Filament growth, activation energies

Comparison of Measured Activation Energies for Filament Growth with Those for Carbon... 

Finally, is observed that the rcw increases with the pcH4 [16-18] and with the reduction temperature, while it diminishes with the reaction temperature. The influence of the ph2 has no clear effect. The effect of the reaction temperature is due to the fact that high reaction temperatures favor gasification over the growth of coke filaments [15,19,26,27] which would explain the negative value of the activation energy apparent for the filament growth. 

Table 8.2 Measured activation energies for filament growth with those for carbon diffusion in the corresponding metal catalysts.

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