Gg. Kuvshinov et al., PECULIARITIES OF FILAMENTOUS CARBON FORMATION IN METHANE DECOMPOSITION ON NI-CONTAINING CATALYSTS, Carbon, 36(1-2), 1998, pp. 87-97
Experimental data on the effect of CH4+H-2 mixtures composition and te
mperature on catalytic filamentous carbon (CFC) formation in methane d
ecomposition on Ni-containing catalyst are presented. Microscopy studi
es have shown that at the lowest methane concentration (2.5%) the amou
nt of CFC produced per unit of catalyst mass is limited primarily by t
he surface effects imposed by the carbon growth centers (GC) rather th
an by volume ones. The shape of GC where carbon filament forms depends
on the reaction medium composition and temperature. By varying the H-
2 concentration in the reaction medium, one can change the texture of
the CFC produced. (C) 1997 Elsevier Science Ltd.