Publication Details (including relevant citation information):
F. Arena, G. Trunfio, E. Alongi, D. Branca, A. Parmaliana. Applied catalysis A: General, 266 (2004) 155-162.
The activity–stability pattern of a 19 wt.% Ni/MgO catalyst in the pre-reforming (T, 450 ◦C; P, 10 bar) of n-hexane with steam (S/C, 1.5–3.5) in absence and presence of H2 (H/C, 2) has been investigated. Deactivation profiles of the kinetics of CH4 and CO/CO2 formation indicate that the activity, selectivity and stability are closely related. Hydrogenation of carbon species to methane is a critical step involving the occurrence of coking in the pre-reforming of hexane. Thermodynamic analysis of the outlet reaction stream signals that the net coking rate depends upon the relative kinetics of carbon methanation (MET, C + 2H2CH4) and gasification/water–gas-shift (GAS, C+H2OH2 +CO; WGS, CO + H2OCO2 + H2) reactions, while negligible appears the contribution of the Bouduard reaction path (DISP, 2COC + CO2).
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