The phase diagram for methane + water is explained, in relation to hydrate applications, such as in flow assurance and in nature. For natural applications, the phase diagram determines the regions for hydrate formation for two- and three-phase conditions. Impacts are presented for sample...

The initial density correction to gaseous viscosity using accurate realistic potentials of the noble gases is evaluated using the Rainwater–Friend theory. It is shown that this theory works satisfactorily for densities up to about 2moldm−3. Due to the superimposability of the noble gas...

The Rainwater–Friend theory is used for the evaluation of the initial density dependence of the thermal conductivity of the noble gases using accurate realistic potentials. This theory, which was originally developed for spherically symmetric potentials, is adapted for the calculation of the...

In this paper, we experimentally investigated the time evolution of compositions in the gas phase and the hydrate slurry during long-term operations of hydrate-based CO2 separation. We performed continuous gas separation experiments at pressure of 2.3MPa and temperature of 273.2K. We continually...

This article reports our novel idea about the thermal stimulation of seabed hydrate reservoirs for the purpose of natural gas production. Our idea is to use submarine heat pumps, which are to be placed near the hydrate reservoir and work to recover thermal energy from the surrounding seawater...

Growth rate of a hydrate layer at the guest/liquid-water interface is analyzed considering the conjugate process of the mass-transfer and hydrate crystal growth. Hydrate-layer growth rate data in the literature are often compiled according to the system subcooling (∆<em>T </em>≡ <em>T</em>_eq − <em>T</em>_ex, where...</sub>

The clathrate hydrate formation from a model natural gas, i.e., a mixture of methane, ethane, and propane in a 90:7:3molar ratio, under a constant pressure was experimentally investigated, focusing on the compositional evolution of hydrate crystals formed inside a gas-bubbling-type reactor...

Anthocyanins in sweetpotato ( Ipomoea batatas L.) have attracted much attention in light of their multiple health benefits and excellent properties as processed foods. Although crossbreeding is an effective way to breed new cultivars of sweetpotato, there are few reports on how anthocyanin...