase equilibrium temperatures of CO₂, CH₄ or N₂ hydrates by at least 8 K at a given pressure. The gas separation performance in tetrabutylphosphonium chloride hydrate systems was compared with that in other semiclathrate hydrate systems, based on the measured phase equilibrium conditions.