ガスタービン用燃料供給源としての水素吸蔵合金 : 水素系の水素放出特性

概要

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In the prospect of using metal hydrides as a fuel storage tank for hydrogen gas turbines, a fundamental study was performed experimentally on the properties of hydrogen desorption under the isothermal condition at pressures and temperatures of practical interest using a mass flow meter system. A hydrogen storage alloy selected was MmNi_<4.15>Fe_<0.85>, because of having high equilibrium plateau pressures over wide ranges of hydrogen concentration in its metal hydride. It was found that the alloy could be easily activated at low temperatures and short incubation times. The hydrogen release rates from the hydride increased with an increase in ambient temperature and a decrease in ambient pressure. The rates could be represented as a function of equilibrium hydrogen concentration in the hydride, and the activation energy of the hydrogen desorption reaction was obtained. From the release rate data, a storage tank volume of the alloy was estimated to be comparable with those of liquid hydrogen tanks.
社団法人日本ガスタービン学会の論文
1992-09-10