Steam reforming kinetics over Ni-YSZ used as Anode Material for Solid Oxide Fuel Cells
Tutor / director / evaluadorGrunwaldt, Jan-Dierk
Tipo de documentoProyecto/Trabajo final de carrera
Condiciones de accesoAcceso restringido por acuerdo de confidencialidad
The Solid Oxide Fuel Cell is an attractive technology with the potential to play an important role for energy supply in the future. SOFCs have many advantages, as its high efficiency and the possibility to operate with a wide range of hydrogen containing fuels, being methane one of the most employed. The SOFC operates at high enough temperatures to allow the methane to be reformed within the fuel cell stack. This is called internal reforming and it results in lower operating costs. Modelling a SOFC requires a deep knowledge of the rate of the methane steam reforming. The purpose of this project is to study the steam reforming kinetics on Ni-YSZ, a common anode material for solid oxide fuel cells. This project includes a literature study to give an overview on the SOFC technology and a more in depth study about the kinetics of the steam reforming on Nickel catalysts. An experimental part follows, in which results from the experiments on a tubular reactor are presented and discussed. It was found that the reaction rate was linearly dependent on the methane partial pressure and independent on the steam partial pressures. Moreover, results showed that hydrogen have a positive influence on the reaction rate. Initially planned experiments could not be completed due to problems with the experimental setup.
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