Taro Kawamura

TL;DR: In this article, the first trial in using microbubbles in hydrate formation was conducted, and it has been demonstrated that a microbubble system is a promising method for hydrate formation for two reasons: (1) its excellent gas-dissolution ability and (2) its ability to make the conditions of hydrate nucleation more mild due to the micro bubbles' property of increasing interior gas pressure while decreasing in size under water.

TL;DR: In this paper, the tetrahydrofuran (THF) + CH4, THF + CO2, CH4+ CO2+ CH4 hydrates were investigated over wide ranges of temperature, pressure, and concentration.

TL;DR: In this paper, an in situ Raman spectroscopy study on the guest replacement of methane hydrate with carbon dioxide at high pressures is presented, showing that the surface shielding of carbon dioxide hydrate formed in the outer layer plays a key function, retarding dissociation of methane in the core.

TL;DR: In this paper, high-pressure and high-temperature experiments of solid methane were performed using a laser-heated diamond anvil cell and X-ray diffractometry and Raman spectroscopy revealed the melting conditions to be above approximately 1100 K in a wide pressure range of 10 −80 GPa.

TL;DR: In this paper, a feature of structural changes in terms of pressure and guest size is summarised in the former part of this paper, and retention of the filled ice Ih structure of methane hydrate up to 42 GPa is described.