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dc.contributor.authorChiuta, Steven
dc.contributor.authorEverson, Raymond C.
dc.contributor.authorNeomagus, Hein W.J.P.
dc.contributor.authorBessarabov, Dmitri G.
dc.identifier.citationChiuta, S. et al. 2016. Hydrogen production from ammonia decomposition over a commercial Ru/Al2O3 catalyst in a microchannel reactor: experimental validation and CFD simulation. International journal of hydrogen energy, 41(6):3774-3785. []en_US
dc.description.abstractIn this work, an integrated experimental and CFD modelling technique was used to evaluate a microchannel reactor producing hydrogen from ammonia decomposition using a commercial Ru/Al2O3 catalyst. The microchannel reactor performance was first assessed in a series of experiments varying the reaction temperature (723–873 K) and ammonia flow rates (100–500 Nml min−1) at atmospheric pressure. A global rate expression based on Temkin-Pyzhev kinetics that accurately predicts the entire experimental operating space was established using a model-based technique with parameter refinement and estimation. The kinetic model provided the reaction source term for subsequent CFD simulations aiming to obtain a more fundamental understanding of the reaction-coupled transport phenomena within the microchannel reactor. The transport processes and reactor performance were discussed in detail using velocity, temperature, and species concentration profiles. Finally, the influence of mass transport limitations within the various regions of the microchannel reactor was evaluated and discussed by means of dimensionless numbers vis-à-vis Damköhler and Fourier numbers. Overall, results presented in this paper provide valuable data for the efficient design of ammonia-fuelled microchannel reactors for hydrogen generation aimed at portable and distributed fuel cell applicationsen_US
dc.subjectTemkin-Pyzhev kineticsen_US
dc.subjectammonia decompositionen_US
dc.subjecthydrogen productionen_US
dc.subjectmicrochannel reactoren_US
dc.subjectCFD simulationen_US
dc.subjectRu/Al2O3 catalysten_US
dc.titleHydrogen production from ammonia decomposition over a commercial Ru/Al2O3 catalyst in a microchannel reactor: experimental validation and CFD simulationen_US
dc.contributor.researchID21876533 - Chiuta, Steven
dc.contributor.researchID10168249 - Everson, Raymond Cecil
dc.contributor.researchID12767107 - Neomagus, Hendrik Willem Johannes P.
dc.contributor.researchID22730389 - Bessarabov, Dmitri Georgievich

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