NDLI: Rheological Study on Tetra-n-butyl Ammonium Salt Semi-clathrate Hydrate Slurries

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Rheological Study on Tetra-n-butyl Ammonium Salt Semi-clathrate Hydrate Slurries

Content Provider	Semantic Scholar
Author	Hashimoto, Shunsuke Kawamura, Kazushi Ito, Hiroyuki Nobeoka, Masahiro Ohgaki, Kazunari Inoue, Yoshiro
Copyright Year	2011
Abstract	Recently, slurries with phase change materials (hereafter, PCM) having latent heat have been received much attention as a high-density heat transportation system. So far, it has been reported that the thermal ability of slurries containing tetra-n-butyl ammonium salt solutions and their semi-clathrate hydrate: tetra-n-butyl ammonium bromide (TBAB) and fluoride (TBAF) as latent heat transport media is favorable. In the present study, the viscosity characteristics of TBAB or TBAF solutions and their hydrate-slurries were measured at various concentrations of solutions by use of a stress-control-type rheometer with parallel-plate device. The apparent viscosity of both solution and hydrate slurries increases as the temperature decreases, which may be caused by the increase of solid (hydrate particle) fraction in solution. The hydrate slurries exhibit the behavior like pseudo-plastic fluid. The viscosity characteristics of these hydrate slurries can be treated by use of only solid fraction despite different unit-cell structure between TBAB and TBAF hydrates. In addition, a very small amount of surfactant drastically reduces the apparent viscosity of hydrate slurries, which may be caused by the electric repulsion of surfactant-adsorbed hydrate particles.
File Format	PDF HTM / HTML
Alternate Webpage(s)	https://www.pet.hw.ac.uk/icgh7/papers/icgh2011Final00214.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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