Pafc Fuel Cell Working

As the name suggests pafcs use phosphoric acid as the electrolyte.

Pafc fuel cell working. Phosphoric acid fuel cell pafc the phosphoric acid fuel cell has potential for use in small stationary power generation systems. A phosphoric acid fuel cell pafc is composed of two porous gas diffusion electrodes namely cathode and anode juxtaposed against a porous electrolyte matrix. 2 pafc working principle. Developed in the mid 1960s and field tested since the 1970s they have improved significantly in stability performance and cost.

This type of fuel cell is used in stationary power generators with output in the 100 kw to 400 kw range to power many commercial premises around the world and they are also finding application in large vehicles such as buses. Afc uses platinum electrode catalysts. Electrons generated at the. Positively charged hydrogen ions migrate through the electrolyte from the anode to the cathode.

Most fuel cell systems that were sold before 2001 for the stationary power generation application used pafc technology. Direct methanol fuel cell dmfc. This makes it unsuitable for use in cars. The gas diffusion electrodes are composed of a porous substrate carbon or cloth facing the gas feed and a reactive catalyst layer consisting of platinized.

Alkaline fuel cells afcs generally use a solution of potassium hydroxide in water as their electrolyte and the operating temperature is 150 c 200 c. It operates at a higher temperature than polymer exchange membrane fuel cells so it has a longer warm up time. These fuel cells can work at up to 60 efficiency for fuel to electricity conversion and overall efficiencies can be over 80 in chp or ccp applications where the process heat is also utilised. Fuel cells are different from most batteries in requiring a continuous source of fuel and oxygen usually from air to sustain the chemical reaction whereas in a battery the chemical energy usually comes.

Definition of fuel cell construction and working of pafc phospheric acid fuel cell. Most fuel cell units sold before 2001 used pafc technology. Phosphoric acid fuel cells pafc are a type of fuel cell that uses liquid phosphoric acid as an electrolyte they were the first fuel cells to be commercialized. A fuel cell is an electrochemical cell that converts the chemical energy of a fuel often hydrogen and an oxidizing agent often oxygen into electricity through a pair of redox reactions.

Phosphoric acid fuel cells pafc operate at temperatures around 150 to 200 c about 300 to 400 degrees f.