(687a) Studies On Solid Oxide Electrolysis Cells

 
High temperature solid oxide electrolysis cells (SOEC) are considered to be one
of the most practical and promising technologies for large scale renewable fuel
production. Compare to the conventional water electrolysis, high temperature
solid oxide electrolysis, which is operated in the temperature range of
700°C-1000 °C, have many advantages. The high operating temperature results in
faster reaction kinetics and reduces the electric energy demand thus enabling
potentially high efficiency. Furthermore, the SOEC can be used to
co-electrolysis with water and CO₂ to produce syngas (H₂
+ CO), which can be converted catalytic to various types of synthetic
hydrocarbon fuels ^1,2.

 
Operating SOEC at increased pressure may be advantageous as it eliminates the pressurization
of the product gases thus increasing the efficiency. Further, operation at high
pressure allows for integration with production of synthetic hydrocarbon fuels,
which are normally operated at pressures exceeding 40 bars ³.

 
This presentation will summarize the recent research and development results
and activities on SOEC at Risø DTU.

 [1]    A.O.
Isenberg, Energy-Conversion Via Solid Oxide Electrolyte Electrochemical-Cells
at High-Temperatures, Solid State Ionics 3-4 (1981) 431-437

[2]     S.D.
Ebbesen, C. Graves and M. Mogensen, Production of Synthetic Fuels by
Co-Electrolysis of Steam and Carbon Dioxide, International Journal of Green
Energy 6 (2009) 646-660

[3]     G.A.
Mills, Status and Future Opportunities for Conversion of Synthesis Gas to
Liquid Fuels, Fuel 73 (1994) 1243-1279