Effects of Dimethyl Sulfoxide on Phase Equilibrium Conditions of CO2 and IGCC Fuel Gas Hydrate in the Presence and Absence of Tetra-n-butyl Ammonium Bromide

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• 作者：Yang Luo ; Zhen-Yu Yan ; Jing Li ; Guang-Juan Guo ; Xu-Qiang GuoQiang Sun ; Ai-Xian Liu
• 刊名：Journal of Chemical & Engineering Data
• 出版年：2017
• 出版时间：January 12, 2017
• 年：2017
• 卷：62
• 期：1
• 页码：188-193
• 全文大小：309K
• ISSN：1520-5134

文摘

This work presents the study to explore the thermodynamic conditions of CO₂ separation from the simulated integrated gasification combined cycle (IGCC) fuel gas via hydrate formation assisted by dimethyl sulfoxide (DMSO) and tetra-n-butyl ammonium bromide (TBAB). The measurements of the equilibrium hydrate formation conditions in the pressure range of (0.45 to 7.60) MPa and temperature range of (275.55 to 285.45) K were explored by the T-cycle method, and the gas phase composition at the equilibrium point was sampled and analyzed. In addition, the effect of DMSO upon CO₂ hydrate and CO₂ + TBAB was further investigated. The experimental results showed that while DMSO has a thermodynamic inhibition effect on the formation of CO₂ hydrate, but a kinetic promotion effect on the solubility of CO₂ in water solution, the mixture of TBAB and DMSO can reduce the pressure needed for CO₂ hydrate formation obviously as well as promote the solubility of CO₂ remarkably.