The name of the phosphoric acid fuel cell is based on the electrolyte phosphoric acid, Phosphoric Acid Fuel
Cell (PACF), and can be operated with gases containing carbon dioxide as fuel gas. The PACF fuel cell is one of the fuel cells that operate in the medium temperature range at around 200 °C.
It is suitable for stationary use.It is suitable for stationary use in combined heat and power plants and has a relatively low efficiency of
about 40 %. The power range is about 200 kW and can reach up to several megawatts. Thehydrogen and atmospheric oxygen, but also with liquid hydrocarbons. In contrast to the AFC fuel cell, in the PAFC fuel cell the phosphoric acid is not pumped through the fuel cell as a liquid, but is absorbed by the porous plastic fleece between the electrodes. The electrodes themselves consist of carbon material coated with precious metal particles.