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Application of hydrophobic particles in the formation kinetics of methane hydrate in water-in-oil emulsion
Petroleum Science and Technology ( IF 1.5 ) Pub Date : 2019-12-04 , DOI: 10.1080/10916466.2019.1697703
Rencong Song 1 , Liyan Shang 2 , Ping Li 2 , Li Zhou 2 , Zhe Wang 1 , Zhiming Liu 1 , Jie Xu 3
Affiliation  

Abstract Aiming at the problem of natural gas hydrate blockage inside oil and gas pipelines, the key to reasonably suppress the formation of hydrates in pipelines is to find the factors that cause the hydrates to coalesce quickly. Since carbonates and silicon-containing substances are the main components of impurities in mining, the formation of methane hydrate has been studied. The emulsion was formulated with Span85 and SDS, and the formation rate and growth morphology of the hydrate were studied by adding nano-calcium carbonate. Experiments were carried out on emulsion systems having a particle content ranging from 0.1 wt% to 6 wt%. The results show that when the particle content in the system is low (less than 0.3 wt%), the hydrate formation rate is accelerated; when the particle content is high (above 2 wt%), the hydrate formation rate is lowered. This phenomenon was confirmed by calculating the moles consumption of methane gas. Moreover, the particles increase the collision probability of the crystal nucleus in the system, and can be used as a nucleation site of the hydrate crystal nucleus. The promotion or inhibition of the system on hydrate growth has reference value for preventing pipeline blockage.

中文翻译:

疏水粒子在油包水乳状液甲烷水合物形成动力学中的应用

摘要 针对油气管道内天然气水合物堵塞问题,合理抑制管道内水合物形成的关键是找出导致水合物快速聚结的因素。由于碳酸盐和含硅物质是采矿中杂质的主要成分,因此对甲烷水合物的形成进行了研究。采用Span85和SDS配制乳液,通过加入纳米碳酸钙研究了水合物的形成速率和生长形态。对颗粒含量为 0.1 重量%至 6 重量%的乳液体系进行了实验。结果表明,当体系中颗粒含量较低(小于0.3 wt%)时,水合物形成速度加快;当颗粒含量高(超过 2 wt%)时,水合物形成速率降低。通过计算甲烷气体的摩尔消耗量证实了这种现象。而且粒子增加了体系中晶核的碰撞概率,可以作为水合物晶核的成核位点。该系统对水合物生长的促进或抑制对防止管道堵塞具有参考价值。
更新日期:2019-12-04
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