Abstract
The variation of surface characteristics of carbon blacks in methane catalytic decomposition process was investigated. Remarkable time variation of the methane decomposition rate was demonstrated and the influence of carbon deposition was suggested. Surface characteristics of carbon blacks were analyzed by nitrogen adsorption-desorption isotherms and transmission electron microscopy (TEM). Changes in the surface structural characteristics were evaluated by the specific surface area, the pore size distribution, and TEM images. The correlation between the catalytic activity and the surface characteristics was discussed.
