Phosphoric Acid PAFC

Phosphoric acid fuel cells (PAFC) use liquid phosphoric acid as an electrolyte - the acid is contained in a Teflon-bonded silicon carbide matrix - and porous carbon electrodes containing a platinum catalyst. The PAFC is considered the first generation of modern fuel cells. It is one of the most mature cell types, the first to be used commercially, and features the most proven track record in terms of commercial applications with over 200 units currently in use. This type of fuel cell is typically used for stationary power generation, but some PAFCs have been used to power large vehicles such as city buses. 

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Phosphoric acid (PAFC) CHP, power plants Phosphoric acid 465-485... 

Several types of fuel cell are currently under development, using different electrolyte systems phosphoric acid (PAFC), alkaline, molten carbonate (MCFC), regenerative, zinc-air, protonic ceramic, (PCFC), proton exchange membrane (PEM), direct methanol (DMFC), and solid oxide (SOFC). The last four contain solid electrolytes. 

Phosphoric Acid (PAFC) This is the most commonly used type of a fuel cell for stationary commercial sites like hospitals, hotels and office buildings. The cell operates at about 200 °C and shows the efficiency up to 85%. 

Phosphoric acid (PAFC). The electrolyte is concentrated H3P04 absorbed on to a solid matrix, and operates at 200°C. The electrodes are carbon loaded with platinum particles the anode fuel is hydrogen and the cathode fuel is air. The cell voltage is usually around 0.67 V. This type of cell has been tested commercially, producing 4.8 MW for several months at 40 per cent efficiency. 

Phosphoric acid (PAFC) H" 220 °C Large number of 200 kW CHP systems in use... 

From the point of view of polymer usage the types of particular interest are the PEM and the phosphoric acid PAFC designs. The latter design contains the liquid phosphoric acid in a Teflon bonded silicon carbide matrix. 

Phosphoric Acid (PAFC) Liquid phosphoric acid soaked in a matrix 175-200 Electric utility, transportation, and heat Up to 85% efficiency in cogeneration of electricity... 

There are some other fuel cells, such as phosphoric acid (PAFC) or molten carbonate (MCFC) [4], that are commercially available but will probably not find significant implementation due to high cost and durability issues. 

Polymer electrolyte PEFC Phosphoric acid PAFC Molten carbonate MCFC Solid oxide SOFC... 

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