Biogas fueled Solid Oxide Fuel Cells

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GRØN DYST 2014 Technical University of Denmark

Biogas fueled Solid Oxide Fuel Cells
Author:H. Langnickel (Department of Energy Conversion and Storage, Technical University of Denmark, Denmark)
Date: 2014-06-27     Track: Main     Session: 1

Due to the increasing amount of renewable energy in the power network different energy conversion and storage technologies are needed to balance the fluctuations in the grid. One attractive storage medium is fuel derived from biomass. However, given that biomass is a raw resource one should bear in mind that food production has first priority. Hence fuel derived from biomass, like biogas, has to be used in an efficient way. Whereas in commercial biogas power plants biogas is burned off with low efficient combustion engines, solid oxide fuel cells (SOFC's) could be a more efficient alternative. Furthermore most biogases are unattractive for combustion engines due to their low heating values. With SOFC's, which can be operated at temperatures between 700°C and 1000°C, it is possible to convert hydrogen or carbon containing fuels, as for example biogas, directly into electricity and the side product heat in a highly efficient way.