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Discussion of Agglomeration Mechanisms between Hydrate Particles in Water in Oil Emulsions

机译:油乳化液中水合颗粒之间的团聚机理探讨

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摘要

Line blockage due to gas hydrate formation in water/oil emulsions can be understood by considering the increase in the effective volume fraction $arphi_{eff}$ of dispersed particles in the hydrate slurry. This increase is the result of an agglomeration process that takes place during hydrate formation. Two mechanisms of agglomeration reported in the literature are discussed. The first one is the contact-induced agglomeration mechanism for which the crystallization-agglomeration process is described as the result of the contact between a water droplet and a hydrate particle. The second one is the shear-limited agglomeration mechanism for which the balance between hydrodynamic force and adhesive force is considered. It is proposed to gather these two mechanisms in a unified model in order to predict the evolution of the viscosity of the slurry during hydrate formation. Such a model can be based on a Population Balance Model in which the agglomeration kernel is related to the contact-induced mechanism and the fragmentation kernel is related to the shear-limited mechanism.
机译:可以通过考虑水合物浆液中分散颗粒的有效体积分数$ varphi_ {eff} $的增加来理解由于在水/油乳液中形成气体水合物而引起的管线堵塞。这种增加是水合物形成过程中发生的附聚过程的结果。讨论了文献报道的两种聚结机理。第一个是接触诱导的团聚机理,由于水滴和水合物颗粒之间的接触,因此描述了结晶团聚过程。第二种是受剪切限制的团聚机制,考虑了流体动力和粘附力之间的平衡。为了预测水合物形成过程中浆料粘度的变化,建议将这两种机理集中在一个统一的模型中。这样的模型可以基于人口平衡模型,其中聚集核与接触诱导机制有关,而破碎核与剪切限制机制有关。

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