Hydrogen adsorption process in nanocrystalline nuclear graphite

Kinetics and mechanism of hydrogen adsorption in as-obtained ground nuclear graphite Wendelstein 7-X are examined. In the first time interval process is determined by dissociation molecule, occurring at outer surface open micropores particles. However, second interval, slowest step inter-granular inter-crystallite diffusion nanopores graphite. The X-ray analysis shows, that grinding results finer particles with nanocrystals larger density opened pores carbon reactive sites. capacity rate increase comminution adsorbed does not substantially alter microstructure