Pd-Pt合金の水素同位体吸蔵-放出特性

概要

論文の詳細を見る
Absorption and desorption of hydrogen isotopes by Pd-Pt alloys are studied to find appropriate column materials for the self-developing gas chromatography around room temperature for hydrogen isotope separation. The equilibrium pressure of H2 and D2 increased with increasing Pt contents in the alloys in the range from 0 to 10 at%Pt, indicating that the free energy of hydrogen absorption and hydride formation decreased with Pt contents. It was found that the decrease in the free energy change is principally due to the decrease in the heat of absorption and hydride formation; the entropy change was kept almost constant irrespective of the alloy composition. On the other hand, the isotope effect evaluated from the ratio between the plateau pressures of H2 and D2 was not much dependent on the alloy composition, indicating that any alloy investigated will be applicable as a separation column, depending on operation conditions of the self-developing gas chromatography.
富山大学の論文