Effect of the surfactants on hydrate formation during methane storage process

• Published in: IOP Conference Series: Earth and Environmental Science
• Main Authors: Zhang, Panfeng, Diao, Yuqian, Dong, Zhao, Pei, Shufeng, Wang, Qiaobo, Ren, Shaoran, Zhang, Liang
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: IOP Publishing 2020
• Subjects: Methane hydrate
• Online Access: http://dx.doi.org/10.1088/1755-1315/605/1/012007; https://iopscience.iop.org/article/10.1088/1755-1315/605/1/012007/pdf; https://iopscience.iop.org/article/10.1088/1755-1315/605/1/012007

Abstract Enhanced hydrate formation rate by adding surfactant for achieving hydrate-based methane storage and transportation has drawn much attention in recent years. In this study, the effect of cocamidopropyl dimethylamine (CPDA), Sodium dodecyl sulfate (SDS), dodecyl trimethyl ammonium bromide (DTAB), and hexadecyl trimethyl ammonium bromide (HTAB) on induction time, the formation rate, water conversion ratio, and dissociation rate of methane hydrate have been investigated. And all the results have been compared with the water system without any additives. After adding surfactant into the aqueous solution, the hydrate formation is promoted, which lead to higher the hydrate formation rate and more water converted to be hydrate. 69.96wt% water was converted to be hydrate and its formation rate is 31.58mmol/min in 1.0wt%CPDA aqueous solution, in water without any additives system, it is 29.44wt%, 11.45mmol/min, respectively. Besides, the highest dissociation rate is also found in CPDA aqueous solution system, it is 42.2mmol/min and is 2.16 times than that of the pure water system.