2009 Volume 50 Issue 7 Pages 1855-1858
The effect of variation of LiOH content on hydrogen desorption properties in LiH-(30–60) mol%LiOH composites was investigated. The addition of LiOH destabilized LiH in desorbing hydrogen below 300°C for all composites while pure LiH desorbs hydrogen above 650°C. The hydrogen desorption temperature of these composites decreased with decreasing the content of LiOH. The onset temperature of hydrogen desorption lowered to 262°C for the sample of LiH-30 mol%LiOH.
In the TDS measurement, the generation of water was observed around 420°C for the samples of LiH-(40–60) mol%LiOH due to decomposition of unreacted LiOH. The intensity of the water peak from these composites in TDS decreases with decreasing the content of LiOH. The water generation was unobserved from LiH-30 mol%LiOH composite. These results indicate that LiH-(30 and 40) mol%LiOH is a suitable composition for hydrogen desorption in this study.
