chapter  13
16 Pages

High-Temperature Electrochemical Process of CO2 Conversion with SOCs 8

Cell and Stack Design, Fabrication, and Scale-Up
WithYun Zheng, Bo Yu, Jianchen Wang, Jiujun Zhang

The main components of single-cell solid oxide electrolysis cells (SOECs) include the fuel electrode, the electrolyte, and the oxygen electrode. Sealing of the cell is also much easier in tubular configurations than that of flat-plate configurations because the sealing area is significantly reduced. However, planar designs have been widely adopted due to their much shorter current collection paths and significantly higher volumetric density. The particulate method involves the compaction of ceramic powder into the components of SOEC cells and then densification at high temperatures, such as tape casting and tape calendaring. Efficient heat management can improve the overall efficiency of high-temperature electrolysis processes by reducing energy consumption and recovering some heat contained in the outlet products of the electrolysis. In SOEC systems, electricity, heat, and steam with CO2 enters the SOEC stack, and fuel products together with exhaust gases exit the system.