Pafc Fuel Cell Working

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.

Pafc fuel cell working.

Electrons generated at the. 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. This makes it unsuitable for use in cars. Most fuel cell systems that were sold before 2001 for the stationary power generation application used pafc technology.

Afc uses platinum electrode catalysts. 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. Phosphoric acid fuel cell pafc the phosphoric acid fuel cell has potential for use in small stationary power generation systems. Most fuel cell units sold before 2001 used pafc technology.

Phosphoric acid fuel cells pafc operate at temperatures around 150 to 200 c about 300 to 400 degrees f. Developed in the mid 1960s and field tested since the 1970s they have improved significantly in stability performance and cost. Positively charged hydrogen ions migrate through the electrolyte from the anode to the cathode. It operates at a higher temperature than polymer exchange membrane fuel cells so it has a longer warm up time.

Direct methanol fuel cell dmfc. Phosphoric acid fuel cells pafc the pafc technology is the most advanced fuel cell technology for development and commercial purposes. A phosphoric acid fuel cell pafc is composed of two porous gas diffusion electrodes namely cathode and anode juxtaposed against a porous electrolyte matrix. It has an electrolyte made of phosphoric acid its electrodes are mainly composed of carbon materials and it operates at temperature between 180 c and 210 c.

Definition of fuel cell construction and working of pafc phospheric acid fuel cell. 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. 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. As the name suggests pafcs use phosphoric acid as the electrolyte.

Most fuel cell power plants of megawatt capacity use mcfcs as do large combined heat and power chp and combined cooling and power ccp plants.