Micro-kinetic modeling of NH₃ decomposition on Ni and its application to solid oxide fuel cells
2011
Appari, Srinivas | Janardhanan, Vinod M. | Jayanti, Sreenivas | Maier, Lubow | Tischer, Steffen | Deutschmann, Olaf
This paper presents a detailed surface reaction mechanism for the decomposition of NH₃ to H₂ and N₂ on a Ni surface. The mechanism is validated for temperatures ranging from 700 to 1500K and pressures from 5.3Pa to 100kPa. The activation energies for various elementary steps are calculated using the unity bond index-quadratic exponential potential (UBI-QEP) method. Sensitivity analysis is carried out to study the influence of various kinetic parameters on reaction rates. The NH₃ decomposition mechanism is used to simulate SOFC button cell operating on NH₃ fuel.
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