Kinetic investigation of carbon monoxide hydrogenation under realistic conditions of methanation of biomass derived syngas
2013
Zhang, Jie | Fatah, Nouria | Capela, Sandra | Kara, Yilmaz | Guerrini, Olivier | Khodakov, Andrei Y.
A milli-fixed bed reactor was employed to investigate the kinetics of CO hydrogenation reaction over a commercial nickel catalyst. The experimental studies were carried out under industrially relevant conditions of low temperature methanation of biomass derived syngas: at the temperature range 250–360°C, various H₂/CO feed ratio, in the presence of CO₂ and steam. The catalyst exhibited a gradual loss of activity during the kinetic tests. The deactivation behavior of catalyst depended on operating conditions and might be explained by carbon deposition according to the results of H₂-TPR/MS and XPS analysis. At the initial stages of the reaction, the reactor was simulated using one-dimensional pseudo-homogeneous model and assuming plug flow. The observed initial reaction rates were fitted using intrinsic kinetic models.
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