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.
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.
Phosphoric acid fuel cells pafc operate at temperatures around 150 to 200 c about 300 to 400 degrees f.
Afc uses platinum electrode catalysts.
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.
Phosphoric acid fuel cell pafc the phosphoric acid fuel cell has potential for use in small stationary power generation systems.
2 pafc working principle.
Developed in the mid 1960s and field tested since the 1970s they have improved significantly in stability performance and cost.
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.
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.
Definition of fuel cell construction and working of pafc phospheric acid fuel cell.
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 operates at a higher temperature than polymer exchange membrane fuel cells so it has a longer warm up time.
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.
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.
Positively charged hydrogen ions migrate through the electrolyte from the anode to the cathode.
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.
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.
As the name suggests pafcs use phosphoric acid as the electrolyte.
