CIESC Journal ›› 2021, Vol. 72 ›› Issue (11): 5751-5760.DOI: 10.11949/0438-1157.20210662

• Energy and environmental engineering • Previous Articles     Next Articles

Experimental study on kinetics of methane hydrate formation enhanced by copper foam

Junhua PEI1,2(),Liang YANG1,2(),Xin WANG1,2,Han HU1,2,Daoping LIU1,2   

  1. 1.School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
    2.Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering, Shanghai 200093, China
  • Received:2021-05-14 Revised:2021-07-20 Online:2021-11-12 Published:2021-11-05
  • Contact: Liang YANG

泡沫铜强化甲烷水合物生成动力学实验研究

裴俊华1,2(),杨亮1,2(),汪鑫1,2,胡晗1,2,刘道平1,2   

  1. 1.上海理工大学能源与动力工程学院,上海 200093
    2.上海市动力工程多相流与传热重点实验室,上海 200093
  • 通讯作者: 杨亮
  • 作者简介:裴俊华(1996—),男,硕士研究生,peijunhua2021@163.com
  • 基金资助:
    国家自然科学基金项目(52176015)

Abstract:

Increasing hydrate formation rate and gas storage density is very important for the application of natural gas hydrate storage and transportation technology. Three pieces of copper foam (CF) with different pore density herein were immersed in sodium dodecyl sulfate (SDS) solution to build a gas storage enhancement system, and to study on the kinetic characteristics of the formation of methane hydrate by metal foam in a high-pressure static reactor. The research results showed that the copper foam framework can provide sufficient crystallization points for the formation of hydrates, at the same time, it can be used as a “highway” for hydration heat transfer during hydrate growth. Methane hydrate can be quickly formed in SDS/CF system, the maximum hydration gas storage rate is between 19.24—21.04 mmol·mol-1·min-1, the gas storage capacity of the SDS solution with 15 PPI copper foam was the highest (139 mmol·mol-1), and it takes the shortest time to reach 90% of the maximum gas storage capacity (10.1 min). Under the pressure of 6.0—8.0 MPa, compared with SDS solution, the gas storage capacity of SDS solution with 15 PPI CF increased by 8.8%—35.6%, and the gas storage rates increased by 4.7%—40.4%. When the pressure is 5.0 MPa, the gas storage capacity of the pore density SDS/CF system is even increased by 13 times than that of the SDS solution, and the gas storage rate is increased by 16 times.

Key words: copper foam, methane hydrate, formation, kinetics, enhancement

摘要:

提高水合物生成速率和储气密度对天然气水合物技术应用非常重要。将三种孔密度的泡沫铜(CF)分别浸入十二烷基硫酸钠(SDS)溶液中构建水合储气强化体系,在高压静态反应釜中研究泡沫金属对甲烷水合物生成动力学特性。实验结果表明,泡沫铜骨架能为水合物生成提供充足的结晶点,同时可作为水合物生长过程水合热迁移的“高速公路”。甲烷水合物在SDS/CF体系中可快速生成,最大水合储气速率分布在19.24~21.04 mmol·mol-1·min-1之间,其中添加15 PPI泡沫铜的SDS溶液储气量最高(139 mmol·mol-1),且达到最大储气量90%所用时间最短(10.1 min)。在6.0~8.0 MPa压力下,相比SDS溶液,添加15 PPI泡沫铜的SDS溶液储气量提高了8.8%~35.6%,储气速率提高了4.7%~40.4%;特别在压力为5.0 MPa时,该孔密度SDS/CF体系储气量甚至比SDS溶液增加13倍,储气速率增加16倍。

关键词: 泡沫铜, 甲烷水合物, 生成, 动力学, 强化

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