2-2-4 ガス吸着法を用いた各種ガスハイドレートの比表面積測定(Session 2-2 ハイドレート分析) 2-2-4 Measurement of specific surface area of gas hydrate using gas adsorption method
Specific surface area (SSA) of gas hydrate is an important factor to control its formation / dissociation speed. We report SSA of methane and ethane hydrates formed from ice powder or small ice particles using a gas-adsorption method. Methane is used as an adsorbent on the surface of ice and gas hydrate at the temperature of liquid nitrogen. First, we measured SSA of ice particles, and then formed gas hydrate by pressurizing guest gas and melting ice. Residual methane and ethane were vacuumed under the temperature of liquid nitrogen and the melting temperature of pentane, respectively, and we measured SSA of their gas hydrates. Although some previous works reported high SSA and sub-micron order of porous microstructure on the surface of gas hydrate, we did not detect significant increase in SSA from ice to methane and ethane hydrates.
日本エネルギー学会大会講演要旨集 24(0), 42-43, 2015