Thermodynamic and experimental study of the partial oxidation of a Jet A fuel surrogate over molybdenum dioxide
2010; Elsevier BV; Volume: 381; Issue: 1-2 Linguagem: Inglês
10.1016/j.apcata.2010.03.032
ISSN1873-3875
AutoresOscar Marin‐Flores, Timothy Turba, Joe Breit, M. Grant Norton, Su Ha,
Tópico(s)Catalysis and Hydrodesulfurization Studies
ResumoAbstract A combination of thermodynamic calculations and experimental results was used to investigate the activity and stability of molybdenum dioxide (MoO2) as a catalyst for the partial oxidation of aviation jet fuels. The surrogate fuel used in this study was n-dodecane. Our results indicate that the stability window for MoO2 is strongly affected by the O2/C molar ratio. Thus, the formation of elemental carbon on the catalyst structure can be prevented using O2/C ratios higher than 0.5. However, O2/C ratios higher than 1.0 enhance the formation of MoO3, which is volatile and leads to the irreversible loss of catalytic material. The activity was measured at 850 °C and 1 atm and our findings indicate that, within the stability window determined earlier, the production rates of H2 and CO can reach values as high as 78% and 92%, respectively. The coking resistance of MoO2 was compared with that of a commercial nickel catalyst by performing activity tests under coke-promoting conditions. Energy dispersive X-ray analysis of the spent samples shows that MoO2 is much more resistant to deactivation by coking than the commercial nickel catalyst. Based on these results, MoO2 appears to be a promising catalyst for the partial oxidation of jet fuels.
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