金属担持した多孔性材料の水素吸着特性

抄録

The hydrogen adsorption isotherms of activated carbon fiber (ACF), single-walled carbon nanotube (SWCNT) and H-Y-type zeolite (H-YZ) were measured at 77 and 303K in a hydrogen pressure of 0-3.5MPa. The amount of adsorbed hydrogen by weight depended on the micropore volume of the samples. The ACF with the greatest micropore volume indicated the maximal amount of adsorbed hydrogen. The amount in SWCNT was remarkably increased by the treatment in 4N HNO₃. Further, the hydrogen adsorption behavior of ACF and H-YZ loaded with platinum and palladium (M-ACF and M-YZ) was investigated at 303K in 0-5MPa. The increase in the amount of hydrogen adsorbed on M-ACF and M-YZ was observed in the range of 0-0.01MPa by the chemisorption of hydrogen on platinum and palladium. However, the metal loading did not enhance the physical adsorption capacity of ACF and YZ at higher pressures up to 3MPa.