Agglomeration of Hydrate Particles in Aqueous Surfactant Solution with Counter-Ion

作者：Komoda Yoshiyuki^*; Yamaguchi Hitomi; Kanki Takako; Suzuki Hiroshi; Usui Hiromoto

来源：Journal of Chemical Engineering of Japan, 2010, 43(1): 23-28.

DOI：10.1252/jcej.09we060

• Crystallization
• Viscoelasticity
• Particle Size Distribution
• Micellar Structure

Slurry containing hydrate particles as a phase-change material in the aqueous surfactant solution with counter-ion can be applied to construct a highly effective heat transport system by the combination of latent heat and drag-reducing effect. However, the efficiency of the system is influenced not only by thermal characteristics but also by the fluidity of the slurry, which is influenced by the size and concentration of the particles and the agglomerates. In this study, we first investigate the condition providing steady crystallized slurry. It has been found that crystallization attained steady state within 1 hour after the start of crystallization under a well-agitated condition. The viscosities and first normal stress differences of the steady crystallized slurry and saturated solution were measured to clarify the interaction between hydrate particle and micellar structure of surfactant. As a result, it turned out that the agglomeration of the hydrate particles was influenced by the size and strength of the micellar structure depends on the concentration of counter-ion. In particular, a slurry containing a large amount of counter-ion showed a drastic decrease in fluidity in a certain shear rate range probably due to agglomeration of entangled structures of surfactants.

• 出版日期2010